30-90mm f/3.5-5.6 Vario-Elmar-S ASPH.
Medium Format Zoom Lens
The 30-90mm f/3.5-5.6 Vario-Elmar-S ASPH. from Leica is a wide-angle prime lens designed for use with Leica S-series medium format digital cameras. It provides a versatile 35mm focal length equivalency of 24-72mm. For a medium format lens, it is also particularly compact and lightweight, making it an excellent all-in-one choice.
The optical design uses 14 elements in 11 groups. Nine elements are made from glass with anomalous partial dispersion and three low-dispersion fluoride elements work to correct chromatic aberrations. Two aspherical surfaces on the rear element and another on the front lens of the second group maintain consistent imaging performance and minimal distortion at shorter distances. At all focal lengths, the effects of vignetting are imperceptible.