[Martin Melchior] wanted to use an older Sigma lens with his Canon camera. The problem in trying to do so is that the camera uses a different communications protocol than the lens is expecting. But if ...

Canon currently markets three types of interchangeable lens cameras—and they all use different lenses. That can make shopping for a new lens a little more difficult than with other brands. The first ...

This is Canon’s longest zoom lens and is categorised as one of their L range. The lens has been around for some time now, earning itself a somewhat mixed reputation amongst digital photographers that ...

Sharpness at 70mm is excellent in the centre from f/2.8 through to f/8. It is very good at f/11 and f/16, good at f/22, and only at f/32 does diffraction really get a grip and here it is only fair.