Leica's sharp M-mount 90mm — Summicron f/2 with 6-bit coding for digital M bodies.
The Leica Summicron-M 90mm f/2 (6-bit) is a portrait telephoto prime for the Leica M rangefinder system at Summicron (f/2) aperture class. 6-bit coded for electronic communication with Leica M digital bodies. Full-frame. Leica M mount.
f/2 maximum aperture. 90mm focal length (full-frame). 6-bit lens coding. Manual focus with rangefinder coupling. At approximately 430g. 55mm filter thread. Leica M mount.
The 6-bit coding communicates lens data to M digital bodies for EXIF metadata and in-camera correction. The 90mm focal length provides natural compression for portrait work. The standard Summicron-M 90mm is a compact and affordable alternative to the larger APO-Summicron-M 90mm f/2 ASPH., which provides higher resolution at significantly greater cost and size.
On the used market the Leica Summicron-M 90mm f/2 (6-bit) is a classic M-mount portrait prime. Condition checks: 55mm front element for marks, focus ring damping, rangefinder coupling accuracy (90mm coupling window is narrower than 35mm or 50mm), 6-bit contacts. Leica M mount — manual focus. Verify 90mm frameline availability on your specific M body.