single-lens reflex cameras with and also without an autofocus motor. Cameras lacking an integrated autofocus motor (often called screw drive) are the Nikon
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
The Sigma8–16mm lens is an enthusiast-level, ultra wide-angle rectilinear zoom lens made by Sigma Corporation specifically for use with APS-C small format