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Nikon N4004S

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Nikon N4004SProfessional Horizontal Vertical 180 Degree Flash Bracket with Nikon SC-28 Replacement Off Camera TTL Flash Cord for The Nikon F100 F90 F90X F80 F75 F70 F6 F5 F4-Series N8008 N8008S N6000 N6006 N4004S N2020 N2000 F401S N90x N90S N90 N80 N80QD N75 N75QD N70 N65 N65QD N60 N55 N50 Pronea 600i Pronea 6i Pronea S

Nikon - Hot-shoe

Loosen the clamping screw shoe, slide flash into mount and tighten snugly. Connect flash to camera with Off-Camera Shoe I-TTL Synch Cord ( included ). For horizontal shooting, the flash arm stays in the down position. The separation between your lens and the flash eliminates red-eye and softens shadows. For vertical format. rotate the flash arm 180 degrees. The flash will be repositioned to again be centered high above the lens. BRACKET FEATURES * Eliminates Red Eye * Effectively eliminates hars... Read more

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UPC: 084686326548

 

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doc1

SB-25_En

03.1.14 8:18 PM

Page 1

Autofocus Speedlight

Instruction Manual

Page 2

FOREWORD

Thank you for purchasing the Nikon Autofocus Speedlight SB-25. Used with Nikons newest SLRs (F90-Series/N90, F4-Series, F-801/N8008, F-801s/N8008s, F-601/N6006, F-601M/N6000, F-401x/N5005, F-401/N4004 and F-401s/ N4004s), it offers you the most advanced and complete system for automatic flash photography available. To get the maximum performance from your new SB-25, be sure to take time to read the instruction manual carefully.
For Effective Use of This Manual
Using this manual is simple. Read the pages with shaded index tabs indicating your camera name. These index tabs lead you to all of the information you need to learn about using the SB-25 with your camera. The SB-25 and todays newest Nikon models offer exceptionally high performance. They include more features than ever before, all of which can help you make great pictures. Because there are so many features, the instruction manual is extensive, and may seem a little intimidating. We urge you, however, to thoroughly read the manuals before you begin using the SB-25. That way you will be fully familiar with the features and the way they work. For the convenience of latest Nikon SLR users, the SB-25 offers automatic adjustment functions when used with certain lenses. Automatic operations is detailed beside manual operation in shaded boxes with mark. By becoming thoroughly familiar with the SB-25, you will be able to use its advanced features more effectively and enjoy great results from the very beginning.
F90-Series/N90 Users F4-Series, F-801/N8008 and F-801s/N8008s Users F-601/N6006 and F-601M/N6000 Users F-401x/N5005 Users F-501/N2020 and F-301/N2000 Users F-401/N4004 and F-401s/N4004s Users FA, FE2, FG and Nikonos V Users
The Nikon N90, N8008, N8008s, N6006, N6000, N5005, N4004 and N4004s are sold exclusively in the U.S.A. The Nikon N2020 and N2000 are sold exclusively in the U.S.A. and Canada.
F3-Series, F2-Series, FM2 and FG-20 Users

