Figure 2-6

Hand Control Holder

Leg Clamp

Attaching the Slow Motion Knobs

(For Non-GT Models Only)

The Advanced Series (non-GT models) comes with two slow motion control knobs that allows you to make fine pointing adjustments to the telescope in both R.A. and Declination. To install the knobs: 1. 2. Locate the hard plastic shell under the R.A. shafts. Remove either of the two oval tabs by pulling tightly. Line up the flat area on the inner portion of the R.A. slow motion knob with the flat area on the R.A. shaft (see Fig 2-7). Slide the R.A. slow motion knob onto the R.A. shaft. The knob is a tension fit, so sliding it on holds it in place. As mentioned above, there are two R.A. Figure 2-7 shafts, one on either side of the mount. It makes no difference which shaft you use since both work the same. Use whichever one you find more convenient. If, after a few observing sessions, you find the R.A. slow motion knob is more accessible from the other side, pull firmly to remove the knob, then install it on the opposite side. 5. The DEC slow motion knob attaches in the same manner as the R.A. knob. The shaft that the DEC slow motion knob fits over is toward the top of the mount, just below the telescope mounting platform. Once again, you have two shafts to choose from. Use the shaft that is pointing toward the ground. This makes it easy to reach while looking through the telescope, something which is quite important when you are observing.
Attaching an Optical Tube to the Mount

Advanced GT Users!

An optical tube attaches to the mount via a dovetail bar which mounts along the bottom of a telescope tube. The CG-5 mount comes with a mounting bar that mates to the mounting head of the mount. The mounting bar can be used to attached a desired telescope to the CG-5 mount. Before you attach an optical tube, make sure that the declination and right ascension clutch knobs are tight. This will ensure that the mount does not move suddenly while attaching the telescope. To mount the telescope tube: In order for the GT computerized mount to function properly, before installing an optical tube, the mounting platform must be positioned so that the Declination Index Marks are aligned (see Fig 2-8).

Declination Index Marks

Loosen the mounting screw on the side of the telescope mounting platform. This allows you to slide the dovetail bar onto the mount. Slide the dovetail bar on the telescope tube into the mounting platform of the mount. Tighten the mounting screw on the side of the mounting platform to hold the telescope in place.

Adjusting the Mount in Altitude
To increase the latitude of the polar axis, tighten the rear latitude adjustment screw and loosen the front screw (if necessary). To decrease the latitude of the polar axis, tighten the front (under the counterweight adjustment screw and loosen the rear screw (if necessary).

bar) latitude

The latitude adjustment on the CG-5 mount has a range from approximately 30 going up to 60. It is best to always make final adjustments in altitude by moving the mount against gravity (i.e. using the rear latitude adjustment screw to raise the mount). To do this you should loosen both latitude adjustment screws and manually push the front of the mount down as far as it will go. Then tighten the rear adjustment screw to raise the mount to the desired latitude. For Advanced GT users, it may be helpful to remove the front latitude adjustment screw completely. This will allow the mount to reach lower latitudes without the screw coming into contact with R.A. motor assembly. To remove the latitude screw, first use the rear screw to raise the mount head all the way up. Then remove the front latitude screw completely. Now you should be able to manually move the mount head all the way to it lowest latitude. Rear Latitude Now, using only the rear screw, raise the mount to your desired Adjustment Screws latitude.
Adjusting the Mount in Azimuth
For rough adjustments in azimuth, simply pick up the telescope and tripod and move it. For fine adjustments in azimuth: 1. Turn the azimuth adjustment knobs located on either side of the azimuth housing. While standing behind the telescope, the knobs are on the front of the mount. Turning the right adjustment knob clockwise moves the mount toward the right. Turning the left adjustment knob clockwise moves the mount to the left.
Front Latitude Adjustment Screw Azimuth Adjustment Knobs

Figure 2-14

Both screws push off of the peg on the tripod head, which means you may have to loosen one screw while tightening the other. The screw that holds the equatorial mount to the tripod may have to be loosened slightly. Keep in mind that adjusting the mount is done during the polar alignment process only. Once polar aligned, the mount must NOT be moved. Pointing the telescope is done by moving the mount in right ascension and declination, as described earlier in this manual.

