In the 80's, Model Railroader published a good article on pinhole
photography. This involved mounting a tiny disc of shim brass (with pinhole
drilled in center) inside your lens, directly in front of the actual
diaphragm blades. Disc is suspended on 3 tiny legs, epoxied to the
diaphragm plate.
Wide open, the lens could "see" around the pinhole allowing you to do your
composing.
Shooting at f16, all light for the exposure would depend on what came
through the pinhole. Add OTF flash control (like 1 or 2-T32s up close) and
it's pretty nifty. Here are 2 B&W samples of my results:
www.zuiko.com/pinhole_1.htm pic is about 115K
www.zuiko.com/pinhole_2.htm pic is about 66K
----------------------------------------------------
John Hermanson www.zuiko.com
mail: omtech@xxxxxxxxx
Camtech, Olympus Sales & Service since 1977
21 South Lane, Huntington NY 11743-4714
631-424-2121 Turnaround 4-5 weeks
----------------------------------------------------
----- Original Message -----
From: "Curtis P. Hedman" <Curtis.P.Hedman-1@xxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Thursday, December 04, 2003 8:06 PM
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
>
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|