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Old 16-08-2020, 11:18 PM
tomfield (Tom)
Field Tested Systems

tomfield is offline
Join Date: Sep 2010
Location: Seattle, WA USA
Posts: 6
First, check that you have the grating mounted properly at

Then see Section 5 on focusing in the pdf here


Last edited by tomfield; 16-08-2020 at 11:54 PM.
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