Attaching the Declination Cables (For GT Models Only)
The Advanced Series mount comes with a declination cable that connects from the R.A. motor drive electronic panel to the Dec motor drive. To attach the motor cables:
Locate the Declination cable and plug one end of the cable into the port on the electronics panel labeled DEC Port and plug the other end of the cable into the port located on the declination motor drive (see Fig 2-15).
Declination Cable Input Port

Powering the Telescope

The Advanced GT can be powered by the supplied car battery adapter or optional 12v AC adapter. Use only adapters supplied by Celestron. Using any other adapter may damage the electronics and will void your manufacturer's warranty.

Figure 2-15

Declination Cable Output Port 12v Power Input On/Off Switch
To power the telescope with the car battery adapter (or 12v AC adapter), simply plug the round post into the 12v outlet on the electronic panel and plug the other end into your cars cigarette lighter outlet or portable power supply (see Optional Accessories). Note: to prevent the power cord from being accidentally pulled out, wrap the power cord around the strain relief located below the power switch.
2. Turn on the power to the telescope by flipping the switch, located on the electronics panel, to the "On"

position.

The following is a supplemental addendum to the included instruction manual that explains the new features of Celestron's Advanced Series Telescopes. Please refer to this addendum for information concerning the new hand control features included with your telescope. Refer to the owner's manual for step-by-step instruction on assembling and using your telescope. The Advanced Series GT, computerized version of each telescope has a hand controller designed to give you instant access to all the functions that your telescope has to offer. With automatic slewing to over 40,000 objects, and common sense menu descriptions, even a beginner can master its variety of features in just a few observing sessions. Below is a brief description of the individual components of the computerized hand controller: 1. Liquid Crystal Display (LCD) Window: Has a dual-line, 16 character display screen that is backlit for comfortable viewing of telescope information and scrolling text. 2. Align: Instructs the telescope to use a selected star or object as an alignment position. Keys: Allows 3. Direction complete control of the telescope in any direction. Use the direction keys to move the telescope to the initial alignment stars or for centering objects in the eyepiece.
Figure 3-1 The Advanced GT Hand Control

4. Catalog Keys: The Advanced Series has keys on the hand control to allow direct access to each of the catalogs in its database. The hand control contains the following catalogs in its database: Messier Complete list of all Messier objects. NGC Complete list of all the deep-sky objects in the Revised New General Catalog. Caldwell A combination of the best NGC and IC objects. Planets - All 8 planets in our Solar System plus the Moon. Stars A compiled list of the brightest stars from the SAO catalog. List For quick access, all of the best and most popular objects in the Advanced GT database have been broken down into lists based on their type and/or common name: Named Stars Common name listing of the brightest stars in the sky. Named Objects Alphabetical listing of over 50 of the most popular deep sky objects. Numeric-alphabetical listing of the most Double Stars visually stunning double, triple and

Variable Stars

Asterisms CCD Objects
IC Objects Abell Objects Constellation
quadruple stars in the sky. Select list of the brightest variable stars with the shortest period of changing magnitude. A unique list of some of the most recognizable star patterns in the sky. A custom list of many interesting galaxy pairs, trios and clusters that are well suited for CCD imaging with the Advanced GT telescope. A complete list of all the Index Catalog deep-sky objects. A custom list of the Abell Catalog deepsky galaxies. A complete list of all 88 constellations.
5. Info: Displays coordinates and useful information about objects selected from the Advanced GT database. 6. Tour: Activates the tour mode, which seeks out all the best objects for the current date and time, and automatically slews the telescope to those objects. 7. Enter: Pressing Enter allows you to select any of the Advanced GT functions and accept entered parameters. 8. Undo: Undo will take you out of the current menu and display the previous level of the menu path. Press Undo repeatedly to get back to a main menu or use it to erase data entered by mistake. 9. Menu: Displays the many setup and utilities functions such as tracking rates and user defined objects and many others. 10. Scroll Keys: Used to scroll up and down within any of the menu lists. A doublearrow will appear on the right side of the LCD when there are sub-menus below the displayed menu. Using these keys will scroll through those sub-menus. 11. Rate: Instantly changes the rate of speed of the motors when the direction buttons are pressed. 12. RS-232 Jack: Allows you to interface with a computer and control the telescope remotely.

