What to do if the ready-light on my Nikon SB-400 blinks for 40 seconds?
If the ready-light blinks for 40 seconds at 2 Hz, this indicates that the battery power is low. You should replace or recharge the batteries.
Crucial safety instructions to prevent injury and product damage.
Introductory remarks about the Speedlight manual and its purpose.
Instructions to verify all items included in the product package.
Guidance on compatibility with Nikon and third-party equipment.
Recommends test shots, regular servicing, and online support resources.
Lists compatible cameras and identifies Speedlight components.
Step-by-step instructions for battery installation and usable battery types.
Guide on securely mounting the SB-400 to the camera and adjusting the flash head.
Instructions for powering on the unit and configuring camera settings.
Information on the effective flash distance based on camera settings.
Explains Slow-sync, Red-eye reduction, Rear-curtain sync, FV Lock, and manual modes.
Details on adjusting flash output and exposure for creative control.
Introduction to using bounce flash for softer lighting effects.
Practical advice for successful bounce flash photography.
Advice on correcting mottled appearance and improving illumination.
Details TTL Remote Cord SC-28/17 and provides care/storage guidelines.
Precautions for temperature, environment, and battery handling.
Guidelines for continuous firing, camera compatibility, and microcomputer notes.
Comprehensive technical and performance data for the SB-400 Speedlight.
General| Flash modes | Manual, Red-eye reduction |
|---|---|
| Compatibility | D700, D300, D7000, D90, D5100, D5000, D3100, D3000, D60, D40 |
| Product color | Black |
| Approx. number of flashes | 140 |
| Approximate recycling time | 3.9 s |
| Camera brands compatibility | Nikon |
| Brand specific flash systems | i-TTL (Nikon) |
| Guide number (ISO 100, set at 35mm zoom) | 21 m |
| Battery type | AA |
| Number of batteries supported | 2 |
Weight and Dimensions| Depth | 80 mm |
|---|---|
| Width | 66 mm |
| Height | 56.5 mm |
| Weight | 127 g |
| Dimensions (WxDxH) | 66 x 80 x 56.5 mm |
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