Page 4

Table Of Contents
For Effective Use of This Manual..2 Table of Contents..Adjustment Functions Using LCD Panel and Built-in Functions..Adjusting Flash Head To Horizontal/ Front Position..Using LCD Panel For ShootingDistance Computation.Setting ISO Film Speed (Manual Adjustment).Setting Aperture Value (Manual Adjustment).Setting Zoom-Head Position (Manual Adjustment).Mode Shooting Non-TTL Auto Flash with Varied Lens Apertures..Manual Flash Mode Manual LightOutput Control..Synchronization in Continuous Shooting.89 Repeating Flash Mode For Multiple Exposure...Guide Number To Calculate a Proper Aperture..118 Diffusing Light To Soften Harsh Shadow...Bounce Flash Photography..122 Using a Diffuser..123 Close-Up Flash Photography in TTL Auto Flash Mode To Flash On A Very Close Subject..Multiple Flash Photography Using More Than One Speedlights..TTL Multiple Flash Photography.Manual Multiple Flash Photography.129 System Chart for TTL Multiple Flash.Accessories for TTL Multiple Flash.132
Chapter 1: Introducing the SB-25 Autofocus Speedlight
Nomenclature...Main Features/Functions SB-25s Flash Capabilities..Fully Automatic Fill Flash..Automatic Balanced Fill-Flash..11 TTL Multi-Sensor Automatic Balanced Fill-Flash With F90-Series/N90.12 FP High-Speed Sync Flash..Rear-Curtain Sync Flash...15 Red-Eye Reduction Control..16 Repeating Flash...16 SB-25 Feature Comparison: Flash Operations Available with Your Camera..17
Chapter 4: Flash-Shooting Applications
FP High-Speed Sync Flash Flash Photography At Higher Shutter Speeds..Guide number in FP High-Speed Sync Flash..Red-Eye Reduction Control For Better Flash Portraits...104 Rear-Curtain Sync Flash For Natural Light Flows...105 Flash Exposure Compensation To Make FlashIlluminated Subject Lighter or Darker.Exposure Compensation with Cameras Dial To Make Background Lighter or Darker.Open Flash Button For Test Firing.110 Built-In Wide Flash Adapter For Shorter Focal-Length Lenses..111 Zoom-Lock Capability To Fix Zoom-Head Position..Trouble With Wide Flash Adapter..113 AF Assist LED Autofocus Flash Photography in Dim Light..Power Switch Standby (STBY) Position To Conserve Energy and Shorten Recycling Time..116 117
Chapter 3: Shooting Practice in Flash Modes
TTL Auto Flash Mode Fill-Flash with Automatically Compensated Flash Output.For F90-Series/N90 Camera Users: Choosing A Flash Method/Set Up and Practice.For F4-Series, F-801/N8008 and F-801s/N8008s Users: Choosing A Flash Method/Set Up and Practice.For F-601/N6006 and F-601M/N6000 Users: Choosing A Flash Method/Set Up and Practice.For F-401x/N5005 Users: Choosing A Flash Method/Set Up and Practice.For F-501/N2020 and F-301/N2000 Users: Choosing A Flash Method/Set Up and Practice.For F-401/N4004 and F-401s/N4004s Users: Choosing A Flash Method/Set Up and Practice.For FA, FE2, FG and Nikonos V Users: Choosing A Flash Method/Set Up and Practice.76 79

SB-25 sync flash

Y Light output Y Y X: Y: : : 1: F R Time duration Shutter curtain movement Front-curtain movement Rear-curtain movement Film surface is exposed to flash light throughout the entire duration. 2: Film surface is exposed to flash light for only part of the time that the curtain are open. A slow shutter speed could create light flow from a moving subject. Rear-Curtain Sync Flash catches him/her with natural-looking light stream. 15
X 1 FP High-Speed Sync Flash Front-curtain sync flash
X 2 Rear-curtain sync flash

Page 16

Red-Eye Reduction Control
Red eye effect occurs in flash photography when flash pictures are taken in dim surroundings where the subjects eye pupils will be dilated (opened very wide). Light from the cameras flash reflects off the interior of the eye through the wide-open pupil and back into the cameras lens; the result in the photo appears as bright red eyes. The SB-25 fires three consecutive flash prior to the main flash. This causes the subjects pupils to constrict (become smaller), reducing the appearance of red-eye. The F90-Series/N90 offers this exclusive Red-Eye Reduction Control to control preflash, for use in any flash mode, except Repeating Flash mode. For more details and setting operation, see page 104, and the cameras instruction manual. Red-eye effect can also be controlled by the angle at which light strikes the subject and is reflected back to the cameras lens. For further details, see Red Eye, page 134.

Repeating Flash

When used with any Nikon SLR, the SB-25 is capable of strobo-effect multiple flash exposure at up to 160 flash per frame; it also allows control of the amount of flash light output. Operation becomes simple once you learn how to match the number and speed of flash to your desired shutter speed. For details, see Repeating Flash Mode For Multiple Exposure, pages 90 to 95.
SB-25 Feature Comparison: Flash Operations Available with Your Camera
F9 0S F4 er -S ies F- erie /Ns F- /N F- s/ N1 F- /N 60 s F- M/ N6 1x 00 F50 /NF- /N 20 1/ 20 F- N F- /N 40 1s 04 FA / N FE s 2 FG pa ge s
Repeating flash mode offers strobo effect, multiple exposure on a single frame. 16
TTL Auto Flash 3D Multi-Sensor Balanced Fill-Flash Multi-Sensor Balanced Fill-Flash Matrix Balanced Fill-Flash Center-Weighted Fill-Flash Spot Fill-Flash Programmed TTL Auto Flash Standard TTL Flash Non-TTL Auto Flash Manual Flash Repeating Flash (strobo effect) FP High-Speed Sync Flash Red-Eye Reduction Control Rear-Curtain Sync Flash Flash Exposure Compensation Open Flash Button (test firing) Built-in Wide Flash Adapter Zoom-Lock Capability AF Assist LED Standby Position (power switch) Bounce Flash (built-in diffuser card) Close-up Photography (TTL Auto Flash) Multiple Flash Photography

