William Optics Diffraction Spikes Bahtinov Focusing Mask - For Telescope Tube/Dewshield Diameter from 172-235mm (6.77"-9.25")
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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.
- Optical transmission: 92% and above (about 3 times brighter than traditional metal masks)
- Made with optical grade PMMA acrylic material
- Easy to mount on many telescopes that have an outside tube or dewshield diameter of 172mm – 235mm (6.77" – 9.25")
Other Information
- Country of Manufacture: Taiwan
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.
- Optical transmission: 92% and above (about 3 times brighter than traditional metal masks)
- Made with optical grade PMMA acrylic material
- Easy to mount on many telescopes that have an outside tube or dewshield diameter of 172mm – 235mm (6.77" – 9.25")
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.
- Optical transmission: 92% and above (about 3 times brighter than traditional metal masks)
- Made with optical grade PMMA acrylic material
- Easy to mount on many telescopes that have an outside tube or dewshield diameter of 172mm – 235mm (6.77" – 9.25")
Other Information
- Country of Manufacture: Taiwan
William Optics Diffraction Spikes Bahtinov Focusing Mask - For Telescope Tube/Dewshield Diameter from 172-235mm (6.77"-9.25")