Leica LTM Summar - expected behavior

[peterm1]

This has nothing to do with serial numbers. After the war Leitz had a service to upgrade and recondition prewar cameras and lenses. You could have your camera upgraded, for instance from a model I into a model III, you could get a synch and you could have your lens coated. See the sticky "Conversion" thread.

Erik.

Yes I once owned a 111a dated to 1936 and sporting an Elmer dating to 1934. Both dates were authenticated by the serial numbers although I always thought it odd that a 1936 camera had a 1934 lens. I suppose one was drawn from stock and mated to the body when it left the factory. Anyway my point is that the camera had factory synch added and the Elmer was coated. The quality and features of the work made it clear that the work was undertaken by Leith not some backyard mechanic. This was presumably done in the 1950s when that service was common.

 

[Dwig]

...I used a hood and a 36mm push-on filter. ..

It should also be noted that the increased flare caused by using a filter is substantially higher (~5-10x) when using a filter with an uncoated less. This is because the flare primarily results from reflections off the lens front element being reflected back into the lens by the rear surface of the filter. An uncoated lens has substantially higher surface reflections, hence more light for the filter to reflect back into the lens. Using a multicoated filter helps, but flare levels are still substantially higher than when both the filter and the lens are multicoated.