Instruction Manual

Polaris 60AZ-D: 60mm (2.4) Altazimuth Refracting Telescope
Meade Instruments Corporation
6001 OAK CANYON, IRVINE, CALIFORNIA 92618-5200 U.S.A.
(949) 451-1450 s FAX: (949) 451-1460 s www.meade.com

Rev. C 0603

WARNING:
NEVER USE AN POLARIS 60AZ-D TELESCOPE TO LOOK AT THE SUN! LOOKING AT OR NEAR THE SUN WILL CAUSE INSTANT AND IRREVERSIBLE DAMAGE TO YOUR EYE. EYE DAMAGE IS OFTEN PAINLESS, SO THERE IS NO WARNING TO THE OBSERVER THAT DAMAGE HAS OCCURRED UNTIL IT IS TOO LATE. DO NOT POINT THE TELESCOPE OR ITS VIEWFINDER AT OR NEAR THE SUN. DO NOT LOOK THROUGH THE TELESCOPE OR ITS VIEWFINDER AS IT IS MOVING. CHILDREN SHOULD ALWAYS HAVE ADULT SUPERVISION WHILE OBSERVING.

MEADE LIMITED WARRANTY

Every Polaris telescope, spotting scope, and telescope accessory is warranted by Meade Instruments Corporation (Meade) to be free of defects in materials and workmanship for a period of ONE YEAR from the date of original purchase in the U.S.A. Meade will repair or replace a product, or part thereof, found by Meade to be defective, provided the defective part is returned to Meade, freight-prepaid, with proof of purchase. This warranty applies to the original purchaser only and is non-transferable. Meade products purchased outside North America are not included in this warranty, but are covered under separate warranties issued by Meade international distributors. RGA Number Required: Prior to the return of any product or part, a Return Goods Authorization (RGA) number must be obtained from Meade by writing, or by calling (949) 451-1450. Each returned part or product must include a written statement detailing the nature of the claimed defect, as well as the owners name, address, and phone number. This warranty is not valid in cases where the product has been abused or mishandled, where unauthorized repairs have been attempted or performed, or where depreciation of the product is due to normal wear-and-tear. Meade specifically disclaims special, indirect, or consequential damages or lost profit which may result from a breach of this warranty. Any implied warranties which cannot be disclaimed are hereby limited to a term of one year from the date of original retail purchase. This warranty gives you specific rights. You may have other rights which vary from state to state. Meade reserves the right to change product specifications or to discontinue products without notice. This warranty supersedes all previous Meade product warranties.

TABLE OF CONTENTS

Introduction.5 Standard Equipment.5 Unpacking and Assembly.5 Altazimuth Mount Movements and Lock.5 Viewfinder Focusing and Alignment.6 Using the Telescope.6 Calculating Power.7 Maintenance.8 A Few Words About Power.8 Specifications.8 Optional Accessories.8

10 B A 3 24

Figure 1: Polaris 60AZ-D Altazimuth Refracting Telescope
Inset A: Accessory Tray Mounting Bolt Hole; Inset B: Close up of the Viewfinder Assembly
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.
Eyepiece Viewfinder Viewfinder collimation screws Optical tube assembly Vertical lock knobs Horizontal lock knob Tripod legs Leg brace supports Accessory tray Tripod-to-mount base attachment Tripod attachment bolts Accessory tray mounting bolt hole (see inset A) Diagonal Mirror
14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25.
Objective lens cell Focuser drawtube Altitude rod slow motion fine adjustment control Altitude rod coarse adjustment lock knob control Altazimuth mount Adjustable sliding center leg extension Tripod leg lock thumbscrew Dew shield/lens shade Front lens cap Focusing knob Viewfinder bracket Viewfinder bracket mounting thumbscrews

INTRODUCTION

Before you begin, we urge you to take a few minutes to completely read this manual so that you can get the best use of the equipment. This manual details the set-up, operation, specifications and optional accessories of the Polaris 60-AZ-D altazimuth refracting telescope. Designed for both astronomical and terrestrial observing, the Polaris 60-AZ-D will be your companion in exploring a universe of celestial and earthly objects.
STANDARD EQUIPMENT (Refer to Fig. 1)
Complete optical tube assembly (objective lens diameter = 60mm; focal length = 700mm) Full-length, fully adjustable, aluminum tripod and accessory tray. H 25mm (28X), H 12.5mm (56X), and SR 4mm (175X) Eyepieces (0.965" O.D. Outside Diameter) 3x Barlow Lens (0.965" O.D.) Diagonal mirror (0.965" O.D.) 5 x 24mm viewfinder with bracket Altazimuth mount with micro-altitude control Hardware package: A. 3 bolts (3" long) with wing nuts and washers B. 3 screws (1/2" long) with wing nuts and screwdriver tool Note: All other necessary hardware provided in place. StarLocator astronomy software (separate instructions supplied in software package)

