Thread: A question about flocal lenghth.
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Old 14-10-2011, 05:23 PM
Barrykgerdes
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Barrykgerdes is offline 		 
Join Date: Feb 2007
Location: Beaumont Hills NSW
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Tecnically the focal length will be changed by .8x for calculations of FOV but using a field flattener on the focuser will not change the physical length of the focal path by more than a few centimeters.

Barry
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