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Technical Highlights & Main Features at a glance:

The powerful SB-25 has a guide number of 36 (metres) at ISO 100 at its 35mm zoom setting, and 50 (metres) at 85mm. With the F90, it offers such advanced features as Multi-Sensor Balanced Fill-Flash, Red-Eye Reduction and FP High-Speed Sync. Selectable flash modes include TTL mode, non-TTL auto, and manual flash control. For example, FP high-speed sync enables you to capture a sharply focused moving subject with shallow depth of field in fill-flash. Also selectable is a strobo-effect operation in which the flash fires continuously at selected rates. The SB-25 provides autofocus capability in total darkness with any Nikon AF SLR (AF-assist Illuminator). You can rotate and tilt its flash head for bounce flash photography. Flash coverage automatically adjusts for any focal length from 24 to 85mm. This can be increased to that of a 20mm Ultrawideangle lens with the built-in wide flash adapter. Manual control is also possible. For your reference, all basic information related to flash photography is displayed on the flash's LCD panel. There's also a built-in bounce card for the catch-Iight effect.

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Finally, the ISO-Standard type accessory shoe on most Nikon SLRs introduced after 1992 offer an extra secure positioning hole which will mate with the flash foot for foolproof mounting system prevents the SB-25 from accidentally slipping off. Overall, this high performance Nikon AF-TTL flash is very usable and has very wide compatibility with Nikon AF SLRs - which makes it a very attractive speedlight to use.

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slowsync.gif Slow Sync When flash pictures are taken at high shutter speeds in dim light, the background may come out dark. Setting Slow Sync extends the automatically controlled shutter speed range In P and A mode (between 1/250 sec. and 1/60 sec.) down to 30 sec. Now background details jump.

Credit: Image of SB-24 courtesy of TrevosePawnShop® <TrevosePawnShop@aol.com> who operates an Ebay Store. Image copyright © 2003. All rights reserved. Please respect the visual property of the contributing photographer.

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Detailing the FULL LCD display of the Nikon SB-25 speedlight and briefly described its various functions.

Reference: The Instruction Manual

slowrearsync.gif Rear-Curtain Sync Nikon Speedlights make it possible to fire the flash just before the shutter curtain closes especially effective at slow shutter speeds. This results in the available light turning into a stream of light following the flash-illuminated subject. When Rear-Curtain Sync is set in the Auto-Multi Program or Aperture-Priority Auto exposure mode, Slow Sync is automatically selected.

redeye.gif Red-Eye Reduction Before the shutter is released and before the TTL Multi Sensor's pre flashes, the SB-25 fires three visible but relatively dim flashes, followed by the main flash which takes the picture. The three dim pre flashes make the subject's eye pupils become smaller, thus reducing the appearance of Red-Eye
FPsync.gif FP High-Speed Sync With the Nikon SB-25 Speedlight set at the FP mode, the flash output continues from the start of the shutter curtain opening until it is fully closed, thus allowing flash synchronization with fast shutter speeds from 1/250 to 1/4000 sec. You can capture fill-flash pictures even with film that has a high ISO rating, and still maintain wide aperture settings for expanded control of depth of field. You choose from two levels of flash output. Please note that: Not all Nikon SLRs are equipped with the FP sync feature (F5, F100 and F90(x) series and/or future models).
repeatingflash.gif Repeating Flash This strobo-effect operation is selectable with the Speedlight SB-25, 'In which the flash fires continuously at selected rates, you can choose the length of time between flashes (1Hz to 50 Hz), the number of flashes and flash output amount.
AF-Assist Illuminator Dedicated Nikon Speedlights - the SB-28, SB-27, SB-26 SB-25, SB-23, SB-22 and SB-20 -with autofocus illuminators send an LED-pattemed beam of light to the subject. making it possible to take sharply focused pictures even in total darkness.
Nikon TTL multiple-flash system Choose a combination of Nikon Speedlights: SB-28, SB-27, SB-26, SB-25, SB-24, SB-23, SB-22, SB-20 or even the MF SB-16B, and use them with the TTL remote or TTL multi-flash sync cord. The camera's TTL Multi Sensor system automatically measures and controls the light from all units.
Automatic Balanced Fill-Flash works not only in bright light situations but also in twilight and at night within a controlled shutter speed/aperture range. 5-Segment TTL Multi Sensor In combination with a full fine of Nikon dedicated TTL Speedlights, Any Nikon SLRs that offers such capabilities (see Specification section for reference) can really spark your imagination, illuminating any photographic situation. You can perform automatic balanced fill flash in the TTL mode in any flash shooting situation, assuring a beautiful, naturally balanced exposure for both foreground and background. With any capable Nikon SLRs (see specification section), TTL flash output is controlled by a 5-segment TTL Multi Sensor incorporated in the bottom of the mirror box. Flash output is more precisely monitored and controlled than conventional TTL flash control with its single-segment TTL sensor.

