RE: Zero pinhole camera

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erobkin@uwc.edu
Date: 05/08/00-09:03:16 AM Z

If you shine a beam of light through a pinhole the image you get has
alternating rings of dark and light because of interference phenomena. A
zone plate is an idealized version of those images with the dark rings made
completely opaque and the light rings as clear as possible. Because of
interference actions light shining through the zone plate behaves like it is
going through a pinhole but the amount of light is increased.

Much detail and technical tradeoffs between pinholes and zone plates left
out.

More detail on line under a zone plate search.

ER

-----Original Message-----
From: alt-photo-process-error@skyway.usask.ca
[mailto:alt-photo-process-error@skyway.usask.ca]
Sent: Sunday, May 07, 2000 11:52 PM
To: alt-photo-process-l@skyway.usask.ca
Subject: Re: Zero pinhole camera

What exactly is the Zone plate Zeroimage talks about on
their site? It appears to be some sort of replacement
pinhole, but it's not clear.

Thanks,
Pam

James Romeo wrote:
>
> ----- Original Message -----
>
> From: jromeo@iopener.net
> To: alt-photo-process-l@usask.ca
> Subject: Zero pinhole camera
> Date: Sun, 7 May 2000 23:20:09 -0400
>
> Charlie talkes about the Zero 2000 pinhole camera.
> The camera is a work of art and great to work with.
> I bought one a few months ago from Zeroimage it is made by a craftsmen in
> Hong Kong.
> If you by it from him on line from Hong Kong it is $85.. plus $ 10
shipment air.
> You get in about a week Its 120 6x6 he is going to make some 6x9 and 6x12
> You can get a good look at it and how to order on his site
> www.zeroimage.com
> James Romeo
> ----- Original Message -----
>
... 

-- 
Pamela G. Niedermayer
Pinehill Softworks Inc.
1221 S. Congress Ave., #1225
Austin, TX 78704
512-416-1141
512-416-1440 fax
http://www.pinehill.com

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