Last Alignment The Last Alignment method will automatically recall the last stored index positions to continue using the alignment that was saved when the telescope was last powered down. This is a useful feature should your telescope accidentally lose power or be powered down. NOTE: Just like with Quick-Align, you can use the Alignment Stars or Sync feature (see below) to improve your telescopes pointing accuracy after using the Last Alignment method. If the mount has not moved since the previous alignment then it is recommended to use Sync to improve the pointing accuracy of your mount. However, if the mount has been moved then changing alignment stars is the best way to re-align your mount. To maintain a more accurate alignment over a series of observing sessions, use the Hibernate feature described later in this chapter.
Improving Pointing Accuracy
The Advanced Series telescopes have several options that allow you to improve the pointing accuracy of your mount in a variety of ways.

Alignment Stars:

Alignment stars allows you to replace any of the original alignment stars with a new star or celestial object. This can be useful if you have aligned your telescope using the Quick-Align method. You can add alignment stars to align the telescope on actual objects in the sky. This will improve the pointing accuracy of your telescope without having to re-enter addition information. To replace an existing alignment star with a new alignment star: Select the desired star (or object) from the database and slew to it. Once centered, press the UNDO button until you are at the main menu. With Advanced GT displayed, press the ALIGN key on the hand control. Use the Up/Down buttons and select the Alignment Stars option and press ENTER. The display will then ask you which alignment star you want to replace. Use the UP and Down scroll keys to select the alignment star to be replaced and press ENTER. It is usually best to replace the star closest to the new object. This will space out your alignment stars across the sky. 6. Align the star in the center of the finderscope and press ENTER. 7. Carefully center the object in the center of the eyepiece and press ALIGN 1. 2. 3. 4. 5.

Calibration Stars:

Helpful Hint

Slewing to an Object
Once the desired object is displayed on the hand control screen, choose from the following options:
Press the INFO Key. This will give you useful information about the selected object such as R.A. and declination, magnitude size and text information for many of the most popular objects. Press the ENTER Key. This will automatically slew the telescope to the coordinates of the object.
Caution: Never slew the telescope when someone is looking into the eyepiece. The telescope can move at fast slew speeds and may hit an observer in the eye.
Object information can be obtained without having to do a star alignment. After the telescope is powered on, pressing any of the catalog keys allows you to scroll through object lists or enter catalog numbers and view the information about the object as described above.

Finding Planets

Your telescope can locate all 8 of our solar systems planets plus the Moon. However, the hand control will only display the solar system objects that are above the horizon (or within
its filter limits). To locate the planets, press the PLANET key on the hand control. The hand control will display all solar system objects that are above the horizon:
Use the Up and Down keys to select the planet that you wish to observe. Press INFO to access information on the displayed planet. Press ENTER to slew to the displayed planet.

Tour Mode

The Advanced Series telescopes include a tour feature which automatically allows the user to choose from a list of interesting objects based on the date and time in which you are observing. The automatic tour will display only those objects that are within your set filter limits (see Filter Limits in the Setup Procedures section of the manual). To activate the Tour mode, press the TOUR key (6) on the hand control. The hand control will display the best objects to observe that are currently in the sky.
To see information and data about the displayed object, press the INFO key. To slew to the object displayed, press ENTER. To see the next tour object, press the Up key.

Constellation Tour

EQ North

Used to track the sky when the telescope is polar aligned in the Northern Hemisphere. Used to track the sky when the telescope is polar aligned in the Southern Hemisphere. When using the telescope for terrestrial (land) observation, the tracking can be turned off so that the telescope never moves.

