Leitz Summicron 5cm f2 lens mount_Mamiya NC 3 (model 185D) zoom lens

3 (model 185D) zoom lens for Pentax K-mount SLRs

but if you're the kind of person who believes that a button label should be placed anywhere near its corresponding button

Nothing weird here: clearly marked buttons

clean optics

it also has a fast f4 constant aperture and Canon’s premium L-series optics

Leitz Summicron 5cm f2 lens mount_Mamiya NC 3 (model 185D) zoom lensLeitz Summicron 5cm f2 lens for Leica thread mount. A nice little lens in good shape, just back from a professional CLA. Minor coating marks nothing that'll cause trouble and otherwise clean glass. Smooth focusing and good diaphragm with minor wear. A great companion for any LTM rangefinder.