How would you do this? Perhaps some sort of adhesive mask or what?
---------- Original Message ----------------------------------
From: Michel Dusariez <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
Date: Tue, 3 Jul 2001 07:23:54 +0200
>Nice advice, two different grinds, I will use it.
>
>>This sounds as though there may be a tradeoff between fineness of
>>the groundglass and brightness of the image. Maybe it would make
>>sense to put about a 10 to 15 mm spot of very fine grind or etching
>>at the center to use for focusing, and surround it with a coaser
>>grind for a brighter image...RKS
>>
>
>--
>
>Michel DUSARIEZ
>UNLIMITED FIELDS RESEARCH PANOPTIC IMAGING asbl
>KITE AERIAL PHOTOGRAPHY WORLDWIDE ASSOCIATION - FOUNDATION
>14, Avenue Capitaine PIRET
>B-1150 BRUXELLES - BELGIUM
>Fax 32 2 512 68 29
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