EQ South

Tracking Rate
In addition to being able to move the telescope with the hand control buttons, your telescope will continually track a celestial object as it moves across the night sky. The tracking rate can be changed depending on what type of object is being observed:

Sidereal

This rate compensates for the rotation of the Earth by moving the telescope at the same rate as the rotation of the Earth, but in the opposite direction. When the telescope is polar aligned, this can be accomplished by moving the telescope in right ascension only. Used for tracking the moon when observing the lunar landscape. Used for tracking the Sun when solar observing with the proper filter.
View Time-Site - Displays the current time and longitude/latitude downloaded from the optional CN-16 GPS receiver. It will also display other relevant time-site information like time zone, daylight saving and local sidereal time. Local sidereal time (LST) is useful for knowing the right ascension of celestial objects that are located on the Meridian at that time. View Time-Site will always display the last saved time and location entered while it is linking with the GPS. Once current information has been received, it will update the displayed information. If GPS is switched off or not present, the hand control will only display the last saved time and location.
User Defined Objects - Your telescope can store over 100 different user defined objects in its
memory (99 sky objects and 9 land objects). The objects can be daytime land objects or an interesting celestial object that you discover that is not included in the regular database. There are several ways to save an object to memory depending on what type of object it is: GoTo Object: To go to any of the user defined objects stored in the database, scroll down to either GoTo Sky Obj or Goto Land Obj and enter the

number of the object you wish to select and press ENTER. The telescope will automatically retrieve and display the coordinates before slewing to the object. Save Sky Object: Your telescope stores celestial objects to its database by saving its right ascension and declination in the sky. This way the same object can be found each time the telescope is aligned. Once a desired object is centered in the eyepiece, simply scroll to the "Save Sky Save Obj" command and press ENTER. The display will ask you to enter a number between 1-99 to identify the object. Press ENTER again to save this object to the database. This feature allows you to create your own custom tour of database objects by allowing you to record the current position of the telescope and save the name of the object by selecting it from any one of the database catalogs. These objects then can be accessed by selecting GoTo Sky Object. You can also store a specific set of coordinates for an object just by entering the R.A. and declination for that object. Scroll to the "Enter RA-DEC " command and press ENTER. The display will Enter RAthen ask you to enter first the R.A. and then the declination of the desired object. The telescope can also be used as a spotting scope on terrestrial objects. Fixed land objects can be stored by saving their altitude and azimuth relative to the location of the telescope at the time of observing. Since these objects are relative to the location of the telescope, they are only valid for that exact location. To save land objects, once again center the desired object in the eyepiece. Scroll down to the "Save Land Obj command and press ENTER. The Obj" Save display will ask you to enter a number between 1-9 to identify the object. Press ENTER again to save this object to the database.
Save Database (Db) Object:

Enter R.A. - Dec:

Save Land Object:
To replace the contents of any of the user defined objects, simply save a new object using one of the existing identification numbers; the telescope will replace the previous user defined object with the current one.
Get RA/DEC - Displays the right ascension and declination for the current position of the

telescope.

Goto R.A/ Dec - Allows you to input a specific R.A. and declination and slew to it.
To store a set of coordinates (R.A./Dec) permanently into the database, save it as a User Defined Object as described above.

Fig 3-3 R.A limits- This figure shows the full range of motion for the R.A. axis

Observing Tip!