UNPACKING AND ASSEMBLY

First time assembly of the telescope should require a set up of about 15 minutes. To set up the telescope, follow this procedure: 1. Remove and identify the telescopes components, using the listing above. 2. Attach the 3 aluminum tripod legs (7, Fig. 1) to the base of the altazimuth mount (10, Fig. 1) with the 3 hinged leg brace supports (8, Fig. 1) facing inward. Three bolts (11, Fig. 1), each about 2" long, with washers and wing nuts, are provided for this purpose in hardware package A. Stand the telescope upright, spreading the tripod legs evenly apart so that the accessory tray can be positioned to attach to the 3 leg braces. 3. Attach the accessory tray (9, Fig. 1) to the leg brace supports (8, Fig. 1) by threading the bolt on the bottom of the tray into the center hole located where the three brace supports meet (see Fig. 1, Inset A) and turning the tray clockwise. Tighten to a firm feel, but do not overtightenyou will need to remove the tray if you wish to collapse the tripod. To remove the tray, just rotate the tray counterclockwise untill the tray comes loose. 4. Extend the sliding center portion of the adjustable height tripod leg (19, Fig. 1) to the desired length for all 3 legs. Lock the tripod legs by tightening the leg lock thumbscrew (20, Fig. 1) to a firm feel. 5. Remove the two vertical lock knobs (D, Fig. 2) from the optical tube assembly. 6. Place the optical tube between the forks of the azimuth mount (A, Fig. 2), oriented as shown in Fig. 2. 7. Slide the altitude rod (B, Fig. 2) into the hole in the altitude coarse adjustment control assembly (C, Fig. 2). Tighten to a firm feel. 8. Thread a vertical lock knob (D, Fig. 2) through each of the holes in the forks of the azimuth mount (A, Fig. 2) and tighten to a firm feel. 9. Attach the viewfinder bracket (2, Fig. 1) to the telescope using the 2 thumbscrews provided (25, Fig. 1). The thumbscrews fit through the 2 holes located at the base of the viewfinder bracket and thread into the main tube (see Fig. 1, Inset B).
Fig. 2 Mounting the optical tube assembly: (A) azimuth mount; (B) altitude rod; (C) altitude coarse adjustment control; (D) vertical lock knob.
10. Insert the diagonal mirror (13, Fig. 1) into the focuser drawtube (15, Fig. 1) and the H 25mm eyepiece (1, Fig. 1) into the diagonal mirror. Tighten the respective thumbscrews to a firm feel. 11. The telescope is now completely assembled. To move the telescope and point it from one object to another, first slightly loosen one of the chrome-lock (star-shaped) knobs (5, Fig. 1) which serve as a vertical lock, then loosen the azimuth (horizontal) lock (6, Fig. 1). Also, slightly loosen the altitude coarse adjustment lock knob (17, Fig. 1). Loosening these locks allows the telescope to be moved freely (vertically or horizontally) in any direction so that the telescope can be positioned to center a terrestrial or celestial object in the telescopic field. Once an object is found, the altitude lock knob (17, Fig. 1) can be tightened and the altitude slow-motion fine-adjustment control knob (16, Fig. 1) can then be used to make very smooth and accurate tracking in the vertical axis.

VIEWFINDER FOCUSING AND ALIGNMENT
The 5 x 24mm viewfinder (2, Fig. 1) is a low-power, wide-field sighting device that, once aligned, will allow you to point the telescope with greater precision. Note: When you look through the viewfinder, you will see a crosshair with images that will be upside-down; this is normal. To work properly, the viewfinder must first be aligned to the telescopes main optical tube. To align the viewfinder, follow these steps: 1. Remove the lens cap (22, Fig. 1) of the optical tube assembly. Insert the 25mm wide-field eyepiece into the diagonal mirror (13, Fig. 1). Point the optical tube assembly (4, Fig. 1) at a distant land object (e.g. a distant telephone pole). Make sure the detail of the distant object you have chosen is in sharp focus. Focusing is accomplished by turning the focusing knob (23, Fig. 1) until the sharpest possible image is attained. 2. Center the viewfinder (2, Fig. 1) in both the front and rear rings using the collimation screws (3, Fig. 1). Next, looking through the viewfinder, adjust the collimation screws on the rear ring until the object centered in the telescopes main tube is likewise positioned in the center of the viewfinders crosshairs. Now it is possible to quickly sight an object in the viewfinder first, then find that object approximately centered in the 25mm eyepiece of the telescope. 3. If the viewfinders infinity image is not in sharp focus, the knurled end of the eyepiece can be turned to fine tune the focus. Be sure to hold the viewfinder firmly between your fingers when making this adjustment.

USING THE TELESCOPE

With the telescope assembled, you are ready to begin observations. 1. First, pick out an easy-to-find object. Observing land objects during the daytime is a good way to become accustomed to the operation of the telescope. At night, try observing the Moon at first (if it is visible) or a bright star. NEVER POINT THE TELESCOPE DIRECTLY AT OR NEAR THE SUN AT ANY TIME! OBSERVING THE SUN, EVEN FOR THE SMALLEST FRACTION OF A SECOND, WILL RESULT IN INSTANT AND IRREVERSIBLE EYE DAMAGE, AS WELL AS PHYSICAL DAMAGE TO THE TELESCOPE ITSELF. 2. To center an object in the main telescope, first use the aligned viewfinder to find the object you wish to observe. If necessary, slightly loosen the vertical lock (5, Fig. 1) and the altitude rod lock knob (17, Fig. 1) to re-position the telescope so that the desired object can be centered in the viewfinder. When the object is centered in the viewfinder, it should then, also, be somewhere in the main telescopes field of view. Next, using the 25mm eyepiece, center the object in the main telescopes field of view, and sharply focus the image by turning the focus knob (23, Fig. 1). The wide-field H 25mm eyepiece included as standard equipment is the best eyepiece to use for the initial finding and centering of an object. The low-power H 25mm eyepiece presents a bright, wide field of view, ideal for terrestrial and general astronomical observing of star fields, clusters of stars, nebulae, and galaxies. For lunar and planetary viewing, switch to a higher power eyepiece such as the H 12.5mm if you have good viewing conditions. If the image starts to become fuzzy

as magnification is increased, back down to a lower power; The atmosphere is not steady enough to support higher powers. Note: Changing eyepieces changes power. 3. If you are observing an astronomical object (the Moon, a planet, star, etc.) you will notice that the object will begin to move slowly through the telescopic field of view. This movement is caused by the rotation of the Earth and makes an object appear to be moving in the telescopes field of view. To keep astronomical objects centered in the field, simply move the telescope on one or both of its axes (vertical and/or horizontal) as appropriate. At higher powers, astronomical objects will seem to move through the field of view of the eyepiece more rapidly. Observing Tip: Place the object to be viewed at the edge of the field and, without touching the telescope, watch it drift through the field to the other side before repositioning the telescope so that the object to be viewed is again placed at the edge of the field, ready to be further observed. 4. Avoid touching the eyepiece while observing through the telescope. Vibrations resulting from such contact will cause the image to move. Avoid observing sites where vibrations may introduce image movement. Viewing from the upper floors of a building may also introduce image movement. 5. Allow a few minutes for your eyes to become dark adapted prior to attempting any serious observations. Use a red-filtered flashlight to protect your night vision when reading star maps, or inspecting components of the telescope. Tip: You can make your own red filtered flashlight by taping red cellophane over a flashlight lens. 6. Avoid setting up the telescope inside a room and observing through an opened or closed window pane. Images may appear blurred or distorted due to temperature differences between inside and outside air. Also, it is a good idea to allow your telescope to reach the ambient (surrounding) outside temperature before starting an observing session. 7. Planets and other objects viewed low on the horizon often lack sharpness the same object, when observed higher in the sky, will appear sharper and have greater contrast. Turbulent air in the atmosphere can cause images to shimmer in the eyepiece. Try reducing power (change your eyepiece) until the image steadies. Keep in mind that a bright, clear, but smaller image is more interesting than a larger, dimmer, fuzzy one. 8. Astronomical software or a good star atlas will assist you in locating many interesting celestial objects. These objects include: The Moon, covered with craters, mountain ranges, and fault lines. The Moon is best observed during its crescent or half phase when Sunlight strikes the Moons surface at an angle. It casts shadows and adds a sense of depth to the view. No shadows are seen during a full Moon, causing the bright Moon to appear flat and uninteresting. Cloud belts across the surface of the planet Jupiter. The 4 major moons of Jupiter, visible around the planet, changing position each night. Saturn and its famous ring system. Deep-Space: Nebulae, galaxies, multiple star systems, star clusters hundreds of such objects are visible through your Polaris telescope. If possible, observe under a dark sky, away from city lightsyou will be able to observe more deep-space objects through your Polaris telescope. Terrestrial objects: Your Polaris telescope may also be used for high-resolution land viewing. Important Note: Using the diagonal mirror results in an image which is reversed left-for-right, but which is correctly oriented up-and-down. Terrestrial observations should almost always be made using the 25mm low-power eyepiece for bright, sharp images. Observing horizontally through the Earth's atmosphere distorts images in higher-power eyepieces (such as 12.5mm).

