Comments about Canon 400mm F5.6 L USM AF Lens ( 2526A004 ):

I frequently use this lens handheld during daylight hours. It is lightweight and tracks moving objects better than any other L-series lens I own. Birds in flight are easy to capture, images are razor sharp and success rate (sharp vs out-of-focus) is 80% or better every time I go out. I use a 40d and thus do not have the newer cross-type focusing or dual processors and still get great AI Servo response with this lens.Abe's offered best price [...]

Comments about Canon 400mm F5.6 L USM AF Lens ( 2526A004 ):

I bought this lense for Lunar photos. I could not afford the 800mm so this was the next best thing. And as of now i a m very pleased with my choice. [...]