Sigma Publishes Note to Canon EOS 40D Owners Regarding Two LensesSigma has published a notice to Canon EOS 40D owners to alert them to a condition when the Canon 40D digital SLR is in AI Servo AF mode, and the APO 120-400mm F4.5-5.6 DG OS HSM for Canon or APO 150-500mm F5-6.3 DG OS HSM for Canon lenses are attached to the camera with the OS function switched ON, the number of continuous frames per second will decrease. Sigma will start supplying 40D owners who own either of these lenses with a free-upgrade service.
Read MoreSource: CameraTown.com (2008-05-29 09:00:13)