CALCULATING POWER

The power (magnification) at which a telescope is operating is calculated by dividing the focal length of the telescope by the focal length of the eyepiece. The focal length of the 60-AZ-D telescope is identified on the focuser label as being 700mm (F = 700mm). The focal length of the eyepiece is usually identified on the top of the eyepiece barrel.
For example, if you are using a 25mm eyepiece, the resulting power will be: Power = 700mm 25mm = 28X. For example, if you are using a 12.5mm eyepiece, the resulting power will be: Power = 700mm 12.5mm = 56X. The purpose of a Barlow lens is to increase the magnification possible with a given eyepiece. The 3x Barlow supplied with this telescope will triple the normal eyepiece power. For example, the 25mm (28X) eyepiece, when used in conjunction with the 3x Barlow lens, yields 84X. The 12.5mm (56X) eyepiece yields 168X when used with the 3x Barlow lens. To use the 3x Barlow lens, remove the diagonal mirror (13, Fig. 1) from the focuser drawtube (15, Fig. 1). Then insert the 3x Barlow lens, followed by the diagonal mirror (13, Fig. 1) and finally the 25mm eyepiece (1, Fig. 1). Refocus until the image is sharp.

POWER AND EYEPIECES

The useful higher magnification with any 60mm diameter telescope is in the range of 80 to 120 power. The general rule to follow with any telescope, regarding power: Only use as much magnification as a steady, well-defined image supports. The stability of the air varies and is one reason why having various eyepieces is desirable. Higher powers are no guaranty of better images; in fact, the opposite is often true.

MAINTENANCE

As with any quality optical instrument, lens surfaces should be cleaned as infrequently as possible. A little dust on the surface of the objective lens (14, Fig. 1) causes negligible degradation of image quality and should not be considered reason to clean the lens. When lens cleaning does become necessary, use a camel hair brush or compressed air to gently remove dust. Wipe only with a soft, clean cloth, applying as little pressure as possible to avoid scratching glass surfaces. Note: Gently pull off and remove the the dew shield/lens shade (21, Fig. 1) to access the objective lens (14, Fig. 1).

SPECIFICATIONS

Objective (main) lens focal length.700mm Objective lens diameter.60mm (2.4") Focal ratio.f/11.7 Mounting type.Altazimuth

OPTIONAL ACCESSORIES

#Erect-Image Roof Prism (0.965 O.D.): Correctly orients the telescopic image during terrestrial observing and yields an image position at a 45 angle to the main telescope tube, resulting in a more comfortable observing position in most cases. Additional Eyepieces (0.965"): Meade recommends the following eyepieces for enhanced astronomical and/or terrestrial viewing: MA 9mm (0.965" O.D.): Provides high quality, higher power, close-up observation of the Moon and planets (78X). MA 40mm (0.965" O.D.): Offers the most dramatic, wide field of view for observing deep-space objects. This is also the eyepiece most recommended for viewing objects on land (18X). WRITE FOR THE FULL-LINE MEADE GENERAL CATALOG MEADE INSTRUMENTS CORPORATION 6001 OAK CANYON IRVINE, CA 92618 FOR SERVICE CALL (949) 451-1450, 8:30AM-4:00PM PACIFIC TIME, MONDAY-FRIDAY.