If you want to explore the entire object database, set the maximum altitude limit to 90 and the minimum limit to 90. This will display every object in the database lists regardless of whether it is visible in the sky from your location.
Direction Buttons The direction a star appears to move in the eyepiece changes depending on
which side of the Meridian the telescope tube is on. This can create confusion especially when guiding on a star when doing astrophotography. To compensate for this, the direction of the drive control keys can be changed. To reverse the button logic of the hand control, press the MENU button and select Direction Buttons from the Utilities menu. Use the Up/Down arrow keys (10) to select either the Declination (north and south) or Right Ascension (east and west) button directions and press ENTER. Select either positive or negative for both axes and press ENTER to save. Setting the azimuth button direction to positive will move the telescope in the same direction that the telescope tracks (i.e. towards the west). Setting the altitude buttons to positive will move the telescope counterclockwise along the DEC axis.
Goto Approach - lets the user define the direction that the telescope will approach when
slewing to an object. This allows the user the ability to minimize the affects of backlash when slewing from object to object. Just like with Direction Buttons, setting GoTo Approach to positive will make the telescope approach an object from the same direction as tracking (west) for Right Ascension (RA) and counterclockwise in declination. Declination Goto approach will only apply while the telescope tube is on one side of the Meridian. Once the tube passes over to the other side of the Meridian, the Goto approach will need to be reversed. To change the Goto approach direction, simply choose Goto Approach from the Scope Setup menu, select either Altitude or Azimuth approach, choose positive or negative and press ENTER. In order to minimize the affect of gear backlash on pointing accuracy, the settings for Button Direction should ideally match the settings for GoTo Approach. By default, using the up and right direction buttons to center alignment stars will automatically eliminate much of the backlash in the gears. If you change the Goto approach of your telescope it is not necessary to change the Button Direction as well. Simply take notice of the direction the telescope moves when completing it final goto approach. If the telescope approaches its alignment star from the west (negative azimuth) and clockwise (negative altitude) then make sure that the buttons used to center the alignment stars also move the telescope in the same directions.

Latitude Scales The easiest way to polar align a telescope is with a latitude scale. Unlike other methods that require you to find the celestial pole by identifying certain stars near it, this method works off of a known constant to determine how high the polar axis should be pointed. The Advanced Series mount can be adjusted from 30 to 60 degrees (see figure 5-3). The constant, mentioned above, is a relationship between your latitude and the angular distance the celestial pole is above the northern (or southern) horizon; The angular distance from the northern horizon to Latitude the north celestial pole is always equal to Scale your latitude. To illustrate this, imagine that you are standing on the north pole, latitude +90. The north celestial pole, which has a declination of +90, would be directly Figure 5-3 overhead (i.e., 90 above the horizon). Now, lets say that you move one degree south your latitude is now +89 and the celestial pole is no longer directly overhead. It has moved one degree closer toward the northern horizon. This means the pole is now 89 above the northern horizon. If you move one degree further south, the same thing happens again. You would have to travel 70 miles north or south to change your latitude by one degree. As you can see from this example, the distance from the northern horizon to the celestial pole is always equal to your latitude. If you are observing from Los Angeles, which has a latitude of 34, then the celestial pole is 34 above the northern horizon. All a latitude scale does then is to point the polar axis of the telescope at the right elevation above the northern (or southern) horizon. To align your telescope: 1. Make sure the polar axis of the mount is pointing due north. Use a landmark that you know faces north. 2. Level the tripod. There is a bubble level built into the mount for this purpose.
NOTE: Leveling the tripod is only necessary if using this method of polar alignment. Perfect polar alignment is still possible using other methods described later in this manual without leveling the tripod.
3. Adjust the mount in altitude until the latitude indicator points to your latitude. Moving the mount affects the angle the polar axis is pointing. For specific information on adjusting the equatorial mount, please see the section Adjusting the Mount. This method can be done in daylight, thus eliminating the need to fumble around in the dark. Although this method does NOT put you directly on the pole, it will limit the number of corrections you will make when tracking an object. It will also be accurate enough for short exposure prime focus planetary photography (a couple of seconds) and short exposure piggyback astrophotography (a couple of minutes). Pointing at Polaris This method utilizes Polaris as a guidepost to the celestial pole. Since Polaris is less than a degree from the celestial pole, you can simply point the polar axis of your telescope at Polaris. Although this is by no means perfect alignment, it does get you within one degree. Unlike the previous method, this must be done in the dark when Polaris is visible. 1. Set the telescope up so that the polar axis is pointing north. 2. Loosen the DEC clutch knob and move the telescope so that the tube is parallel to the polar axis. When this is done, the declination setting circle will read +90. If the declination setting circle is not aligned, move the telescope so that the tube is parallel to the polar axis. 3. Adjust the mount in altitude and/or azimuth until Polaris is in the field of view of the finder. 4. Center Polaris in the field of the telescope using the fine adjustment controls on the mount. Remember, while Polar aligning, do NOT move the telescope in R.A. or DEC. You do not want to move the telescope itself, but the polar axis. The telescope is used simply to see where the polar axis is pointing. Like the previous method, this gets you close to the pole but not directly on it. The following methods help improve your accuracy for more serious observations and photography.

