Lens serial numbers by year (we should put this in the Wiki)
LeicaLenses serial number and production year - Leica Objektiv Serienummer
I have a Summitar, it came with a IIIf I acquired last autumn. Works fine on the M8, collapses too. The Summitar doesn't have click stops for the aperture settings, I believe the 'Cron has. Overall the handeling of the 'Cron will be better. The Summitar needs a hood to help with flare. and the one that was made for it is ridiculous, SOOFM I beleive.
From what I read, a 1966 'Cron will be a better lens in all aspects, but the Summitar will probably give you more of an older look simply because it is an older design. Flare etc will depend on when your lens was made.
I'm attaching some Summitar shots. My lens is from 1951. The first one is wide open, the second and third ones I'm not sure, probably around f4. These are all qick and dirty conversions in C1v4 straight to forum sized JPGs. The only processing I did was to set the WB.
Early morning in October at Lysaker outside Oslo.
L1004229_3.jpg
L1004246.jpg
L1004254.jpg
- Carl