P/N 14-0500-00 06/00

CONTENTS
Introduction....5 Unpacking....5 Assembly: 60mm and 70mm models...5 Assembly: 80mm, 90mm, 114mm, and 127mm Models..7 Balancing the Tube in the Mount...7 Attaching the Viewfinder....7 Focusing the Viewfinder...9 Aligning the Viewfinder...9 Observing Through the Telescope...9 The Focuser and the Eyepiece-Holder..10 Astronomical Observing...10 Eyepieces and Magnification...10 The Barlow Lens....10 A Note About Power....11 Collimation of the Telescope's Optical System...11 Maintenance.....11 Questions and Repairs...11 Appendix 1: Optical Alignment of 114mm and 127mm Models:..13 Appendix 2: Telescope Control Systems...15 #490 Manual Slow-Motion Control set..15 #492 Dual-Motor Electronic Control System...15 To Install the #492 System...15 Operating Notes on the #492 Dual-Motor Electronic Control System.17 #493 Autostar Computer Control System...18 To Install the #493 System...18 Appendix 3: Optional Electronic and Computer Drive Systems..19 #490 Manual Control Set....19 #492 Dual-Motor Electronic Control System...19 #493 Autostar Computer Control System...19 #495 Autostar Handbox...19 #497 Autostar Handbox...19
The name Meade, the Meade logo, and Autostar are trademarks registered with the U.S. Patent Office and in principal countries throughout the world. All rights reserved. 2000 Meade Instruments Corporation.
Assembly and Operating Instructions for Meade Digital Electronic Telescope Series
60mm (2.4"), 70mm (2.8"), 80mm (3.1"), 90mm (3.5") Refracting Telescopes; 114mm (4.5"), and 127mm (5") Reflecting Telescopes Numbered references are to the figures on the pages of this manual. Example: D-4 refers to item 4 of Fig. D. WARNING! Never use a Meade DS Telescope to look at the Sun! Looking at or near the Sun will cause instant and irreversible damage to your eye. Eye damage is often painless, so there is no warning to the observer that damage has occurred until it is too late. Do not point the telescope or its viewfinder at or near the sun. Do not look through the telescope or its viewfinder as it is moving. Children should always have adult supervision while observing. CAUTION: Use care to install batteries as indicated by the battery compartment. Follow battery manufacturers' precautions. Do not install batteries backward or mix new and used batteries. Do not mix battery types. If these precautions are not followed, batteries may explode, catch fire, or leak. Improperly installed batteries void your Meade warranty.
Introduction: Meade Digital Electronic Telescope Series (DS) models are illustrated in the following figures: Fig. A 60mm and 70mm refracting telescopes; Fig. B 80mm and 90mm refracting telescopes; Fig. C 114mm and 127mm reflecting telescopes. Telescope optical specifications (diameter, D, and focal length, F) are printed on a foil plate affixed to the optical tube. Example: 60mm models have a diameter D = 60mm and a focal length F = 700mm. Meade DS instruments are available in a variety of trade names (Polaris, Saturn, TeleStar, etc.), with different levels and types of accessorization. All of these telescopes, however, share the same basic optical tube assemblies, mechanical mountings, tripods, and other features. The instructions provided here apply equally well to all DS trade names. All Meade DS telescopes are similar in assembly and operation. Fig. A is used in these instructions for most references where assembly or operation is identical among all the models. Differences among the models, where these differences affect assembly or operation, are pointed out below. Users of DS models which include (either as part of the original telescope or purchased separately as an optional feature) an additional telescope control system (such as the #490 Manual Slow-Motion Control Set, the #492 Dual-Motor Electronic Control System, or the #493 Autostar Computer Control System) should first assemble the basic telescope; instructions for adding one of these optional control systems are given in Appendix 2 of this manual. Unpacking: Locate and remove the following components and parts from the packing box: optical tube (A-1); viewfinder (A-4) and viewfinder bracket (A-5); yoke mount (A-6); tripod legs (A-7); poly bag with 3 bolts and nuts for attaching the tripod to the yoke (60mm and 70mm models only); accessory shelf (A-8); one or more eyepieces (A-9); diagonal mirror (A-10, not included with 114mm and 127mm models). On 60mm and 70mm models the optical tube is factory-attached to the yoke mount and the tripod legs are packed separately in the packing box. On all other models the yoke mount is factory-attached to the three tripod legs and the optical tube is packed separately in the packing box. Assembly: 60mm and 70mm Models Attach the three (aluminum) tripod legs to the base of the yoke mount, as shown in Fig. A. In attaching each leg, slide one of the bolts through the hole (A-12) at the top of the leg, thread the hex nut on to the opposite end of the bolt, and

use a + (Phillips-head) screwdriver to tighten the bolt to a firm feel. Do not overtighten. Note that each tripod leg includes a flip-lock (A-13) for adjusting the overall length of the tripod. These flip-locks should all face inward as the legs are attached to the yoke mount. With the tripod legs attached to the yoke mount and sitting on a flat surface, spread the legs out gently until all legs are fully spread out. Attach the accessory shelf (A-8) to one of the tripod legs by placing one of the shelfs flanges (A-20) at one edge of a tripod leg and then pulling the shelf around the leg until the other shelf flange snaps into place. (To remove the accessory shelf, push one of the flanges with both thumbs from the outside surface of the tripod leg.) The accessory shelf can be pushed up or down the tripod leg to a convenient height. The telescope should now appear as in Fig. A, except that the viewfinder (A-4) has not yet been attached. Note: Assembly of 60mm and 70mm models supplied with hardwood tripods is similar to the assembly described above. Each tripod leg attaches with one of the supplied bolts (D-5) through holes at the top of the leg; a washer and wing nut (D-6) fasten each leg to the base of the yoke mount (D-7). The metal flange (D-1) of each wood tripod leg should face inward. Attach the metal, triangle-shaped accessory shelf (D-2) to each of the three tripod legs using the thumbscrews (D-3) and wing nuts provided. To adjust tripod height, slide the inner section of each tripod leg up or down, securing it in position with firm-feel tightening (do not overtighten) of the thumbscrew (D-4). Assembly: 80mm, 90mm, 114mm, and 127mm Models Place the tripod (with yoke mount attached) on a flat surface and gently spread the three tripod legs outward until they are fully spread out. Each of these models includes a cradle ring system (B-1 or C-1), permitting the optical tube to be moved upward or downward within the cradle rings for proper balancing of the tube on the yoke mount. As the yoke mount/tripod assembly is removed from the packing box, only the lower-half (E-1) of each cradle ring is present. Locate the upper half (E-4) of each cradle ring in the packing box and connect each upper-half ring to its respective lowerhalf ring by inserting the flange (E-2) of each upper-half ring into the slot (E-3) located at the top of the lower-half ring. Be certain that each flange (E-2) is firmly seated into the corresponding slot. Each upper-half ring should now close down to form a complete circular ring without undue pressure being required. Open the upper-half rings and place the optical tube into the cradle rings. See Fig. F. Close the rings and tighten (to a firm-feel only) the latches (E-5). The telescope should now appear as in Figs. B or C, except that the viewfinder (B-6) or (C-6) has not yet been attached. The flip-lock (B-9 or C-10) on each tripod leg permits adjustment of tripod height. Balancing the Tube in the Mount (80mm, 90mm, 114mm, and 127mm models only): Loosen slightly (by rotating half a turn counterclockwise) the vertical lock (B-2 or C-2). Placing your hand on the upper end of the optical tube, move the tube up and down in a vertical direction within the U-shape yoke mount (B-4 or C-4). The tube should move easily and be well-balanced about the vertical axis of motion; if not, slightly loosen the cradle ring latches (E-5), move the optical tube up-or-down within the cradle rings to achieve good balance, and re-tighten the latches (E-5). Attaching the Viewfinder: Because the main telescope has a fairly narrow field of view, locating objects directly in the main telescope can sometimes be difficult. The viewfinder (A4) is a small, wide-field telescope with crosshairs that permits easy object location. With the viewfinder and main telescope aligned to each other, so that both point to the same position in the sky, the observer first locates an object in the viewfinder; the object is then also positioned within the field of the main telescope. The viewfinder bracket (A-5) attaches to the focuser housing at the position shown in Figs. A, B, or C. (On 114mm and 127mm models the viewfinder bracket attaches to the mounting block (C-7) located on the main telescope tube, near the focuser.) Using a + (Phillips-head)