Finding the North Celestial Pole
In each hemisphere, there is a point in the sky around which all the other stars appear to rotate. These points are called the celestial poles and are named for the hemisphere in which they reside. For example, in the northern hemisphere all stars move around the north celestial pole. When the telescope's polar axis is pointed at the celestial pole, it is parallel to the Earth's rotational axis. Many methods of polar alignment require that you know how to find the celestial pole by identifying stars in the area. For those in the northern hemisphere, finding the celestial pole is not too difficult. Fortunately, we have a naked eye star less than a degree away. This star, Polaris, is the end star in the handle of the Little Dipper. Since the Little Dipper (technically called Ursa Minor) is not one of the brightest constellations in the sky, it may be difficult to locate from urban areas. If this is the case, use the two end stars in the bowl of the Big Dipper (the pointer stars). Draw an imaginary line through them toward the Little Dipper. They point to Polaris (see Figure 5-5). The position of the Big Dipper changes during the year and throughout the course of the night (see Figure 5-4). When the Big Dipper is low in the sky (i.e., near the horizon), it may be difficult to locate. During these times, look for Cassiopeia

Definition

Figure 5-4 The position of the Big Dipper changes throughout the year and the night.
(see Figure 5-5). Observers in the southern hemisphere are not as fortunate as those in the northern hemisphere. The stars around the south celestial pole are not nearly as bright as those around the north. The closest star that is relatively bright is Sigma Octantis. This star is just within naked eye limit (magnitude 5.5) and lies about 59 arc minutes from the pole.
The north celestial pole is the point in the northern hemisphere around which all stars appear to rotate. The counterpart in the southern hemisphere is referred to as the south celestial pole.

Method

This allows you alignment required if exposure through
Declination Drift of Polar Alignment
method of polar alignment to get the most accurate Figure 5-5 on the celestial pole and is The two stars in the front of the bowl of the Big Dipper point to Polaris which is less you want to do long than one degree from the true (north) celestial pole. Cassiopeia, the W shaped deep-sky astrophotography constellation, is on the opposite side of the pole from the Big Dipper. The North the telescope. The Celestial Pole (N.C.P.) is marked by the + sign. declination drift method requires that you monitor the drift of selected stars. The drift of each star tells you how far away the polar axis is pointing from the true celestial pole and in what direction. Although declination drift is simple and straight-forward, it requires a great deal of time and patience to complete when first attempted. The declination drift method should be done after any one of the previously mentioned methods has been completed. To perform the declination drift method you need to choose two bright stars. One should be near the eastern horizon and one due south near the meridian. Both stars should be near the celestial equator (i.e., 0 declination). You will monitor the drift of each star one at a time and in declination only. While monitoring a star on the meridian, any misalignment in the east-west direction is revealed. While monitoring a star near the east/west horizon, any misalignment in the north-south direction is revealed. It is helpful to have an illuminated reticle eyepiece to help you recognize any drift. For very close alignment, a Barlow lens is also recommended since it increases the magnification and reveals any drift faster. When looking due south, insert the diagonal so the eyepiece points straight up. Insert the cross hair eyepiece and align the cross hairs so that one is parallel to the declination axis and the other is parallel to the right ascension axis. Move your telescope manually in R.A. and DEC to check parallelism. First, choose your star near where the celestial equator and the meridian meet. The star should be approximately within 1/2 an hour of the meridian and within five degrees of the celestial equator. Center the star in the field of your telescope and monitor the drift in declination. If the star drifts south, the polar axis is too far east. If the star drifts north, the polar axis is too far west.

