Reviewed By: Nick Allen on 05/09/2007,
Customer Rating: 
The Canon EF 100mm f/2.8 is my heavily used lens for doing close-up photography of flowers and insects some time paintings. Together with the Canon EOS 20D the EF 100mm f/2.8, prime lens will give up to 168mm. This allows me to keep a perfect distance to moving objects like cars, insects flying around. Depending on the object, I tend to use small and medium aperture. In any condition I have try the EF 100mm f/2.8 lens, the picture is always sharp, coming with high contrast and color reproduction, suburb image quality.
Another advantage of the EF 100mm f/2.8 lens is the front element. It lies a bit in the inner part of the lens case, so a lens hood or a filter just to protect the front lens element is not much necessary, but I always keep the filter on just in case.
For close-up photography I do focus manually all the time, because with Auto focus I need tripod for the EF 100mm f/2.8 lens to keep it steady. But in some cases I experience problem with the auto focus of EF 100mm f/2.8 lens. It easily jumps even with the right position on the focus limiter. The Auto Focus is very quite and smooth as the EF 100mm f/2.8 equipped with USM (Ultra-Sonic-Motor) technology.
My average rating for the EF 100mm f/2.8 lens:
I can recommend the EF 100mm f/2.8 lens because of its perfect optics, high quality result, and fast, quite focus. The build quality is very really fantastic, it solid, durable. | 