176mm (6.9")

6 x 30mm

30mm (1.2")

148mm (5.8") 24mm (0.94")

5 x 24mm

screwdriver, secure the bracket in position by tightening the two attachment screws (G-1) inside the bracket (these screws are placed inside the bracket at the factory) into the mating threads (G-6) located on the focuser housing, or (in the cases of 114mm and 127mm models) located on the mounting block (C-7). Slide the viewfinder (G-2), eyepiece-end (G-8) first, into the viewfinder bracket. (Remove the rubber eyecup (G-8) from the viewfinder before sliding the viewfinder into the bracket. Replace this rubber eyecup after the viewfinder is positioned in the bracket.) Tighten (to a firm-feel only) the four alignment thumbscrews (G-3) to hold the viewfinder in the bracket. Focusing the Viewfinder: Each Meade DS telescope is supplied with one of two viewfinder models, 5 x 24mm or a larger 6 x 30mm. Identify the viewfinder of your telescope from Fig. H. Focusing the 5 x 24mm viewfinder is accomplished by turning the viewfinder eyepiece (H1) on its internal thread. Generally a few turns are sufficient to achieve proper focus. The 6 x 30mm viewfinder is locked into permanent focus at infinity. Look through the 6 x 30mm viewfinder at a distant land object; if the focus is not sharp, then follow this procedure: (a) loosen the focus lock ring (H-2) a few turns, permitting the lens cell (H-3) to be rotated; (b) looking through the viewfinder at a distant land object, rotate the lens cell until the object is sharply focused; (c) tighten the focus lock ring (H-2) up against the lens cell. Important Note: Objects appear upside-down and reversed left-for-right when observed in the viewfinder. With refracting telescope Models DS-60, DS-70, DS-80, and DS-90, objects viewed through the main telescope with the diagonal mirror (A-10) in place are seen right-sideup, but reversed left-for-right. This image inversion is of no consequence when observing astronomical objects, and in fact all astronomical telescopes yield inverted images. During terrestrial observing, where a fully-correctly-oriented image (right-side up and correct left-for-right) is desirable, an optional Meade 45 Erecting Prism (available in either 0.965" or 1.25" format to suit the appropriate Meade telescope model) is available. See the optional accessories sheet which accompanies the telescope or consult the Meade Telescope Catalog. Note that for reflecting telescopes, including Meade Models DS-114 and DS-127, no means of image inversion is available; while these telescopes may be used for terrestrial observing, the image will not be correctly oriented in either right-side-up or left-for-right orientations. Aligning the Viewfinder: Loosen the vertical (A-14) and horizontal (A-15) locks, by turning the lock knobs about one turn counterclockwise, permitting the telescope to move freely on both axes. Place a low-power (e.g., 25mm) eyepiece in the focuser of the main telescope and point the telescope at an easy-to-find land object (e.g., the top of a telephone pole). Turn the focuser knob (A-16) so that the image is sharply focused, and center the object precisely in the main telescopes field of view. Re-tighten the lock-knobs (A-14) and (A-15). Then, looking through the viewfinder, turn the viewfinders four alignment screws (G-3) until the viewfinders crosshairs point precisely at the same object as centered in the main telescope. The viewfinder is now aligned to the main telescope. The right-hand image in Fig. J shows an object centered in the main telescope before the viewfinder (the left-hand image) has been aligned to the main telescope. Fig. K shows these same images after the viewfinder and main telescope are aligned. Assembly of the basic telescope is now complete. If your telescope includes one of the DS optional features, continue to Appendix 2 to complete the assembly of the optional feature before observing. Observing Through the Telescope: Place the diagonal mirror (A-10) in the telescopes eyepiece-holder (A-17) and tighten the thumbscrews of the eyepiece-holder to secure the diagonal mirror in place. (Note that DS 114mm and 127mm reflecting telescope models do not include, and do not require, a diagonal mirror.) Place a low-power (e.g., 25mm) eyepiece into the diagonal mirror (or, with DS 114mm and 127mm models, directly into the eyepiece-holder), and tighten the eyepiece in place with the thumbscrews (A-18) provided.

The diagonal mirror permits a comfortable 90 angle for observing sky objects with DS 60mm through 90mm refracting telescopes; in addition the diagonal mirror results in an upright, but reversed left-for-right, image through the telescope during terrestrial observations. Loosen the vertical (A-14) and horizontal (A-15) locks, by turning the lock knobs about one turn counterclockwise. The telescopes main tube now moves easily in either vertical or horizontal directions. Alternately, partially-locking these locks provides a comfortable drag, neither too loose nor too tight, in the motion of the telescope tube about the vertical and horizontal axes. Experiment to find the best lock-knob tensions. Begin by observing easy-to-find land objects. Obtain a sharp image by turning the focuser knob (A-16). Use the viewfinder to locate objects before observing them in the main telescope. Start the observation of any object, astronomical or terrestrial, with a low-power eyepiece (see Eyepieces and Magnification, below), stepping up to higher power eyepieces, if desired, after the image is centered and focused in the main telescope. The Focuser and Eyepiece-Holder: Depending on the telescope model, Meade DS telescopes are supplied with an eyepiece-holder (G-4) that accepts eyepieces of either.965" (24.5mm) or 1.25" (31.7mm) barrel-diameter. DS models of 70mm and larger also include a separate eyepiece-holder that accepts giant, wide-field eyepieces of 2" (50.8mm) barrel-diameter, such as the optional Meade MH50mm eyepiece. This 2" eyepiece-holder ring threads on to the end of the focuser drawtube and replaces the standard eyepiece-holder (G-4) when 2" eyepieces are employed. The focuser drawtube lock (G-5) helps to prevent focuser slippage when heavier accessories are added to the eyepiece end of the telescope. Astronomical Observing: With the telescope focused on a celestial object such as the Moon, a planet, or a deep-space galaxy or nebula, the object is seen to move quite rapidly through the telescopic field of view. This apparent motion is caused by the Earths rotation on its axis once every 24 hours. To follow, or track, the object, place a hand on the main telescope tube and move the telescope on one or both of its vertical and horizontal axes. Tracking astronomical objects, particularly at higher powers, is greatly facilitated with the addition of a manual or electronic telescope control system. See Appendix 2. Eyepieces and Magnification: The magnification, or power, of a telescope is determined by two factors: the focal length, F, of the main telescope (this focal length is printed on a label affixed to the telescope tube or focuser), and the focal length of the eyepiece employed. Each Meade telescope is supplied with one or more eyepieces; some models also include a Barlow lens, described below, which doubles or triples eyepiece power. To calculate the power at which the telescope is operating, use this formula: Power Focal Length of Main Telescope = __________________________ Focal Length of Eyepiece

