Nikon SB400 Speedlight
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digital slr cameras
Nikon SB400 Speedlight compatible with both digital and film SLR cameras; auto flash control is set to match the camera body: i-TTL Balanced Fill-Flash control with the D2H, D-TTL Balanced Fill-Flash control and Auto Aperture Flash (AA) with D1 Series and D100 digital SLR cameras, and TTL and Non-TTL Auto Flash (A) with film cameras
The wide angle diffuser on the 580EX now gives full flash coverage for 14mm lenses (full frame) , which means that it will provide full coverage for the EF-S 10-22 lens on a 20D or 300D (equivalent to a 16mm lens on full frame) .