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Bahtinov masks
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13-01-2019, 05:54 PM
glend
(Glen)
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Join Date: Jun 2013
Location: Lake Macquarie
Posts: 7,051
Agreed with the last post. In AP there is a fixed focal point for the specific equipment but human eyes vary considerably. You only have to go to a Star Party or dark site trip with others to realise everyone has to focus for their eyes.
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