Example: Meade 60mm DS telescopes have a focal length of 700mm. The power obtained with a 25mm eyepiece is calculated as: Power 700mm = _______ = 28 times (written as 28X) 25mm
The optical type of an eyepiece (e.g., SR, H, MA, MH, etc.) has no bearing on power, but does affect such characteristics as field of view and image corrections. The Barlow Lens: Some Meade telescopes include a power multiplier called a Barlow lens. Consisting of a lens mounted in a 4" (10cm)-long tube, the Barlow doubles or triples the power

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obtained when an eyepiece is used alone. In the example above a 25mm eyepiece results in 28X magnification with the Meade 60mm DS telescope; when this same eyepiece is used in conjunction with a 2x Barlow lens, power is doubled to 56X. To use the Barlow, insert it into the telescopes focuser/eyepiece-holder (A-17), followed by the diagonal mirror and an eyepiece. (With Meade 114mm and 127mm DS telescopes, insert the Barlow into the telescopes focuser/eyepiece-holder, followed directly by an eyepiece.) A Note About Power: The most common mistake of the beginning observer is to use powers which the telescopes aperture (diameter) and typical atmospheric conditions cannot reasonably support. The result is an image which is fuzzy, ill-defined, and poorly resolved, through no fault of the telescope. Keep in mind that a smaller, lower-power but brighter and well-resolved image is far superior to a large, high-power, but dim and poorly-resolved one. Most commonly, Meade DS telescopes are best used at powers from about 30X (for land observing and for extended astronomical objects such as diffuse nebulae and star clusters) to about 150X (for more detailed study of the Moon and planets). Use higher powers only when the air is steady and when such powers actually increase the level of visible detail. Collimation of the Telescopes Optical System: The optical systems of Meade 60mm through 90mm refractors are collimated (aligned) at the factory and never require adjustment. Similarly, it is unlikely that the user of a Meade DS 114mm or 127mm reflecting telescope will need to adjust the factory-aligned optics of either of these models. Users of 114mm and 127mm models should, however, read Appendix 1 to confirm this point. Maintenance: The objective lenses of Meade DS 60mm through 90mm refracting telescopes and the primary and secondary mirrors of DS 114mm and 127mm reflecting telescopes should be cleaned as infrequently as possible. A little dust on a lens or mirror causes negligible loss of image quality and should not be considered as reason to clean it. If the telescopes dust cover (A-3) is replaced after each observing session, cleaning the optics will rarely be required. When cleaning a lens or mirror does become necessary, use a camels hair brush or compressed air gently to remove dust. The dew shield (A-19) of 60mm through 90mm refracting telescopes should be removed to access the lens prior to cleaning. Questions and Repairs: In the U.S.A. questions concerning any Meade DS telescope, accessories, or optional systems should be directed to: Customer Service Dept., Meade Instruments Corp., 6001 Oak Canyon, Irvine, California 92618; FAX: (949) 451-1460; Telephone: (949) 451-1450. Do not return a telescope or telescope part to Meade Instruments before calling or writing us first; the great majority of repair situations can be handled without requiring return of the telescope to us. Outside the U.S.A. please contact the Meade international distributor in your country. A listing of Meade international distributors is included in the Meade website www.meade.com. 4

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Appendix 1: Optical Alignment of 114mm and 127mm Models
Meade DS 60mm, 70mm, 80mm, and 90mm refracting telescopes are optically aligned (collimated) at the factory prior to shipment, and it is never necessary to re-collimate the optics of these models. Meade DS 114mm and 127mm reflecting telescope models are also factoryaligned, but may occasionally require re-alignment, particularly if the telescope has received rough handling in shipment. Before using one of these models for the first time, check the alignment of the optics as outlined in this appendix. Good optical alignment is essential for telescope performance, and in any case the alignment procedure is not difficult to follow. Refer to Figs. L through S: The optical systems of Meade DS reflecting telescopes include the following parts: primary mirror (L-1); secondary mirror (L-2); secondary mirror-holder (L-3); secondary mirror-vanes (L-4 and M1); primary mirror-tilt screws (L-5). The telescopes image is brought to a focus at (L-6). 1. Confirm alignment: To confirm optical alignment look down the focuser drawtube (C-11 and P-1) with the eyepiece removed. The edge of the focuser drawtube frames reflections of the primary mirror (P-2), the secondary mirror (P-3), the three (spider) vanes (P-4) holding the secondary mirror, and the observers eye (P-5). With the optics properly aligned, all of these reflections appear concentric (centered), as shown in Fig. P. Any deviation from concentricity of any of these telescope parts with the eye requires adjustments to the secondary mirrorholder (Fig. M) and/or the primary mirror cell (Fig. N), as described below. 2. Secondary mirror-vane adjustments: If the secondary mirror (Q-1) is left or right of center within the drawtube (Q-2), slightly loosen the 3-vane adjustment/lock knobs (M-1) located on the outside surface of the main tube and slide the entire secondary mirror-holder system up or down in the slotted holes of the main tube until the secondary mirror is centered in the drawtube. If the secondary mirror (Q-1) is above- or below-center within the drawtube, thread inward one of the adjustment/lock knobs (M-1) while unthreading another of these knobs. Only make adjustments to two knobs at a time until the secondary mirror appears as in Fig. R. 3. Secondary mirror-holder adjustments: If the secondary mirror (R-1) is centered in the focuser drawtube (R-2), but the primary mirror is only partially visible in the reflection (R-3), the three + (Phillips head) secondary mirror-tilt screws (M-2) should be slightly unthreaded to the point where the secondary mirror-holder (M-3) can rotate about its axis parallel to the main tube. Grasp the secondary mirror-holder (avoid touching the mirror surface!) with your hand and rotate it until, looking through the drawtube, you can see the primary mirror centered as well as possible in the reflection of the secondary mirror. With the rotation of the secondary mirror-holder at this best-possible position, thread in the three Phillips-head screws (M-2) to lock the rotational position. Then, if necessary, make adjustments to these three Phillipshead screws to refine the tilt-angle of the secondary mirror, until the entire primary mirror can be seen centered within the secondary mirrors reflection. With the secondary mirror thus aligned the image through the drawtube appears as in Fig. S. 4. Primary mirror adjustments: If the secondary mirror (S-1) and the reflection of the primary mirror (S-2) appear centered within the drawtube (S-3), but the reflection of your eye and the reflection of the secondary mirror (S-4) appear off-center, then the primary mirror-tilt requires adjusting, using the Phillips-head screws of the primary mirror cell (N-3). These primary mirror-tilt screws are located behind the primary mirror, at the lower end of the main tube. See Fig. N. Before adjusting the primary mirror-tilt screws, first unscrew by several turns (use either a hex wrench or pliers) the three hex-head primary mirror lock screws (N-2) which are also located on the rear surface of the primary mirror cell and which alternate around the cells circumference with the three Phillips-head screws. Then by trial and error turn the primary mirror Phillips-head tilt screws (N-3) until you develop a feel for which way to turn each screw to center the reflection of your eye in the drawtube. (An assistant is helpful in this operation.) With your eye centered as shown in Fig. P, turn the three hex head primary mirror lock screws (N-2) to re-lock the tilt-angle of the primary mirror. The telescopes optical system is now aligned, or collimated. This collimation should be rechecked from time to time, with small adjustments (per steps 1, 2, and/or 3, above) effected as required to keep the optics well-aligned.

