Leica's vintage Summicron 90mm — chrome preset aperture version, a collector's lens.
The Leica Summicron-M 90mm f/2 in chrome with aperture pre-set is a vintage version of the 90mm Summicron. The pre-set aperture mechanism was an early method for setting aperture before the auto-diaphragm became standard.
Optically good for its vintage — the Summicron 90mm f/2 has been excellent across generations. The pre-set aperture requires manually closing to shooting aperture after composing at f/2. Chrome period finish.
Leica M mount. Chrome finish. Pre-set aperture — manual two-ring aperture system. Vintage construction. Rangefinder coupled. The pre-set mechanism is characteristic of early Leica lenses.
Available used at mid-range to professional prices — collector value. The pre-set aperture is impractical by modern standards. For Leica vintage lens collectors. Check for smooth aperture and focus operation.