35mm F1.2lens contains 6 elements in 5 groups. Optical design is based on Sonnar formulawith numerous refinements. This lens combines large aperture and compact size,light aluminum body and durable copper core mechanics. Its slight retroappearance greatly fits compact mirrorless cameras. F1.2 is a bright and fastaperture to collect maximum light while using faster shutter speed, whether itis evening time or low light shooting conditions.