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Appendix 2: Telescope Control Systems
Depending on the Meade DS telescope model, one of the following manual or electronic control systems may be included in the telescopes standard specifications. (Telescope specifications are generally listed on the box in which the telescope is packed.) Alternately, any of these control systems may be purchased separately as an optional feature. #490 Manual Slow-Motion Control Set: The #490 Control Set permits manual tracking of astronomical and terrestrial objects through the telescope, by turning one or both of the manual control knobs; one slow-motion control is attached to each of the vertical and horizontal axes of the telescope, as shown in Figs. T and U. If purchased as an option, the instructions for mounting the #490 are included with the control set itself. If this feature is standard on your telescope, the control set is preassembled on the telescope, except the control knobs (T-1 and T-2). Attach these knobs with the provided hex key. Be sure to align the set screw with the flat on the shaft. With the lock-knobs (U-1) and (U-2) in their locked positions, the observer may track, or follow, any object, astronomical or terrestrial, by turning one or both of the control knobs (T-1) and (T-2). To move the telescope rapidly from one point in the sky to another, unlock the lockknobs (U-1) and (U-2), relocking them once the desired object has been placed in the telescopic field. Note that placing each of the two lock-knobs in a partially-locked position creates a comfortable drag in moving the telescope. Experiment with the lock-knobs to find the optimum lock tensions for your applications. #492 Dual-Motor Electronic Control System: With the #492 Electronic Control System attached to any Meade DS telescope, all motions of the telescope, including moving the telescope to an object, centering it in the field of view, and tracking it (in the case of an astronomical object) to compensate for the Earths rotation, may be effected through the pushbutton Electronic Controller (Fig. X). If purchased as an option, the instructions for mounting the #492 are included with the control system itself. If this feature is standard on your telescope, the user needs to attach the motor assemblies to the telescope, as described below. The #492 System consists of the following components, each of which should be located in the packing before installation to the telescope is attempted (see Figs. V and Y): battery pack (Y-1); accepts ten AA-size user-supplied batteries) with cord; two small hex wrenches; two (identical and interchangeable) motor assemblies (V-1) and (V-4) with cords; one Electronic Controller handbox (Fig. X). (Note that for clarity cords attached to the motor assemblies and battery pack are not shown in the accompanying Figs. V and Y of the #492 Control System.) To install the #492 System: 1. Place ten AA-size batteries inside the battery pack (Y-1), with correct battery orientation as indicated on the battery packs internal holder; attach the battery pack to one of the tripod legs using the Velcro fastener as shown in Fig. Y, or set it on the accessory shelf (Fig. Y). 2. Attach the vertical motor assembly (V-1) to the vertical control unit by placing the knurled ring (V-2) of the motor assembly over the reduction gear (V-3). Note that three small plastic tabs project outward about 3mm (1/8") from the face of the threaded ring near the reduction gear (V-3). These locator tabs must fit into mating slots located just-inside the knurled ring (V-2). Wiggle the motor assembly (V-1) to engage the reduction gear (V-3) with the internal gears of the motor assembly (V-1). The knurled ring (V-2) locks into position by threading it to a mating thread located on the vertical control unit. Turn the knurled ring to a firm-feel only; do not overtighten.

