In a message dated 9/18/98 1:48:10 PM Eastern Daylight Time,
pizzuto@xxxxxxxxxxxxxxx writes:
<< I think they use a material that reflects 1/3 of the
light to the prism, and 2/3 to the film. The curtains then simply
control when the exposure occurs. >>
This is the way I understand it works too. They call it a "pellicle" mirror.
Not sure if thats a technical term or a marketing one.
Paul Schings
Coventry, RI
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