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Automatic Balanced Fill-Flash This fully automatic system balances the exposure for the background with the flash exposure for the foreground. Both ambient exposure control and flash output are adjusted so that the main foreground subject and the background are similar in brightness. This produces a very pleasing and natural effect.

Recommended: Click to view a copy of the system chart in Gif format (95k) for SB-25 on various combination.

3D Multi-Sensor Balanced Fill-Flash The highest performance possible, 3D Multi-Sensor Flash works with a combination of a Nikon SLR that offers such capability (as a rough guideline, Nikon F90/N90 onwards), a D-type AF Nikkor lens and the SB-25 AF Speedlight. In this flash mode, the SB-25 fires a series of pre-flashes that are detected by a capable Nikon SLR that equipped with such feature; then the TTL Multi Sensors will analyze for brightness and contrast. Moreover, distance information from the D-type AF Nikkor lense in use, along with other exposure control information, is integrated, thus automatically compensating flash output level so that flash output and ambient light are balanced. 3D Multi-Sensor Balanced Fill-Flash can be performed with any metering system. When a capable Nikon SLR model with such capability and a SB-25 are used with a non-D-Type AF or Ai-P Nikkor lens, (non 3D) Multi-Sensor Balanced Fill-Flash which offers the same flash output control system but without distance information and operation superior to single-sensor systems-is performed. Multi-Sensor Balanced Fill-Flash, minus Monitor Preflash, is also performed with newer Nion flash models as well as older series such as SB-24, SB-23,, SB-22, SB-20 and the MF Nikon Speedlight SB-15/16B.
Centre-Weighted and Spot Fill-Hash For Ai-type Nikkor lenses that have no computers, there's Centre-Weighted or Spot Fill-Flash. The many Nikon AF SLRs that offer such possibility in TTL Multi Sensor's elements, functioning as one, control flash output for a natural fill-flash effect.
Standard TTL Flash
Using standard TTL flash control, the flash operates independently from the camera's computer, providing a traditional flash exposure. Even for this basic operation, most Nikon AF SLRs offers advanced performance. The manual flash compensation control provided is a small detail that can make a big difference.
Unique TTL Multi Sensor The first of its type for flash photography. this sensor provides multifunction performance. With the Monitor Pre flash of the SB-25 AF Speedlight, it provides flash exposure analysis before the picture is taken, it then controls the flash during the actual exposure. Virtually. Monitor Pre-flash operation is so fast that you cannot even see it. and camera operation remains the same.

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Specifications for Nikon SB-25 TTL AF Speedlight

Electronic construction: Automatic silicon-controlled rectifier and series circuitry

Flash modes: four settings (TTL, A, M and Repeating/
Strobe Flash)
Guide Number: GN 36 (meters and ASA 100); GN 20 with flash diffuser.
Angle of coverage:
Coverage as wide as 20mm with built-in wide flash adapter, auto power zoom 24mm-85mm with the Nikon F5, F100, F90x/N90s, F90 Series/N90, F4 Series, F801/N8808 and F801s/N8808s and and other capable/newer Nikon SLR bodies; manually set with other cameras.
Bounce flash: Flash head tilts from -7° to +90° with click stops; flash head rotates through an arc of 270°, 90° clockwise and 180° counterclockwise with click stops.
Flash exposure control: Nikon F5, F100, F90x/N90s, F90/N90, F4, F801/N8808, F801s/N8808s, F601/N6006, F601M/N6000, F50/N50, F401x/N5005, F501x/N2020, F301/N2000, F401/N4004, F401s/N4004s and other capable AF Nikon models in conjunction with any AF-Nikkor CPU** lense; MF Nikon SLRs such as FA, FE2, FG, Nikonos-V. Usable aperture f/1.4 - f/22 at ISO 100. Shooting distance .6-20 meters (2-66 ft.). Distance scale can be changed from meters to feet with lever inside battery compartment. Nikon F3 series only operates in Auto mode but TTL flash is possible via AS-7 and/or AS-17 flash coupler. Multi-Sensor Balanced Fill-Flash with the later Nikon AF cameras such as Nikon F5, F100, F90x, F85, PRONEA 600i or F70 etc. with any AF-Nikkor CPU lense * Matrix balanced fill-flash: with F4-series, F801/N8808, F801s/N8808s, F601/N6006, F50/N50 or N5005 and other capable/newer Nikon SLR bodies with AF and Ai-P Nikkor lenses.
Auto flash Mode: Non-TTL, light measured via sensor on front. Usable apertures : f/2, f/2.8, f/4, f/5.6, f/8 and f/11 (at ISO 100). Shooting distance .6-20 meters (2-66 ft.) Manual control: full output light output set in 18 steps from Full to 1/64 power in 1/3 steps. * "CPU" lenses refer to those AF Nikkor, AF-I Nikkor, IX-Nikkor or Ai-P Nikkor lenses which feature a built-in microcomputer and CPU contacts. ** With F4-series, Manual Focus Ai-S or Ai Nikkor lenses are also usable.

