control and image capture from select Sigma cameras. Sigma makes autofocus lenses for the Sigma SA, Canon EF, Nikon F, Minolta/Sony α, Pentax K and Four
single-lens reflex cameras with and also without an autofocus motor. Cameras lacking an integrated autofocus motor (often called screw drive) are the Nikon
Sigma50mmf/1.4 EX DG HSM is a normal prime lens made by the Sigma Corporation. The lens is produced in Canon EF mount, Four Thirds System, Nikon F-mount
introduction of autofocus, but rather extended to meet new requirements related to metering, autofocus, and aperture control. The large variety of F-mount compatible