What is the fastest zoom lens ever built?
The Canon, Leitz and Nikon (and others) super fast lenses were not gimmicks … they were designed for use in extreme low light conditions … mostly on the end of a 35 mm motion picture camera (Stanley Kubrick’s “Barry Lyndon” famous candle lit scene with a Carl Zeiss 50mm f/0.7 lens) or broadcast TV cameras, but later adopted by well heeled photojournalists. The f/2.8 zoom is new on the scene … most of the first ones were in the f/3.5 to f/4 range. Olympus may have the record for the fastest zoom lens at F/2.0 http://www.uniquephoto.com/index.php?par… The 35-100 mm f/2.0 is designed for the Olympus DSLR’s which have a smaller sensor that other DSLR’s so the lens is equivilant to a 70-200 mm lens on a 35 mm camera, so would be a good choice for those shooting wildlife at dawn or dusk …