Pinhole Sieve (was Re: infrared pinhole)

George L Smyth wrote:
> Don't forget to give pinhole sieve a try
> (http://glsmyth.com/Pinhole/Images/PinholeImages.htm). It is faster
> than pinhole (similar to zone plate) and gives a very ethereal
> effect.

Does the pinhole sieve have to be focused like a zone plate does?

-- 
Brian Reynolds                  | "It's just like flying a spaceship.
reynolds@panix.com              |  You push some buttons and see
http://www.panix.com/~reynolds/ |  what happens." -- Zapp Brannigan
NAR# 54438                      |  
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