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Leitz/Leica 35mm f2.0 M System Mount Summicron

Do you have a Leitz/Leica 35mm f2.0 M System Mount Summicron? Repair needed? Or maybe a CLA?

Description
Specifications

The first optical version of this lens (1958-1969) is legendary. It is an expensive to produce eight element execution of a symmetrical double Gauss formulation with the 2nd & 3rd and the 6th & 7th elements cemented.

It was initially produced in all three physical mounts for the time; Screw Mount, M2/M4 and in "Bug Eyed M3"; in both black painted and in chrome finish. The Screw Mount embodiment was produced in extremely low numbers and is sometimes "counterfeited" by removing the bayonet mount and substituting a standard Leica screw mount part. Optically this is a disaster as the new cam pitch interfaced is a mismatch. Examples of the type One formulation command a premium in the used marketplace and the "Blacks" bring an even higher price than the recent "ASPH" version. E39 filter/accessory size.

The Second optical version (1969-71 onset serial number 2,316,001), also symmetrical Gaussian designed and first executed in Midland Canada as was version One, has six elements and was designed to be less expensive to produce but equal in optical quality to its predecessor.

It is physically distinguishable by having an aperture setting lever and it takes E39 filter/accessory size.

The Third optical version (1971-79 onset serial number 2,646,001) New physical embodiment. Aperture setting lever is now gone. Now accepts E39 as well as Series VII filters. Very similar to previous optical formulation but according to Erwin Puts has improved contrast and hence increased apparent sharpness. New glass has been adopted and one of the cemented pairs has been split. The reader may note, to the right, that a 6/4 optical formulation has gone to 6/5. This is a noticeably improved formulation.

The Fourth optical version and the final non Aspherical design is an evolutionary improvement over the Third.

New glass is employed and the split pair is now cemented again. Further, a seventh element is added near the lens center on the image side. This final formulation is famous for having the best bo-ke or bokeh (the shape rendition of out of focus photograph areas).

Filter size	E39
Focal Length (Begin)	35mm
Type of Lens (mount[s])	Leica SM Leica M
Elements / Groups	8/6 1958; 6/4 1969; 6/5 1971; 7/5 1979
Coating Type	Coated early Sophisticated Multicoating later
Floating Element Design (non-zoom models)	No
F Stop (begin)	2.0
F Stop (End)	16
Camera Format Type	24mm X 36mm
Weight	6oz (170g) M2; 9oz (260g) "Bug Eye" M3 version
Color Scheme(s)	Black Painted Black and Chrome Black Chrome Chrome Gold Plated Titanium Plated (Tan) Platinum Plated
Date/Event of introduction	1958
Focusing System/Method (Lens)	Conventional Physical Displacement
Type of Lens Formula	Wide Angle
Type of Camera	Rangefinder (mechanical)
Aperture Mechanism	Manual
Angle of View	63 degrees
Focusing Range	28" (0.7m) to infinity

New in box with warranty papers as it came from the dealer

Indistinguishable from new but no box or no papers or both

Very close to new condition with only subtle signs of use or handling.

Extremely nice condition but does show some handling and use but no hard use whatsoever.

Excellent condition but shows some wear and use.

Perfectly Excellent operating condition but cosmetics leave something to be desired.

Usable but has mechanical, optical and cosmetic issues as indicated in individual descriptions

Issues as indicated in individual descriptions

Very significant conditions as indicated in individual descriptions. The lower end of this range is basically a paperweight that looks something like it might once have taken some pictures.