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Credit: A few interesting notes highlighted at Nikon Links:

# Coverage as wide as 20mm with built-in wide flash adapter, auto power zoom 24mm-85mm with the Nikon F90x/N90s, F90 Series/N90, F4 Series, F801/N8808 and F801s/N8808s; manually set with other cameras.
# Three power switch settings; OFF, STBY and ON; at STBY position with Nikon F90x/N90s, F90/N90, F4, F801/N8808, F801s/N8808s, F601/N6006, F50/N50, F401x/N5005, F501x/N2020, F301/N2000, F401/N4004, F401s/N4004s, FA, FE2, FG, Nikonos-V, FM2 or FG-20 the SB-25 turns off automatically after unit is not used for approx. 80 seconds and turns on when the camera is turned on.
# TTL Mode : Used with Nikon F90x/N90s, F90/N90, F4, F801/N8808, F801s/N8808s, F601/N6006, F601M/N6000, F50/N50, F401x/N5005, F501x/N2020, F301/N2000, F401/N4004, F401s/N4004s, FA, FE2, FG, Nikonos-V. Useable aperture f/1.4 - f/22 at ISO 100. Shooting distance .6-20 meters (2-66 ft.). Distance scale can be changed from meters to feet with lever inside battery compartment.
# AF Assist Light : LED beam automatically fired using AF in insufficient light with Nikon F90x/N90s, F90/N90, F4, F801/N8808, F801s/N8808s, F50/N50, F401x/N5005, F501x/N2020, F401/N4004 and F401s/N4004s
# Red eye reduction lamp fires before main flash with compatible Nikon SLR moels.
# Rear curtain sync for Nikon F90x/N90s, F90/N90, F4, F601/N6006, F601m/N6000, F801/N8808, F801s/N8808s.
# FP High Speed sync flash - available with Nikon F90x/N90s, F90/N90 enables high speed shutter (1/250 or faster) for flash sync.
# Monitor pre-flash - available with when used with Nikon F90x/N90s, F90/N90 and AF Nikkor lens.


Flash working range: 0.6 to 18m (2.0 ft ~ 65 ft.) with indicative increments in 0.6, 0.8, 1, 1.5, 2, 3, 4, 6, 9, 13 and 18m
Film speed range in TTL auto flash mode: ISO 25 to 1000 with Nikon F4-series, F90x, F-801s, F70, F-601s, F50 or F-401x; with F-401s and older: ISO 25 to 400.
Recycling time: Approx. 7 seconds minimum (full discharge)
Red-Eye Reduction: lamp fires before main flash with Nikon F5, F100 or other compatible Nikon SLR bodies. Credit: Mr. Corrado LOSI from Italy for rectifying a mistake made.
AF-Assist Illuminator: Automatically fires LED beam toward subject when performing autofocus with all Nikon AF SLRs
such as Nikon F5, F100, F90x/N90s, F90/N90, F4, F801/N8808, F801s/N8808s, F50/N50, F401x/N5005, F501x/N2020, F401/N4004 and F401s/N4004s and other capable Nikon AF SLRs
Rear Curtain Sync:Nikon F5, F100, F90x/N90s, F90/N90, F4 Series, F601/N6006, F601m/N6000, F801/N8808, F801s/N8808s and other newer/capable Nikon SLR bodies introduced at later stages

FP High Speed sync flash: available with Nikon F5, F100, F90x/N90s, F90/N90 and other capable Nikon SLR bodies enables high speed shutter (1/250 or faster) for flash sync.
Monitor Pre-flash: available with when used with Nikon F5, F100, F90x/N90s, F90/N90 and other newer Nikon SLR bodies with D-type AF Nikkor lenses.
Power source: Four 1.5V AA-type alkaline-manganese or NiCd AA batteries;
Accepts optional battery packs SD-7 and high performance power pack SD-8
Dimensions (without mounting foot): Approx.
79mm x 135mm x 101mm
Weight (without batteries): Approx. 380g (13 oz)
Other features: Three power switch settings; OFF, STBY and ON; at STBY position with Nikon F5, F100, F90x/N90s, F90/N90, F4, F801/N8808, F801s/N8808s, F601/N6006, F50/N50, F401x/N5005, F501x/N2020, F301/N2000, F401/N4004, F401s/N4004s, FA, FE2, FG, Nikonos-V, FM2 or FG-20 the SB-25 turns off automatically after unit is not used for approx. 80 seconds and turns on when the camera is turned on.

