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Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 105mm -148mm
BM-DS-GR55
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Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 172mm -235mm
BM-DS-GR90
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Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 243mm -308mm
BM-DS-GR150
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Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 75mm -110mm
BM-DS-GR45
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