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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TrustScore 4.5 | 7,300+ reviews
Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.
1 day ago
The product exactly matches the description. Very satisfied with my purchase.
5 days ago
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