This lens has Canon's ultrasonic motor (USM), which is silent and fast. I cannot hear the lens auto-focus. It supports full-time manual focus, which means you ...
The Canon EF 24-70mm f/2.8 L USM Lens is one of the most amazing zoom lens I have ever used. Firstly, getting the actual lens to my house took an excruciating ...
Error 84 is a lens problem. Try removing your lens from the D30 and try operating your camera. Does the camera work by itself, without the lens? Chieh Cheng
Oct 14, 2009 · I'm working on a small project and wanted to drive a Canon lens without the camera body. ... The Canon EF lens protocol is a private interface.