William Optics Bahtinov Mask for Dew Shield ~diameter 243mm to 308mm

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About this product

New William Optics bahtinov focusing mask made of acrylic sheet which maximises light transmission for ease of use.

The new Optical acrylic sheet offers 92% of light transmission that gave you the highest and brightest diffraction Spikes for Focusing !

It’s approx 3 times brighter than a traditional metal mask.

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