Lens in Use 1) Cameras Metering System Cameras Exposure Mode Programmed auto (P, Ps) 4) D-Type Shutter-priority auto (S) AF Nikkor Aperture-priority auto (A) Lenses Manual (M) Programmed auto (P, Ps) 4) AF Nikkor Shutter-priority auto (S) lenses 2) AI-P lens- Aperture-priority auto (A) es Manual (M) Other lenses 3) Aperture-Priority auto (A) 5) Manual (M) 3D Multi-Sensor Balanced Fill-Flash Matrix CenterWeighted Spot
Multi-Sensor Balanced Fill-Flash
Center-Weighted Fill-Flash

Spot FillFlash

Flash Methods in TTL Auto Flash Mode 3D Multi-Sensor Balanced Fill-Flash Multi-Sensor Balanced Fill-Flash Center-Weighted Fill-Flash Spot Fill-Flash Standard TTL Flash
1) Suitable lenses and use depend on camera; see instruction manual for information. 2) Except D-Type and AF Nikkor lenses for F3AF. 3) You can not use the Ps mode as the shutter locks. 4) Only 3D Multi-Sensor Balanced or Multi-Sensor Balanced Fill-Flash can be button cannot be performed; Standard TTL Flash is not available and the used. 5) Exposure mode (P or S) automatically shifts to aperture-priority auto (A), and the mode indication blinks in the cameras LCD panel; set desired aperture manually.

Page 34

Chapter 3 TTL Auto Flash Mode: For F90-Series/N90 Users

Set Up and Practice

Some operations can be controlled automatically when the camera is used with an AF Nikkor lens (including the latest D-Type) or Nikkor lens having a built-in CPU. In other cases, operate manually. The following instructions describe a situation where you are using either a D-type Nikkor to operate 3D Multi-Sensor Balanced Fill-Flash, or an AF Nikkor (except for F3AF) or AIP lens to operate Multi-Sensor Balanced Fill-Flash. With other lenses, Center-Weighted or Spot Fill-Flash will be performed. Before proceeding: ATTACH SPEEDLIGHT TO CAMERA. TURN ON BOTH SPEEDLIGHT AND CAMERA. USE SINGLE-SERVO AUTOFOCUS (S) OR MANUAL FOCUS (M). USE SINGLE-FRAME SHOOTING (S) FILM ADVANCE MODE.

Setting Up SB-25

One of these marks appears for fully automatic fill-flash; both disappear for Standard TTL Flash

2 Flash mode

selector at TTL Auto

Press the

button.

3. Flash sync

mode selector at NORMAL

speed of film in use

To perform 3D Multi-Sensor Balanced or Multi-Sensor Balanced Fill-Flash, confirm appears in the LCD panel. To perform Center-Weighted or Spot Fill-Flash, confirm appears. To perform Standard TTL Flash, press the button so that both and disappears. Choose LCD panel. (flash mode selector). Confirm in the

selecting flash method

Choose position (flash sync mode selector). position is used for Rear-Curtain Sync Flash (see page 105).

