Re: Zone plates for a body cap

----- Original Message -----
From: "Beaker" <mbeacom@mac.com>

> I'm thinking of getting a sheet of Zone Plates made for a Pentax K
> mount body cap (optimized for 43 mm). Would anyone be interested in
> buying any? The reason I ask, the negative will cost something like $50
> to $75, (the shop has a $50 minimum.) and I would like to spread the
> cost out a little. For a little more to cover the cost of a body cap, I
> could send out the finished article. The negative isn't made yet- I'm
> just trying to gauge the interest, so the price is still "to be
> determined".

A sheet made by an image setter can fit lots of ZPs, you don't have to have
the whole sheet full of 43mm ZPs, I would suggest you make some other focal
lengths as well. 65mm for instance is perfect for attaching it to the back
of the shutter of a Lubitel. Another possibility, which is not mutually
exclusive with the one previously mentioned, is to make similar focal
lengths ZPs but with different number of rings, which will give you
different f/stops, I.E., a 43mm ZP with 9 total rings is f/64 (aprox) but a
19 rings one is f/45 and would probably have more of that ghostly effect.

I make my own ZPs using lith film, otherwise I'd be joining you,
nevertheless I recognize this as a good chance for those that have not
experimented zoneplate photography to try it with very minimum investment
and help you share the cost in the process, a win/win scenario if you ask
me.

Good luck.

Guillermo
Received on Thu Oct 24 22:28:43 2002