Hi,
I'm not sure about making a permanent pinhole in your lens, But I've tried
pinhole
before with a Leica M6. Instead of drilling, I sanded down a small hole in a
body
cap. This method is cheaper but more difficult, but you have more control than
with
a drill (unless you find a very small drill bit). The other method involves
making
a big hole in the body cap and then covering it with foil, blackening the
surface
of the foil, then pricking a hole in with a pin. In my experience there are 2
disadvantages to this method. It is more difficult to make a small hole and
also it
is difficult to transport as the foil tends to lose its rigidity and slacken.
I chose a rangefinder over an SLR for this project because of the relative ease
of
composition. I metered with a handheld meter after doing some exposre tests.
Here are two pictures made this way.
http://www.geocities.com/leicanut/PINHOLE.HTML
I dont think I will be trying this with my OM's, I wont be able to see anything
in
the viewfinder !
--adi
Wayne Culberson wrote:
> Okay, this is going to be long, and maybe contain stupid questons, so
> you may want to skip it if short on patience :-)
> I recently had a Zuiko 50/1.8 SN come with (an OM1) ebay purchase, which
> had spidery fungus. I was about to throw it out, but decided to play
> with it first to see if it could be salvaged for a loupe perhaps.
> Anyways, using a rubber band for a grip I was able to get out 3 lens
> elements from the front. I cleaned up everything with ascetic acid
> (white vinegar), then alcohol, then windex, and reassembled. Luckily the
> fungus was on the surfaces I could get at. I also took off some metal
> parts from the back also, and swabbed everything with vinegar. I've shot
> some with the lens since, and can't see any difference on 4x5 prints
> from my other 1.8 "made in Japan' variety. I presently have the thing
> quarantined from my other lenses and am giving it regular sun/UV baths.
> What I'd like to try with it is making a pin hole lens. A few years
> ago, when my son was into model railroading, we visited with a fellow
> from Saint John who made a pin hole lens from a C*n*n lens. He shoots
> model railroad scenics with it, and has had some photo stories published
> in model railroad magazines, plus a good number of front cover photos. I
> remember he briefly explained to me taking the lens apart and adding a
> permament small aperture, which gave him the extreme DOF needed for
> shooting model railroad scenics.
> I am wondering if any one has tried making one of these. If so, I
> could
> use some advice. I am thinking of perhaps making a small round tin plate
> (maybe from the top of a tin can?), which I can then drill a very small
> hole in the center of, and blacken it all with a felt tip marker. Then
> I'd take the lens apart again and and put this in for a new fixed
> aperture, as close to the other aperture blades as I can get it.
> Some questions:
> 1. Any chance this will work?
> 2. Should I permanently set the other blades at f/16 and permanently
> hold down the DOF button to prevent possible camera damage? I know
> things have to move in the lens when the camera is fired, and this new
> aperture might jam the other ones??
> 3. Would I also need to use close up diopters with a normal 50/1.8 to do
> this kind of close up photography, or could I use my vivitar macro focus
> 2x?
> 4. How would metering work? I have a 2s coming, would it do it
> automatically up to a couple minutes like I hear say the 2n does?
> 5. How would focusing work with the darkness you'd get at extreme small
> apertures? Could I focus with another 50/1.8, then switch lens and set
> to the same distance, or would this be too inaccurate?
>
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