Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter from 105mm -148mm
Product ID: 69881829
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Description
Optical transmission: 92% and above
Made with optical grade PMMA material
Easy to mount on 3" – 4.2" refractor telescope
William Optics Diffraction Spikes is an ultra high optical transmission Bahtinov mask which produces the clearest, brightest and longest diffraction spikes facilitating focusing with ease and accuracy.
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Khalid Z.
Great experience from order to delivery. Highly recommended!
1 week ago
Ali H.
Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.