5 Aperture

Automatic aperture/zoom-head adjustment: AF Nikkor lens (including the latest D-Type) or Nikkor lens having a built-in CPU The aperture and zoom-head position in use are automatically set and indicated in the SB-25s LCD panel. For other lenses, set manually according to the shooting situation. See Setting Aperture Value (Manual Adjustment), pages 28 and 29, and Setting Zoom-Head Position (Manual Adjustment), pages 29 and 30.
Remote TTL Auto Flash operation The optional SC-17 cord enables you to use the SB-25 off-camera. When performing 3D Multi-Sensor Balanced FillFlash, remote operation of the SB-25 works properly only if the SB-25 is placed at a distance and angle similar to the camera-to-subject distance/angle. For other situations, switch to a flash method other than 3D Multi-Sensor Balanced Fill-Flash.
value and zoom-head position
Confirm the ISO film speed has been set and appears in the SB-25s LCD panel (automatic ISO film speed adjustment). If not shown in the LCD panel, lightly press the cameras shutter release button. Confirm the aperture value chosen on the camera and zoom-head position have been set and appear in the SB-25s LCD panel (automatic aperture/zoom-head adjustment).

Page 36

Chapter 3 TTL Auto Flash
Setting Up Your Camera Confirming Settings
Select one of the following exposure modes: a. Programmed auto (P or Ps) b. Shutter-priority auto (S) c. Aperture-priority auto (A) d. Manual exposure mode (M) Select a metering system: a. Matrix metering system b. Center-Weighted metering system c. Spot metering system
Perform other settings: a. For programmed auto, set lens to minimum aperture (highest f-number). b. For shutter-priority auto, set lens to minimum aperture (highest f-number), then set desired shutter speed*. c. For aperture-priority auto, set desired aperture. d. For manual exposure mode, set desired shutter speed* and aperture.
* Camera automatically shifts to the fastest synchronization speed if you choose a speed that is not within the synchronization range.
Selecting an exposure-metering system on the F90Series/N90 camera Either 3D Multi-Sensor Balanced or Multi-Sensor Balanced Fill-Flash will operate regardless of exposure meter system chosen, when the camera is used with a Dtype Nikkor, an AF Nikkor (except for F3AF) or an AI-P lens. Choose a meter to measure background exposure that most effectively meets the photo requirements you wish to achieve.

Page 40

Chapter 3 TTL Auto Flash Mode: For F4-Series, F-801/N8008 and F-801s/N8008s Users
The SB-25 enables you to perform the following flash methods. They are described in detail on pages 10 to 13. Matrix Balanced Fill-Flash Center-Weighted Fill-Flash Spot Fill-Flash (not available with the F4-Series or F-801/N8008) Standard TTL Flash Use the chart at right to confirm which flash method you will perform with your camera, the lens in use and the metering system set on the camera. In most cases, the lens/meter combination determines the flash method. In other cases, you may have to switch metering systems, change lenses, or both. By using the SB-25s button, you can also choose Standard TTL Flash, regardless of lens type. For practice, read Set Up and Practice, from page 42 on. Flash Methods: F4-Series Settings and Lenses
Lens in Use 1) (with MultiFinder DP-20) 2) Cameras Metering System Cameras Exposure Mode Matrix Programmed auto (P, PH) Shutter-priority auto (S) Aperture-priority auto (A) Manual (M) CenterWeighted Lens in Use 1) Spot Programmed auto (PD, P, PH) Shutter-priority auto (S) Aperture-priority auto (A) Manual (M) Aperture-priority auto (A) 5) Manual (M) Cameras Exposure Mode Matrix
Flash Methods: F-801/N8008 Settings and Lenses
Cameras Metering System CenterWeighted
Flash Methods: F-801s/N8008s Settings and Lenses
Cameras Metering System Lens in Use 1) Cameras Exposure Mode Matrix Programmed auto (PD, P, PH) Shutter-priority auto (S) Aperture-priority auto (A) Manual (M) Aperture-priority auto (A) 5) Manual (M) CenterWeighted Spot
AF Nikkor lenses 3) AI-P lenses
Center- Standard Matrix Balanced Weighted TTL Flash Fill-Flash Fill-Flash
Matrix Balanced FillFlash

CenterWeighted FillFlash

Matrix CenterBalanced Weighted Spot FillFlash Fill-Flash Fill-Flash
AF Teleconverter/ Aperture-priority AF Nikkor auto (A) 4) lenses for F3AF/AItype Nikkor lenses Manual (M) (including AI-S) Programmed auto (P, PH) Shutter-priority Other lenses auto (S) Aperture-priority auto (A) Manual (M)
Other lenses Center- Standard Matrix Balanced Weighted TTL Flash Fill-Flash Fill-Flash

