The newly designed MK II Optical design is based on Sonnar formula with numerous refinements. This lens combines large aperture and compact size, light aluminum body and durable copper core mechanics. Its slight retro appearance greatly fits compact mirrorless cameras. F1.2 is a bright and fast aperture to collect maximum light while using faster shutter speed, whether it is evening time or low light shooting conditions.

The MK II has a clicked aperture ring.