This manual contains all the information you need to know about using the Nikon Autofocus Speedlight SB-25, including features and operations.
This manual explains how to install, configure, and operate the Nikon SB-25 Autofocus Speedlight. It covers safety warnings, battery installation, mounting the flash to the camera shoe, and using the LCD panel for adjustments such as ISO, aperture, zoom‑head position, and flash‑head tilt.
The guide details each flash mode (TTL, A, M, Repeating), special functions like High‑Speed Sync, Rear‑Curtain Sync, Red‑Eye Reduction, and AF‑assist LED, and includes application tips for portrait, outdoor, and multiple‑exposure photography. A battery and specifications section provides power‑source options, guide numbers, flash duration, and recycling times.
| Guide number (ISO 100) | 20/66 (20mm), 30/98 (24mm), 32/105 (28mm) … |
|---|---|
| Flash duration (full power) | 1/1000 sec. |
| Zoom capability | Seven settings: 20mm, 24mm, 28mm, 35mm, 50mm, 70mm, 85mm |
| Power source | Four 1.5 V AA alkaline‑manganese or 1.2 V NiCd batteries; optional SD‑7/SD‑8 external DC unit |
| Maximum flash repetitions (strobo mode) | Up to 160 flashes per frame |
The SB-25 can fire up to 160 flashes per frame in Repeating Flash (strobo) mode.
The SB-25 uses four 1.5 V AA alkaline‑manganese batteries or four 1.2 V NiCd AA batteries.
It fires three pre‑flashes before the main flash to cause the subject’s pupils to constrict, reducing red‑eye.
At ISO 100 the guide numbers range from 20/66 at 20 mm to 34/112 at 85 mm.