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Credit: Image of SB-24 courtesy of Mr. PAUL W® <LOLA600@aol.co>. Paul has a Ebay section on photographic equipment. Images copyright © 2003. All rights reserved. Please respect the visual property of the contributing photographer.

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Works courtesy of Mr. Jim/ lensinc.ltd. pls send a thank you note on my behalf as well.
instruction manual for SB-24 (3.1MB) http://www.lensinc.net/manuals/SB24_user.PDF
instruction manual for SB-25 (3.4MB) http://www.lensinc.net/manuals/SB25BK.PDF
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previous | NEXT | Nikon AF-TTL Speedlight SB-26

Main Index Pages for Nikon Flash Photography with Nikon F4 and others:
| Part I | Part II | Part III |

Nikon AF-TTL Speedlights | SB-20 (1986) | SB-22 (1987) | SB-23 | SB-24 (1988) | SB-25 (1991/2) | SB-26 (1994) | SB-27(1997) | SB-28 (1997) | Nikon SB-29(s) (2000) | Nikon SB-30 (2003) | Nikon SB-600 (2004) | Nikon SB-800 (2003)
Nikon AF-TTL Speedlight DX-Series:
Nikon SB-28DX (1999) | SB-50DX (2001) | SB-80DX (2002) (updated)

Nikon BC-flash Series | Original Nikon Speedlight
SB-2 | SB-3 | SB-4 | SB-5 | SB-6 | SB-7E | SB-8E | SB-9 | SB-E | SB-10
SB-11
| SB-12 | SB-14 | SB-140 UV-IR| SB-15 | SB16A | SB-17 | SB-18, SB-19 | SB-21A (SB-29) Macro flash | Flash Accesories | SF-1 Pilot Lamp

The Camera Body - Features | Reliability | Focusing | Metering | Exposure Control | Lense Compatibility| Various Power Sources | Interchangeable Prisms | Data Film Backs | Focusing Screens | Flash Photography | Other system accessories | Cases for Nikon F4 Series | Remote Control |

| Specification | Main Reference Map | Nikon F4 Variants
Instruction Manual: PDF (4.5M) - External Link

| BACK | to Main Index Page Nikon F4 Series SLR camera Models

| Message Board | for Nikon F4 Series SLR model(s)
| Message Board | for your Nikon Optics in a shared environment
| Message Bo\ard | Specifically for Dispose or Looking for Nikon/Nikkor Photographic Equipment

weblibrary.gif   Nikon F | Nikon F2 | Nikon F3 | Nikon F4 | Nikon F5 | Nikon F6 | Nikkormat / Nikomat | Nikon FM | Nikon FE/ FA | Nikon EM/FG/FG20 | Nikon Digital SLRs | Nikon - Other models

Nikon Auto Focus Nikkor lenses:- Main Index Page
Nikon
Manual Focus Nikkor lenses:- Fisheye-Nikkor Lenses - Circular | Full Frame | Ultrawides Lenses - 13mm15mm18mm20mm | Wideangle Lenses - 24mm28mm35mm | Standard Lenses - 45mm 50mm 58mm | Telephoto Lenses - 85mm105mm135mm180mm & 200mm | Super-Telephoto Lenses - 300mm 400mm 500mm 600mm 800mm 1200mm |

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Index Page
  Special Application lenses:
Micro-Nikkor Lenses - 50mm~55mm -60mm 85mm -105mm 200mm Micro-Zoom 70-180mm
Perspective Control (PC) - 28mm 35mm PC-Micro 85mm
Dedicated Lenses for Nikon F3AF: AF 80mm f/2.8 | AF 200mm f/3.5 EDIF
Depth of Field Control (DC): 105mm 135mm
Medical Nikkor: 120mm 200mm
Reflex-Nikkor Lenses - 500mm 1000mm 2000mm
Others: Noct Nikkor | OP-Nikkor | UV Nikkor 55mm 105mm | Focusing Units | Bellows-Nikkor 105mm 135mm
Nikon Series E Lenses: 28mm35mm50mm100mm135mm | E-Series Zoom lenses: 36~72mm75~150mm70~210mm


