At 09:05 AM 18-01-00 Tuesday -0500, Skip wrote:
For Leica lenses, here's the scoop on the names and what lenses they
represent.
50/2 Summitar: 1939-53, Screw Mount (LTM) only, Collapsable only. Large
front element to reduce vignetting.
50/2 Summicron 1953-present, LTM and M-mount, Collapsable and Rigid
mounts. First Leitz lens to use high-refractive lanthanum glass elements
for superior color correction. Several version since then. Bellweather
lens for 50mm quality.
35/3.5 Summaron: 1949-58: LTM and M mounts
35/2.8 Summaron: 1958-6?: LTM and M mounts, used HR lanthanum glass,
superceded rapidly by 35/2 Summicron, rare lens, especially in LTM.
35/2 Summicron: 1958-Present: LTM and M mounts, used HR lanthanum glass,
at least 4 optical variations, including aspherical surfaces introduced in
1997 (I think).
So in general, Summicron is the best formulation. Leitz used to have
different names depending on the optical formula, but now they just use
the names to represent the aperture, so F/1.4 is Summilux, F/2 is
Summicron, F2.8 is Elmarit, etc. with slight variations like the short
90/2.8 and 90/4 were Tele-Elmarits.
Skip
My 50mm / f1.5 Summarit .......complete with two original rectangular metal
hoods ....... feels left out of the parade of names ...:-((
jh
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