Leica's vintage Summicron 90mm — chrome preset aperture version, a collector's lens.
The Leica Summicron-M 90mm f/2 (Chrome, aperture pre-set) is a vintage variant of the Leica Summicron-M 90mm portrait prime for the M rangefinder system, in chrome finish with a pre-set aperture ring — a design from an early M-system production era. Leica M mount.
f/2 maximum aperture. 90mm focal length (full-frame). Chrome finish. Aperture pre-set ring (set aperture value on pre-set ring and stop down before shooting). Manual focus with rangefinder coupling. Leica M mount.
The pre-set aperture mechanism predates the click-stop aperture ring: the photographer sets the desired aperture on the pre-set ring and stops down to it manually before shooting. Chrome finish is period-correct for early Leica M production. The chrome pre-set variant is a collector piece from the formative M-system era.
On the used market this is a vintage chrome Summicron-M 90mm portrait prime. Condition checks: front element for marks or cleaning scratches, pre-set aperture ring operation, focus ring damping, rangefinder coupling. Leica M mount. Collector piece — verify production era via serial number.