Mode: For F-401x/N5005 Users
Look into camera viewfinder, compose and lightly press the shutter release button. Confirm exposure indicator LEDs (+, R, ) in the viewfinder appear, and make adjustments if necessary. Use the following chart to read LEDs.
+ or + R Aperturepriority auto R R or + or + R Manual R R or
Set aperture in the SB-25s LCD panel*, then read the shooting distance range. For instruction, see Setting Aperture Value (Manual Adjustment), pages 28 to 29. In aperture-priority auto or manual exposure mode, set the aperture value that you have set on the camera (from step 6). In programmed auto or shutter-priority auto exposure mode, aperture is automatically controlled by the camera. Choose and set a value, using the Guide to determining aperture in the following page. Once aperture is set, indicator bars show the shooting distance range.
* This operation is important for reading the appropriate shooting distance from the indicator bars (step 9); setting a wrong aperture value on the SB-25 does not affect all TTL Auto Flash operations a shot will be taken with the aperture set on the camera.
Check whether subject falls within the range of the shooting distance indicator bars in the SB-25s LCD panel. If not, move closer to subject or select a wider aperture (when aperture-priority auto or manual exposure mode), then repeat steps 8 and 9.

Page 62

Firing Flash Guide to determining aperture Use these suggestions as a guide. To choose a suitable aperture, select aperture-priority auto or manual exposure mode.
In programmed auto For subjects backlit by the sun For outdoor subjects on a sunny day For outdoor subjects on a cloudy day, in shadows, or for indoor subjects In shutter-priority auto For subjects backlit by the sun For outdoor subjects on a sunny day For outdoor subjects on a cloudy day in shadows For indoor subjects f/16 at 1/125 sec. f/8 at 1/125 sec. f/5.6 at 1/125 sec. f/5.6 at 1/30 sec f/16 f/8 f/5.6
Confirm ready-light has come on and subject is in focus. Confirm ready-light is on in the camera viewfinder or on the SB-25. Check whether subject is in focus by using the in-focus indicator I in the cameras viewfinder.
Usable maximum apertures in programmed auto or shutter priority auto Choose an aperture that does not exceed the maximum possible aperture for the film in use, as given below. ISO film speed Maximum aperture 25 f/400 f/f/9.f/10
If ready-light blinks for a few seconds after shooting, the flash has fired at its maximum output but the light may have been insufficient. Reconfirm shooting distance and, if necessary, move closer to subject or select a wider aperture (in aperture-priority auto or manual exposure mode) to compensate underexposure.

Page 74

Firing Flash Guide to determining aperture Use these suggestions as a guide for choosing aperture.
In programmed auto (ISO 100) For subjects backlit by the sun For outdoor subjects on a sunny day For subjects beside a bright window For indoor subject In shutter-priority auto For subjects backlit by the sun f/16 at 1/100 sec. f/8 at 1/100 sec. f/5.6 at 1/100 sec. f/5.6 at 1/30 sec. f/16 f/8 f/5.6 f/5.6
For outdoor subjects on a sunny day For subjects beside a bright window For indoor subjects
Look into camera viewfinder, compose and lightly press the shutter release button. Confirm ready-light has come on and subject is in focus. Confirm ready-light is on in the cameras viewfinder or on the SB-25. Check whether subject is in focus by using the in-focus indicator I in the cameras viewfinder
Fully depress the shutter release button to fire flash. Recheck ready-light to see if it is blinking.
If ready-light blinks for a few seconds after shooting, the flash has fired at its maximum output but the light may have been insufficient. Reconfirm shooting distance and, if necessary, move closer to the subject or select a wider aperture (in aperture-priority auto manual exposure mode) to compensate underexposure.

Page 76

Chapter 3 TTL Auto Flash Mode: For FA, FE2, FG and Nikonos V Users
FA, FE2, FG or Nikonos V users can use the SB-25 Speedlight to perform Standard TTL Flash, for fully automatic though-the-lens (TTL) control of flash exposure. Standard TTL Flash can be performed by setting the SB-25 at. In Standard TTL Flash, the flash output level is controlled by the Speedlight to correctly expose subject.
Set desired shutter speed*.
Set your chosen aperture.

3 ISO speed

Before proceeding: ATTACH SPEEDLIGHT TO CAMERA. TURN ON BOTH SPEEDLIGHT AND CAMERA. USE FILM WITH A SPEED BETWEEN ISO 25 AND ISO 400.

