Zhong Yi Optics has announced the Mitakon 135mm F2.5. A fast, manual telephoto portrait lens for full-frame DSLR and mirrorless camera systems.
The lens is constructed of nine elements in seven groups, including two extra-low dispersion and two ultra-high refraction elements. It has a nine-blade aperture diaphragm, an aperture range of F2.5 through F22, a minimum focusing distance of 100cm (4') and uses a 67mm front filter thread.
Despite offering a 135mm focal length, the lens is rather compact at just 137mm (5.4") long by 79mm (3.1") in diameter and weighing 856g (1.86lbs). The lens is available in Canon EF, Canon RF, Nikon F, Nikon Z and Sony FE mount options.
The 135mm F2.5 features a metallic housing and clear markings on the aperture ring and focus ring. It utilizes an internal focus design and the focus throw is comparatively long for a stills lens. The lens is claimed to have very minimal breathing.
The lens tips the scales at 8455g / 1.86 lb and it has a 67mm front filter diameter. The minimum focusing distance is 1m / 3.94′.