Re: more on the variable pinhole

I've got a couple of these too- you can get them at Active Surplus in
Toronto.
Just pulled them out to have a look, you can actually make quite a small
pinhole with the aperture. Getting it to stay in one spot is tricky, perhaps
a bit of brass shim inder the lever part, to increase the friction might
work. To use it as shutter for another pinhole would work nicely, you could
automate it using a microcontroller such as the Basic Stamp, or PIC, to take
unattended pictures.

----- Original Message -----
From: Richard M. Koolish <koolish@bbn.com>
To: <pinhole-discussion@pinhole.com>
Sent: Friday, January 18, 2002 10:02 AM
Subject: [pinhole-discussion] more on the variable pinhole

> Yesterday I mentioned the iris/motor assembly from All Electronics. I
looked at
> it more closely last night. The motor comes off easily by removing two
small
> screws. That leaves the iris assembly by itself. Besides the gear sector
that
> drives the iris, there is also a small lever. You could glue an extension
to the
> lever to easily control the iris. Without the motor, the iris moves
easily and
> closes completely. I could not see any light coming through the assembly
when
> it is completely closed, so it might make a nice shutter for a pinhole
camera.
> I'll try and get some pictures of it.
>
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Received on Sat Jan 19 10:01:28 2002