7 Aperture

of film in use
Set ISO speed of the film in use. Usable film speeds are from ISO 25 to ISO 400 For instruction, see Setting ISO Film Speed (Manual Adjustment), pages 27 to 28. Set position of the built-in zoom head.
Caution Use the SB-25 exclusively for on-land conditions; it cannot be used in underwater conditions. Always keep the unit away from salt water, rain or water splashes.

Page 78

Confirm Settings Firing Flash
Mode: For FA, FE2, FG and Nikonos V Users

Set aperture in use.

For instruction, see Setting Aperture Value (Manual Adjustment), pages 28 to 29. Shooting indicator bars in the LCD panel move as the figure input changes. Determine approximate flash-shooting distance range by reading indicator bars.
Look into camera viewfinder, compose and lightly press the shutter release button. Confirm ready-light has come on and subject is in focus. Check if ready-light is on in cameras viewfinder or on the SB-25.
Quick reference on relationship between usable apertures and flash shooting distance Use table on page 142 in this instruction manual.

Page 80

Non-TTL Auto Flash
Mode Shooting with Various Lens Apertures
To use various lens apertures for the same subject or when camera/lens combination is incompatible with TTL Auto Flash mode, set the SB-25s flash mode selector to for Non-TTL Auto Flash operation. In Non-TTL Auto Flash shooting, light output automatically changes to match the flash-to-subject distance, but instead of light being measured through the lens, it is measured by the light sensor on the front of the SB-25. The SB-25 can be used in Non-TTL Auto Flash mode with any Nikon camera/lens combination. Before proceeding: ATTACH SPEEDLIGHT TO CAMERA. TURN ON BOTH SPEEDLIGHT AND CAMERA. USE APERTURE-PRIORITY AUTO OR MANUAL EXPOSURE MODE. USE SINGLE-SERVO AUTOFOCUS (S or A) OR MANUAL FOCUS (M).

selector at Non-TTL Auto

Choose position (flash mode selector). Confirm appears in the LCD panel. Choose position (flash sync mode selector*).

3 ISO film

speed in use and zoom-head position
position is used for Rear-Curtain Sync Flash, and only with the F90-Series/N90, F4Series, F-801/N8008, and F-801s/N8008s. For details, see page 105.

4 Aperture

Set ISO film speed and position the built-in zoom head. For instructions, see Setting ISO Film Speed (Manual Adjustment), pages 27 to 28, and Setting Zoom-Head Position (Manual Adjustment), pages 29 to 30.
Set desired aperture in the SB-25s LCD panel, then set again on the camera. For instructions, see Setting Aperture Value (Manual Adjustment), pages 28 to 29. Indicator bars show a appropriate shooting distance range.
APPLICABLE NIKON SLR MODELS F90-Series/N90 F4-Series F-801/N8008 F-801s/N8008s F-601/N6006 F-601M/N6000 F-401x/N5005

Set the aperture value (from step 7) in the SB-25s LCD panel. See Setting Aperture Value (Manual Adjustment), pages 28 to 29. The aperture value is automatically set and indicated in the SB-25s LCD panel when the camera is used with an AF Nikkor lens (including the latest D-Type) or a Nikkor lens having a built-in CPU. An indicator bar appears to show the appropriate shooting distance.
In a bright scene After you have adjusted the camera/flash-to-subject distance (with subject standing at the location represented by indication bar ), readjust indicator bar (from step 11) to the left by one or two steps so the bar indicates a position closer than the actual subject location. Experience indicates that a small amount of underexposure may result in a more pleasing photograph. To readjust the indicator bar, perform one or a combination of the following adjustments: 1) Pressing button to switch from FP1 ( with ) to FP2. 2) Moving further from the subject. 3) Choose a different number for the zoom-head position (wider angle of coverage). We recommend that you not manipulate shutter speed and aperture on the camera.

