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Re: [OM] OM Pin-hole photography problem - help!

Subject: Re: [OM] OM Pin-hole photography problem - help!
From: petertje@xxxxxxxxxxxxx
Date: Fri, 5 Dec 2003 19:36:25 +0200
Hi,

> I decided to try pin-hole photography with my OMs recently... I bought a 
> body cap with a drilled piece of stainless steel in the center. When I 
> tried it out on my -4T, I expected a pretty long "open shutter" time, given 
> the f/stop is on the order of 180 or so. To my surprise, almost every 
> exposure I tried clicked off at about 12-14 seconds, regardless of what I 
> pointed the camera at. Is there something I'm missing? Is there some tab or 
> coupling pin on the back of the OM lenses that enables OTF metering - the 
> modified lens cap obviously does nothing except engage the three bayonet 
> lugs... Any suggestions on what I can do to make this work? I'm thinking 
> about trying a short extension tube between the body and the cap...

I've got exactly the same setup.  The good thing about mine, is that I know my 
pinhole is 0.1mm, and about 5 cm away from the film, making it f512.  But I've 
tried auto-exposure too, on slide, and it came out great on the first attempt.  
Even better: when I turned the exposure compensation dial for an extra stop, it 
came out over-exposed.  That was 8 and 16 seconds resp.

Great little meter in the OM-4Ti :-)


Peter.



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