There is a tab on any OM mount lens which reports the aperture set on the
lens. If you don't have a pin engaged with the aperture reporting cam on
the body, you will get up to 6/7 stops overexposure. Try a 7mm manual
extension tube, which has the fixed pin to do the necessary.
Piers
-----Original Message-----
From: owner-olympus@xxxxxxxxxxxxxxx [mailto:owner-olympus@xxxxxxxxxxxxxxx]
On Behalf Of Curtis P. Hedman
Sent: 05 December 2003 01:06
To: olympus@xxxxxxxxxxxxxxx
Subject: [OM] OM Pin-hole photography problem - help!
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...
Any thoughts or guidance will be appreciated!
Curt
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