>Have you checked the correlation with shutter speed? I have an OM-4
>which exhibits exactly the behavior you describe with one exception. The
>size of the blacked out portion varies with shutter speed.
>Unfortunately, this behavior showed up on a roll where I didn't keep
>track of shutter speed, but from the particular frames with the problem
>and my recollection of the shots, it seems pretty clear that more is
>blacked out at higher speeds. I'm guessing it starts at about 1/250,
>certainly no effect at 1/60 and below.
>
>I've assumed that it is a curtain timing/speed problem that would be
>fixed with a CLA.
>
Yes, you are right. I have not systematically kept note of shutter
speeds, but recently it was particularly noticeable on a roll where
shutter speeds were consistently over 1/500.
So, CLA it will be... I'll see if Luton Camera (or another good shop
in the EU?) can fix this.
Bernard
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