The Nikon SB-400 Speedlight is 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.
Quick Glance
Compatible Camera: All cameras compatible with Nikon Creative Lighting System
Flash Mode: i-TTL, Manual - D40 only
Compatibility
Compatible Camera Model(s): All cameras compatible with Nikon Creative Lighting System
Flash Mode: i-TTL, Manual - D40 only
Performance
Guide Number: 30 m/98.4 ft at ISO 200 (18 mm Zoom-head Setting)
Flash Coverage: 18 mm when mounted on a Nikon DX format digital SLR camera, 27 mm when mounted on an F6 35mm SLR
Flash Recycle Time: 3.9 Second - Alkaline-manganese, 4.2 Second - Lithium, 3.1 Second - Oxyride, 2.5 Second - Nickel-Metal Hydride (Ni-MH)
Battery Life: 140 Flash Maximum - Alkaline-manganese, 250 Flash Maximum - Lithium, 150 Flash Maximum - Oxyride, 210 Flash Maximum - Nickel-Metal Hydride (Ni-MH)
General
Dimensions: 2.20" Height x 2.60" Width x 3.10" Depth - Approximately
Weight: 4.50 oz Approximate - without batteries
Warranty Information: 1 Year Limited
URL: Manufacturer Link
SB-400 Speedlight Flash
Strengths: Multi-position flash head eliminates hard shadows and burned-out highlights. Indicator light is very visible outdoors. It has fast recycling time with very good battery life.
Weakness: Sideways tilt function should have been included in the design. Doesn't fit snugly in the accessory shoe but the built in lock works very well.
This product is perfect for you if you own a D40 DSLR camera but you hate its built in pop up flash and don't want to buy a heavy and expensive external flash. Use the SB-400 flash when taking photos indoors and you'll love your pictures the way you've never loved them before. Enjoy!