Re: variable size pinhole

do you think it gets small enough for a pinhole camera?
a slightly bigger one would be great for a camera obscura!
for $1.25 i guess you can't go wrong!

rob

> From: "Richard M. Koolish" <koolish@bbn.com>
> Reply-To: pinhole-discussion@pinhole.com
> Date: Thu, 17 Jan 2002 11:37:13 -0500 (EST)
> To: pinhole-discussion@pinhole.com
> Subject: [pinhole-discussion] variable size pinhole
>
> A friend showed me a gadget which might work as a variable size pinhole.
> It is a surplus iris and tiny stepper motor assembly, I assume from some
> kind of camera. There are three iris blades which can close completely,
> or open to about 1/4 inch. When very small, the hole is triangular.
> The stepper motor should probably be removed as it has detents which
> try to hold the iris at certain positions, probably larger than we want.
> The stepper motor has a spur gear which engages a gear sector on the iris,
> or there is a lever like thing which can also change the iris.
>
> It is available from All Electronics for $ 1.25 each and is item
> CAT# SMT-41 MINI STEPPER MOTOR/ IRIS MECHANISM.
>
> http://www.allelectronics.com/
>
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Received on Thu Jan 17 12:03:23 2002