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Astrophotography
Focus Masks
William Optics
Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 172mm -235mm
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Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 172mm -235mm
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$97.99
Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 172mm -235mm
Part Number:
BM-DS-GR90
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Description
The new Optical acrylic sheet offers 92% of light transmission that gave you the highest and brightest diffraction Spikes for Focusing !
It’s about 3 times brighter than traditional metal type.
For dewshields 172mm -235mm
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