Digital Photography Review on MSN

Cracking the Canon code: what letters like VCM, RF-S and DO tell you about your lens

USM stands for Ultrasonic Autofocus Motor. These lenses offer manual focus override and fast, smooth and comparatively quiet ...
VoxelMatters

Tesseract Technologies is targeting LFAM precision with linear motors

Tesseract Technologies, Formnext Awards finalist in the Rookie category, has developed affordable linear motors for ...