MF Zoom-Nikkor Lenses: 25~50mm | 28~45mm | 28~50mm | 28~85mm | 35~70mm | 36~72mm E | 35~85mm | 35~105mm | 35~135mm | 35~200mm | 43~86mm | 50~135mm | 50~300mm | 70~210mm E | 75~150mm E | 80~200mm | 85~250mm | 100~300mm | 180~600mm | 200~400mm | 200~600mm | 360~1200mm | 1200~1700mm

Tele-Converters: TC-1 | TC-2 | TC-200 | TC-201 | TC-300 | TC-301 | TC-14 | TC-14A | TC-14B | TC-14C | TC-14E | TC-16 | TC-16A | TC-20E

Recommended links to understand more technical details related to the Nikkor F-mount and production Serial Number:
http://rick_oleson.tripod.com/index-153.html by: my friend, Rick Oleson
http://www.zi.ku.dk/personal/lhhansen/photo/fmount.htm by: Hansen, Lars Holst
http://www.mir.com.my/rb/photography/hardwares/nikonfmount/lens2.htm
http://www.photosynthesis.co.nz/nikon/serialno.html

W A R N I N G: The New G-SERIES Nikkor lenses have no aperture ring on the lense, they cannot adjust aperture(s)when operating in manual exposure control even with certain earlier AF Nikon SLR camera models. Similarly, not ALL features provide in a modern AF-S series AF-Nikkor lenses can be utilized fully with a Nikon F4. Please refer to your local distributor for compatibility issue(s).

PLEASE NOTE: Complimentary links are appreciative but it is not necessary, I have limited bandwidth here in this server... So, PLEASE don't distribute this URL to any bulk mailing list or unrelated user-groups, just be a little considerate, thank you. (The more you distribute, the slower this server will response to your requests...). I am NOT a Nikon nor Nikkor expert, so don't send me any mails, use the Message Board Instead. While the content prepared herein should be adequate for anyone to understand and evaluate whether you should invest into a used Nikon F4 pro-camera system for your kind of photography. Well, IF you like what you have seen so far, please help to perfect this site by reporting any broken links or any errors made.

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About this photographic site.

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Credit: Chuck Hester, US for his patience, encouragement and help to setup the various content in this site; Robert Johnson for some of his original images on the F2H-MD appeared in this site; my ex-staff, KiaSu for his superb 3-D logo appeared in this Nikon F2 site; Marc Vorgers from Holland who generously provide me with some of his images of F2AS; MCLau®, who has so much time with me to re-edit the content in this site and not to mention buying a Nikon Coolpix 990 just for this site; Paul Armstrong (pkared@ameritech.net) for his explantion of the FF2 Slidemagic and Nikon F2 Pin Camera Keat Photo, Kuala Lumpur for providing their Nikon F2A to take some images for this site; Mr Edward Ngoh the great camera collector who provides us his collection of F2AS with MD-2; hawkeye.photographic.com for their images on the Speed Magny film backs; Sean Cranor for his image on Nikon F2 25th Anniversary Model; Ted Wengelaar®, Holland for his continuous flow of input on some of the early Nikon bodies; Genesis-Camera for granting permission to use an image of the SS-F2 camera; Mr Sover Wong, Australia for those great images of his rare F2 Gold;CYLeow ®, photo editor of the Star newspaper, Malaysia for some of his images used in this site. Ms Rissa Chan, Sales manager from Shriro Malaysia who has helped to provide some of the very useful input. HiuraShinsaku®, Nikomat ML, Japan for some of his images on various F2 models; my staff, Wati, Maisa, Mai and my nephew, EEWyn®, who volunteered and helping me did so many of the film scanning works; Hong-sien Kwee of Singapore for all the Nikon F2 Pin camera images appeared in this site; Luigi Crescenzi for many of his images on the Nikon F2 Titan; John for two of his images of the Nikon F2/T used in this site; Contributing photographers or resellers: Jen Siow, Foo KokKin, Arthur Teng, Mark Fallander, John Ishii, Ed Hassel, YoonKi Kim, Jean-Louis, M.Dugentas (Dell Corner.com.), Mr "Arsenall", Yang Zi Xiong and a few images mailed in from surfers with no appropriate reference to their origin. Note:certain content and images appeared in this site were either scanned from official marketing leaflets, brochures published by Nikon and/or contribution from surfers who claimed originality of their own work to publish in this site based on educational merits. The creator of this site will not be responsible for any discrepancies that may arise from such possible dispute except rectifying them after verification."Nikon", "Nikkormat", "Nippon Kokagu KK" & "Nikkor" are registered tradename of Nikon Corporation Inc., Japan. A site made with an Apple IMac.

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