Re: Pinholing with SLR and extension tubes

Works fine for me. I use black foamcore cut into circles for the pinhole
"holder." Mostly I use this technique with zoneplates and put an
additional tube on the front as a lens shade. this also allows for easy
comparison testing of different size pinholes. I use old Leica
threadmount tubes on my old leica, they are inexpensive and seem to come
in a good range of sizes. One could also use the black plastic plumbing
pipe or cardboard mailing tubes.
Howard Wells

> Dennis Johanson wrote:
>
> This week I got an old SLR back from service, and I have a set of
> extension tubes for it. An idea came to my mind, namely to use one or
> more of the extension tubes with a pinholed lens cap or aluminum foil
> at front. I could even get a second extension tube set and use these
> ones separately as front tubes with permanent holes of different
> diameters that would fit different combinations of the other tube
> set.
>
> Probably someone has tried this already, and if so I would be very
> interested in learning the outcome of it as well as in getting some
> suggestions for improving my idea.
>
> The best way is to try it out myself, but hey, I am the guy presently
> converting a (too small) guest toilet into a darkroom, and that keeps
> me busy enough for the moment.
>
> Dennis
Received on Sat Feb 2 09:28:13 2002