Gosky Bahtinov Focusing Mask for Telescopes Dew Shield Diameter from 75mm -114mm (2.95inch - 4.5nch) - for 80mm, 100mm, 102mm ED Skywatcher and Other Refractors - for More Precise and Faster Focusing

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Please be aware orders placed now will not arrive in time for Christmas, please check delivery times.

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