Page 102

Guide number in FP High-Speed Sync Flash
Confirm subject is at the distance shown by the indicator bar in the SB-25s LCD panel (from step 10). To determine the subject-to-camera distance, read the distance scale on the lens barrel. If the bar location matches the subject-to-camera distance from steps 10 and 11, the subject will be correctly exposed with the selected aperture, shutter speed, and light output amount. If the subject-to-camera distance does not match the appropriate shooting distance, readjust the indicator bars by: a. Pressing button to switch from FP1 ( with ) to FP2, or vice versa. The bar location then moves to show an alternate shooting distance. b. Moving closer to or further from the subject. c. Choose a different number for the zoom-head position (altering guide number). Look into cameras viewfinder again, then compose and lightly press the shutter release button to check that the ready-light is on in the cameras viewfinder. Ready-light also appears on the SB-25. Fully depress shutter release button to fire flash.
The guide number helps you determine an exact flashshooting (flash-to-subject) distance for the selected aperture (f/stop number). FP guide numbers vary with the ISO film speed in use, shutter speed and zoom-head position. Use the equation below for your calculations, and check the following chart for guide numbers. This same equation can be applied to determine an appropriate aperture once the distance is known. [guide number] [flash-shooting distance] = [f/stop] For example, in FP1 operation with an aperture of f/4, a shutter speed of 1/500 sec., a zoom-head position of 35mm and a film speed of ISO 100, the chart recommends a guide number of 12 (or 39 for feet): If measuring in meters; 12 [flash-shooting distance] = 4 = 3 if measuring in feet; 39 [flash-shooting distance] = 4 = 9.75 Next, adjust subject and flash/camera location for 3 meters, or 9.75 feet, to obtain correct exposure in FP1 flash operation.

Check that the SB-25s ready-light has come on. Lightly press the cameras shutter release button to activates the AF illuminator LED. Do not use autofocus lock function. APPLICABLE NIKON SLR MODELS F90-Series/N90 F4-Series F-801/N8008 F-801s/N8008s F-601/N6006 F-601M/N6000 F-401x/N5005
F-501/N2020 Nikonos V F-301/N2000 F3-Series F-401/N4004 F2-Series F-401s/N4004s FM2 FA FG-20 FE2 FG
Confirm whether in-focus indicator LED I in the cameras viewfinder appears. If the in-focus indication does not appear inside the viewfinder, the subject is beyond the autofocus distance range (see at right Notes of AF assist LED); focus manually on the clear matte field.

Page 116

Power Switch Standby (STBY) Position To Conserve Energy and
Setting the power switch to STBY position turns on the SB-25, but the SB-25 will also automatically shut off to conserve flash battery energy. When you will not use the SB-25 for a long time, however, it is recommended to set the power switch to OFF. Hints and Notes

Shorten Recycling Time

When using a remote cord with the FA or FE2 connected to Nikon Motor Drive MD-12, camera remains on as long as the MD-12s power switch is on. In this case, the SB-25 will not turn off in STBY position. Use OFF position to turn it off manually. You cannot use the STBY position to turn on the SB-25 when using it with an FA, FE2 or FG set on a mechanical shutter setting (M250 or B setting with the FA or FE2, M90 or B setting with FG or Nikonos V). Use ON position to turn it on manually.
With the SB-25s power switch on standby (STBY) position, the unit turns off to conserve energy approx. 80 sec. after the cameras meter has turned off. To turn the SB-25 on again, lightly press the shutter release button to turn the cameras meter on, or push the SB-25s open-flash button. APPLICABLE NIKON SLR MODELS F90-Series/N90 F4-Series F-801/N8008 F-801s/N8008s F-601/N6006 F-601M/N6000 F-401x/N5005

Page 118

Guide Number To Calculate a Proper Aperture

Bounce flash (above; with ceiling): Soft, natural-looking lighting. Direct flash (below): Harsh, un-flattering lighting

Page 124

Close-Up Flash Photography in TTL Auto Flash Mode To Flash On
Optional TTL Remote Cord SC-17 or SC-24 lets you perform TTL Auto Flash shooting on a subject closer than 0.6m (2 ft.). Hints and Notes Connect the SB-25 to the camera, using the SC-17 or SC-24*.
* Used for F4-Series with the DW-20 or DW-21 attached.