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COMPUTER CONTROL

HBX AZ ALT AUX

IN FOCUS OUT SPEED MODE

FOCUS OUT

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3. Attach the horizontal motor assembly (V-4) to the telescope by following the same procedure outlined in step 2, above. Note: With both the vertical and horizontal motor assemblies attached, the telescope now appears as in Fig. Y. (Note that cords have been omitted from Fig. Y for clarity.) 4. Plug in the following cords to the control panel (V-5 and Fig. W): Cord from the vertical motor assembly (V-1) plugs into the ALT (altitude, or vertical) jack (Fig. W). b. Cord from the horizontal motor assembly (V-4) plugs into the AZ (azimuth, or horizontal) jack (Fig. W). c. Cord from the Electronic Controller (Y-2) plugs into the HBX (handbox) jack (Fig. W). 5. Finally, plug the cord from the battery pack (Y-1) into the 12v jack (Fig. W). 6. As soon as the battery pack is connected to the 12v jack on the control panel, all four indicator lights on the Electronic Controller (Fig. X) start blinking rapidly. Press the SPEED key on the Electronic Controller and the telescope slews (moves) momentarily in the vertical and horizontal directions to test the motors. When the test is complete, Light 1 (see Fig. X) comes on steady; Lights 2, 3, and 4 turn off. 7. The #492 Dual-Axis Electronic Control System is now operational. Use the four arrow keys (X-5) to slew the telescope to the desired object. To change speeds, press the SPEED key (X6) on the Electronic Controller. Depressing this key consecutively causes telescope speed to cycle through all of the four available speeds, from fast to very slow. The speed in operation is indicated by the four indicator lights (1, 2, 3, and 4, Fig. X) on the Electronic Controller, as follows: Light 1: Light 2: Light 3: Light 4: 5/second (fast). Use this speed to move the telescope across the sky rapidly from one object to another. 0.75/second (moderate). Use to center objects in the field of the viewfinder. 8 arc-minutes/per second (slow). Use to center objects in the field of view or to track objects at lower powers. 2 arc-minutes/sec. (very slow). Use to center objects in the field of view or to track objects at higher powers (e.g., above magnifications of about 80X). a.
Operating Notes on the #492 Dual-Motor Electronic Control System: 1. For the motors of the #492 System to be operational, the vertical and horizontal lock-knobs (V-6) and (V-7) must be in their locked positions. Firm-feel tightening of these locks is sufficient. Do not overtighten. 2. When setting up the telescope, always plug in the battery pack to the control panel last, after plugging in the two motors and the Electronic Controller. Connecting the battery pack to the control panel before the motors and Electronic Controller are connected may result in false electrical signals being sent to the motors, causing them to malfunction. In this case unplug the battery pack from the control panel, wait a few seconds, and plug the battery pack back into the control panel. This operation clears the motors of any false signals. 3. When using the arrow keys (X-5) to reverse the direction of motion of the telescope (e.g., when changing the telescope's direction of motion from horizontal-right to horizontal-left), there may be a brief pause before the telescope begins moving. This pause is caused by the internal gears of the motor assemblies. 4. The MODE key of the Electronic Controller (Fig. X) is inoperative on the #492 System; pressing this key has no effect. (The MODE key is used in certain specialized operations on other Meade telescope models where equatorial (polar) alignment of the telescope is desired.)

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5. The IN and OUT keys are used in conjunction with the optional Meade #1240 Electric Focuser. With the #1240 unit attached to the telescopes focuser, precise focusing of the telescopic image may be accomplished directly from the Electronic Controller. Detailed instructions are included with the #1240 Electric Focuser. 6. Note that the telescopes accessory shelf (A-8) includes a holder (A-21) for the Electronic Controller. 7. When using the #492 System, take care that cords do not become wrapped around the telescope; keep the cords loose at all times. Do not allow the telescope to slew into the tripod or other fixed object. Do not touch or hold the telescope tube while it is moving. 8. If the motors stall or do not have sufficient power to move the telescope, place fresh batteries in the battery pack. Long-life alkaline batteries are recommended. #493 Autostar Computer Control System: Attached to any Meade DS telescope, the #493 Autostar Computer Control System permits fully automatic motorized location (at 5/second on both telescope axes) of more than 1400 celestial objects, including the major planets from Mercury to Pluto; all 110 deep-space Messier objects; the finest galaxies, diffuse nebulae, planetary nebulae, and star clusters from the New General Catalog (NGC), the Index Catalog (IC), and the Caldwell catalog; hundreds of stars (double stars, variable stars, SAO stars); 15 periodic comets; 50 earth-orbiting satellites; and more. In addition the Autostar System can perform an automatic GO TO function to any object of known celestial coordinates (Right Ascension and Declination). Enter any of the preceding objects into the Autostar display, press GO TO, and the telescope moves to the object and places it in the telescopic field of view. To install the #493 system: Installation of the #493 system is identical to the procedure described in "To Install the #492 System," page 15, except for step 4c. In this step, the cord from the #493 Autostar Computer Control System plugs into the HBX (handbox) jack (Fig. W). Instructions for the operation of the #493 Autostar Computer Control System are included with the System itself. Important Note: The first time Autostar initializes, it calibrates the motors. If you remove the motors after a viewing session, mark one of the motors so that you remember the orientation of the motors. Use the same orientation in subsequent observing sessions; otherwise Autostar detects what appears to be a motor failure. If this occurs and a motor failure message is displayed, the motors have to be recalibrated.

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Appendix 3: Optional Electronic and Computer Drive Systems Available for Your Meade Digital Electronic Series Telescope
Your Meade DS telescope can be equipped with the latest in high-technology electronic drive systems. These systems attach to Meade DS telescopes in minutes and greatly extend the usefulness and excitement of telescope operation. #490 Manual Slow-Motion Control Set Use the Manual Slow Motion Control Set to manually track astronomical and terrestrial objects through the telescope by turning one or both of the manual control knobs attached to the vertical and horizontal axes of the telescope. Allows manual micrometric slow-motions of the telescope. #492 Dual-Motor Electronic Control System Use the Electronic Control System for pushbutton motions of the telescope on both telescope axes, simultaneously, at any of the drive speeds; very slow, slow, moderate, and fast. Track astronomical and terrestrial objects at the push of a button. The #492 system operates from a small battery pack included with the system, that accepts ten AA-size (user supplied) batteries. #493 Autostar Computer Control System With the Meade Autostar system attached to your telescope, fully automatic astronomical object-location becomes a reality. Bring up the object you want to observe from Autostars 1400-object database on to the Autostar display, press GO TO, and the telescope automatically moves to the object and places it in the telescope field of view! In addition, Autostar enables the telescope to track the object automatically, fully compensating for the earths rotation. Objects seem to stand still as the telescope follows their motions across the sky. Supplied with 2 control motors, battery pack and Autostar #495 handbox. #495 Autostar Handbox Owners of DS telescopes already equipped with the #492 EC System (see above) need only purchase the #495 handbox to convert their telescopes to full Autostar operation. See the description of the #493 Autostar System above for more details. #497 Autostar Handbox Includes all the features of the #495 handbox, but offers a database of over 14,000 objects, including over 5,000 objects from the Index Catalog (IC), 7800 objects from the New General Catalog (NGC), 109 objects from the Caldwell catalog and over 900 stars from the Smithsonian Astrophysical Observatory (SAO). The database also includes all 110 Messier objects, 50 earth-orbiting satellites, 26 asteroids, and 15 periodic comets. For more information on these electronic features, contact your Meade dealer, or send $3.00 to Meade Instruments for a copy of the Meade General Catalog, Information on Meade dealers located near you can be obtained by calling toll-free: 1-800-62MEADE.

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Meade Instruments Corporation
Worlds Leading Manufacturer of Astronomical Telescopes for the Serious Amateur
6001 Oak Canyon, Irvine, California 92618 s (949) 451-1450 FAX: (949) 451-1460 s www.meade.com