The lens is constructed of nine elements in seven groups, including a ground aspherical surface and another aspherical element. It uses a 12-blade aperture diaphragm, has a minimum focusing distance of 90cm (35.5”) and uses a 62mm front filter thread.
The manual focus mechanism uses an all-metal helicoid design that Cosina says is made with a ‘high-quality grease that produces appropriate torque, focusing with a smooth operation.’ The lens features a rangefinder interlocking mechanism when paired with a Leica M mount rangefinder, but also works as an adapted lens on modern mirrorless camera systems. It also comes with an included reversible lens hood.
Despite its ultra-fast F1 aperture, the lens measures only 73.6mm (2.9”) in diameter, 55mm (2.2”) long and weighs just 484g (16oz). The lens is expected to ship in January 2022 for an MSRP of ¥ 225,000 / ~$1,980.
This article comes from DP Review and can be read on the original site.