how to put a hole in film canisters

Hello All,

Nick, for your question about how to cut a hole in your film
canisters--- could you try using a heated tool? Since you are working
with adults this might be the ticket. Plastic melts well. You might try
an old soldering tool or an adjustable temperature wood burner. I have
not done this so watch for fumes or fire.

Some where may postings ago a fellow pinholer used a heated needle and
black construction paper to create a pinhole lens. This might be an
option as well for your group.

There is a company (electron microscopy sciences) that sells electron
microscope apertures. They are called "single slot grids (aperture
grids)" Tom Miller turned me onto them. They are about the size of a
hole punch with the aperture etched into the center. The material of
the aperture is a very thin copper foil. I cannot place my hands on the
chart of sizes. But I believe that they are sized in (um) as a
measurement for the aperture.

http//:www.emsdiasum.com

Above is their general link.

I wish you the best with your workshops. To teach a teacher gives you a
chance to reach all young people they will teach. I commend you!

eric r. nelson
marshfield junior high school
marshfield, wisconsin

On Aug 25, 2004, at 9:57 AM, Nick Dvoracek wrote:

> I guess I'll try to keep up the renewed activity on the list.
>
> In November, I'm going to do a workshop with regular Elementary
> Education majors in their required Art Ed. course.
>
> I have three groups of about 30. Each group has two two-hour sessions.
>
> I'm interested in using empty film canister cameras because it's about
> the easiest and cheapest way to get a light tight container without
> painting or construction.
>
> I have a couple questions. How do you drill a .3mm pinhole? I've
> always used .5mm pinholes drilled with a number 10 needle and that
> seems like a little big for such a small negative.
>
> Also, how do you cut a hole in the canister to install the pinhole.
> That plastic can be pretty tough and using a knife sounds dangerous.
> Would an electric drill with a quarter inch bit work?
>
> Nick
> ----------------------------------------------------------------------
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Received on Wed Aug 25 19:22:40 2004