P3D Re: VM light leaks

[roberts@xxxxxxxxxxxxxxxxx (John W Roberts)]

>Date: Tue, 16 Mar 1999 06:23:29 -0700
>From: JNorman805@xxxxxxx
>Subject: P3D VM light leaks

>Jeremy writes:

><< With all this talk about not changing shutter speeds on cameras once
> they are wound or cocked, I was wondering: is it okay to change the
> shutter speed on a VM Personal once it is wound?  Because winding
> after each picture prevents light leaks through the shutter blades. >>

>Does winding after each shot actually prevent light leaks through the shutter
>blades, or does it simply prevent light from leaking onto the frames that
>you've just exposed?  If the latter, aren't you concerned about light leaking
>onto the frames waiting to be exposed after you've wound the film but before
>you've taken the next shot?

I seem to recall statements on P3D that exposed film is more sensitive to
light leaks than unexposed film (reciprocity failure??). If that's the
case, it would seem to make more sense to let the unexposed film take the
risk of the light leaks.

John R


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