Oct 7, 2019  By Jim Lager

During my employment at E. Leitz, Inc. Rockleigh New Jersey (1971-1975) it was necessary to regularly visit the Photo Stockroom to inspect newly arrived Leica equipment. One “visit” is especially remembered. #11309 Leitz Canada M mount 35mm 1:2 Summicrons had been received and my co-worker Walter Moffatt (now deceased) and I were studying the new arrivals.

The optics, very early third computation samples just above 2641000, exhibited a protruding aperture control and scooped focusing lever without infinity lock. We noticed immediately the expected E-39 filter threads were absent. Did Leitz Canada forget to cut the threads? Was this a mistake? The presence of the 12504 lens hood suggested use of Series 7 filters. Perhaps the lack of E-39 threads was deliberate?

Leitz Canada 11309 lens 2461275 without E-39 filter threads.

When the new lenses reached customers, the Leica Technical Service received communications asking about the missing E-39 threads. Customers were not happy. They wanted to use their E-39 filters and without threads they could not. Leitz Rockleigh management was immediately alerted and subsequent production restored the threads. LHSA members who have a threadless #11309 Summicron can advise Editor Rosauer or myself. Perhaps we can ascertain how many units were prepared.



I have one of these Summicrons, Serial-No: 2461842

I have a Canadian made 35/2 Summicron, SN 2461396 with offset aperture stick and 39mm threaded mount.

Leave a Reply

Your email address will not be published. Required fields are marked *

More Story
A Full Range of Focal Lengths for Leica Screw-Mount Cameras For anyone interested in using the older Leica screw-mount cameras, it is possible to put together a full-range system of coated...