Make the appropriate adjustments to the polar axis to eliminate any drift. Once you have eliminated all the drift, move to the star near the eastern horizon. The star should be 20 degrees above the horizon and within five degrees of the celestial equator. If the star drifts south, the polar axis is too low. If the star drifts north, the polar axis is too high.
Again, make the appropriate adjustments to the polar axis to eliminate any drift. Unfortunately, the latter adjustments interact with the prior adjustments ever so slightly. So, repeat the process again to improve the accuracy checking both axes for minimal drift. Once the drift has been eliminated, the telescope is very accurately aligned. You can now do prime focus deep-sky astrophotography for long periods. NOTE: If the eastern horizon is blocked, you may choose a star near the western horizon, but you must reverse the polar high/low error directions. Also, if using this method in the southern hemisphere, the direction of drift is reversed for both R.A. and DEC.
CELESTRON TWO YEAR WARRANTY
A. Celestron warrants this telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. As a condition to the obligation of Celestron to repair or replace such product, the product must be returned to Celestron together with proof-of-purchase satisfactory to Celestron. The Proper Return Authorization Number must be obtained from Celestron in advance of return. Call Celestron at (310) 328-9560 to receive the number to be displayed on the outside of your shipping container. All returns must be accompanied by a written statement setting forth the name, address, and daytime telephone number of the owner, together with a brief description of any claimed defects. Parts or product for which replacement is made shall become the property of Celestron. The customer shall be responsible for all costs of transportation and insurance, both to and from the factory of Celestron, and shall be required to prepay such costs. Celestron shall use reasonable efforts to repair or replace any telescope covered by this warranty within thirty days of receipt. In the event repair or replacement shall require more than thirty days, Celestron shall notify the customer accordingly. Celestron reserves the right to replace any product which has been discontinued from its product line with a new product of comparable value and function. This warranty shall be void and of no force of effect in the event a covered product has been modified in design or function, or subjected to abuse, misuse, mishandling or unauthorized repair. Further, product malfunction or deterioration due to normal wear is not covered by this warranty. CELESTRON DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE, EXCEPT AS EXPRESSLY SET FORTH HEREIN. THE SOLE OBLIGATION OF CELESTRON UNDER THIS LIMITED WARRANTY SHALL BE TO REPAIR OR REPLACE THE COVERED PRODUCT, IN ACCORDANCE WITH THE TERMS SET FORTH HEREIN. CELESTRON EXPRESSLY DISCLAIMS ANY LOST PROFITS, GENERAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES WHICH MAY RESULT FROM BREACH OF ANY WARRANTY, OR ARISING OUT OF THE USE OR INABILITY TO USE ANY CELESTRON PRODUCT. ANY WARRANTIES WHICH ARE IMPLIED AND WHICH CANNOT BE DISCLAIMED SHALL BE LIMITED IN DURATION TO A TERM OF TWO YEARS FROM THE DATE OF ORIGINAL RETAIL PURCHASE. Some states do not allow the exclusion or limitation of incidental or consequential damages or limitation on how long an implied warranty lasts, so the above limitations and exclusions may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Celestron reserves the right to modify or discontinue, without prior notice to you, any model or style telescope. If warranty problems arise, or if you need assistance in using your telescope contact: Celestron Customer Service Department 2835 Columbia Street Torrance, CA 90503 U.S.A. Tel. (310) 328-9560 Fax. (310) 212-5835 Monday-Friday 8AM-4PM PST This warranty supersedes all other product warranties. NOTE: This warranty is valid to U.S.A. and Canadian customers who have purchased this product from an Authorized Celestron Dealer in the U.S.A. or Canada. Warranty outside the U.S.A. and Canada is valid only to customers who purchased from a Celestron Distributor or Authorized Celestron Dealer in the specific country and please contact them for any warran