Re: minimum zone plate focal length?

As with all things pinhole, the rule is "try it!' My understanding is that
zone plates of focal length less than 75mm are unreliably small to make.
----- Original Message -----
From: "TSHACK" <TSHACK@SILVER-BAYOU.COM>
To: <pinhole-discussion@pinhole.com>
Sent: Friday, October 19, 2001 12:36 PM
Subject: [pinhole-discussion] minimum zone plate focal length?

> What is the minimum zone plate focal length? Short enough to work on a
> Holga?
>
> dwight
>
>
>
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Received on Fri Oct 19 14:14:48 2001