A Very Close Subject

For example, to shoot a subject located 0.5 m away with an ISO 100 film and a wide-flash adapter: 4 [f/stop] 0.5 = 8 You can then use an aperture of f/8 or smaller (a larger fnumber). As far as conditions allow, you should choose the smallest aperture (as large an f-number) possible. With a very light- or dark-toned subject, take additional shots with other exposure compensation conditions to ensure a correct exposure. See Flash Exposure Compensation on pages 106 and 107, and Exposure Compensation with Cameras Dial on pages 108 and 109.
ISO film Speed and coefficient ISO film speed Coefficient* 100 or lower 4 (14) 8 (26) 500 or higher 11 (36)
Position the SB-25 so light from the head covers the subject. Mount the built-in flash adapter. The zoom-head position is automatically adjusted. Confirm the LCD panel shows with indication. Use aperture-priority auto or manual exposure mode. Choose position (flash mode selector) for TTL Auto Flash operation. For further instruction, see the TTL Auto Flash Mode section relating to your camera type. APPLICABLE NIKON SLR MODELS F90-Series/N90 F4-Series F-801/N8008 F-801s/N8008s F-601/N6006 F-601M/N6000 F-401x/N5005
* Numbers in parentheses ( ) represents coefficients for foot measurement system.
Determine the aperture or f/stop value using the following equation and chart, then set on the lens. The SB-25s LCD panel cannot be used to compute shooting distance. [coefficient] [f/stop] [flash-to-subject distance]

Page 126

Multiple Flash Photography Using More Than One Speedlight
If you have another flash unit, you can use it as a secondary light source for multiple flash photography. When you use only one flash unit in front of a subject, harsh shadows may be produced or light may not reach the background. Using more than one flash unit helps you solve these problems. Carefully consider the number of flash units to use and their locations. For better results, position each unit so its light can brighten a shadow created by another. See also System Chart for TTL Multiple Flash, pages 130 and 131.

Chapter 5

SC-17 SC-24

Notes on Speedlight

Page 134

Red Eye

Red eye is a common problem in flash photography. Normally, flash pictures are taken when the surroundings light is dim, and under such conditions the subjects eye pupils will be dilated (open very wide). Red-eye effect occurs when light from the cameras flash reflects off the interior of the eye and back into the cameras lens. The wide-open pupil allows much light to enter, and as a result, the center portions of a subjects eyes can appear bright red (white in a black and white picture). It is interesting to note that the intensity of the red-eye effect varies among individuals, and with two people in the same photograph, one may have red-eye and the other may not. The appearance of red-eye is also based on the angle at which the light flash on the subject and is reflected back to the cameras lens. If the angle is 2 to 2.5 degrees or narrower, red-eye will occur. As you move closer to a subject, the angle becomes wider, and the likelihood of red-eye effect decreases. As you move farther from a subject, the angle narrows and the incidence of red-eye increases. When you get very far from a subject, the size of the eye in the picture may become so small that red-eye is not apparent, but when you switch to a lens with a longer focal length the redeye will become more apparent. Angle of reflection vs. distance to subject

Flash Sync Mode Selector

The SB-25 is capable of synchronizing flash output with shutter curtain movement, for either the front (first) curtain or rear (second) curtain. At position, the Speedlight synchronizes flash output at the moment the front curtain has fully opened (at the end of front curtain movement) but before the rear curtain has started to travel. This is called frontcurtain sync flash, and is the most popular sync method in flash photography. At position, the unit synchronizes the flash to the instant before the rear curtain starts to close (the end of film exposure). Therefore, it is called rear-curtain sync flash. The position can be chosen to create special effects, and is most effective for freezing a moving subject at the end of a light flow, especially in flash photography at a slow shutter speed.

 

Technical specifications

Full description

Loosen the clamping screw shoe, slide flash into mount and tighten snugly. Connect flash to camera with Off-Camera Shoe I-TTL Synch Cord ( included ). For horizontal shooting, the flash arm stays in the down position. The separation between your lens and the flash eliminates red-eye and softens shadows. For vertical format. rotate the flash arm 180 degrees. The flash will be repositioned to again be centered high above the lens. BRACKET FEATURES * Eliminates Red Eye * Effectively eliminates harsh shadows * Light & compact * Good for horizontal or vertical shooting * Works with all flashes Off-Camera E-TTL II Shoe Cord This Off Camera I-TTL Shoe Cord maintains all on-camera flash functions (including I-TTL) for one Canon-compatible shoe-mount flash unit used off-camera at distances up to 3'. It is compatible with all NIKON cameras - digital or film.

 

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