The SB-400 is the second tiniest flash ever sold by Nikon. The SB-30 is smaller, but doesn't work on any of the current Nikon DSLRs. It's so simple to use, my 2-day old baby read the manual, figured it out, and went back to sleep.

Oct 2, 2001 · Nikon announces the Nikon Speedlight SB-400, an intelligent and versatile external flash unit that provides i-TTL flash operation in a super-compact and ultra-lightweight body at an affordable price.

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Manufacturer description: With its powerful guide number of 21, the SB-400 is an ideal flash unit for beginners in digital SLR photography, but it is also useful for hobbyists and professionals looking for a handy i-TTL flash unit offering an effortless bounce flash function.

The SB-400 is a compact, lightweight speedlight unit designed for individual wanting more power and coverage than offered by the camera's built-in flash. The easy-to-use SB-400 has a flash coverage as wide as 18mm on Nikon DX-format DSLRs and a …

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The Nikon SB-400 Speedlight flash is compatible with i-TTL and M* flash modes, to provide you with a wider range. Ideal for photographers who want to keep things simple, the Nikon SB-400 really couldn't be any easier to use!

For the first timer looking for a bit more power and the versatility of bounce flash compared to their built-in flash, the SB-400 fits the bill, but it also makes a great lightweight alternative to the more cumbersome SB-600 and SB-800 for the pro user looking to travel light.

Nikon Speedlight SB-400 is an external flash unit that provides i-TTL flash operation in a compact and lightweight body at an affordable price. The SB-400 offers a guide number of 30 (ISO 200, m), and effortless bounce flash function.