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Hi Trevor
I find it quite inspirational that even in this era dominated by sophisticated, expensive, high-tech equipment, such a relatively simple and passive focusing aid like the Bahtinov Mask, has had such an impact on our hobby.
Pavel Bahtinov’s remarkable contribution to achieving perfect focus, with such accuracy and ease, through the use of such a simple tool, will surely go down in history as one of the most significant advances in amateur astronomy - a brilliant aid to focusing.
Cheers
Dennis
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