Thread: Filter Affect on Flattener Spacing
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Old 16-07-2016, 12:29 AM
ericwbenson (Eric)
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Join Date: Sep 2009
Location: Adelaide, Australia
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FWIW on my website I have the derivation of the focus shift induced by an optical window in a converging beam. See here:

http://www.faintgalaxy.com/focusshift.htm

Regards,
EB
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