Voigtlander 20mm F3.5 SL II is a Manual Focus (MF)
Wideangle Prime lens with 35mm FF max sensor coverage and it is designed to be used with Canon EF mount cameras.
Lens Mount
Voigtlander 20mm F3.5 SL II is compatible with cameras that have Canon EF lens mount.Some of the latest released cameras with Canon EF lens mount are
Canon 1D X III,
Canon 6D MII and
Canon 5D MIV.
Sensor Coverage
Max sensor coverage of Voigtlander 20mm F3.5 SL II is 35mm FF.
Focal Range
Voigtlander 20mm F3.5 SL II has a fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 32mm.
Optical Image Stabilization
Voigtlander 20mm F3.5 SL II doesn't have an optical image stabilization system so the only option to stabilize the image taken with this lens is to mount on a camera body with IBIS (sensor based In-body image stabilization).
Aperture
Voigtlander 20mm F3.5 SL II has a max aperture of F3.5 and a minimum aperture of F22.0.
Optical Formula
Voigtlander 20mm F3.5 SL II's optical formula consists of 9 elements in 6 groups.