Re: Various topics: M4 leak

[bfranson@xxxxxxxxxxxx (Bill Franson)]

you wrote:
>Some short reactions to  recent topics:
>
>IR leak with LEICA M4: I use a M3 (when I manage to put the film in!)
>and never had this kind of trouble with the shutter. Also, if the
>problem comes from the shutter, why should it only happen when you
>change the lens (you don't ALWAYS have your lens cap on)


I think because one gets a flood of light instead of a trickle. I tested
the camera with Tmax 400 yesterday with lens off and light shining into
body for various times up to 12 minutes. Sure enough, I duplicated what I
saw on the original negs. Called Leica and am shipping the body back today.
Hope it isn't in repair for another 7 weeks! By the way, I think using
infrared film to test for leaks makes good sense after seeing the results
on Tmax; Leak traces with infrared really bloomed compared to weak traces
on Tmax.

Bill

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