Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter 243-308mm
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.
- 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
- Bahtinov Focusing Mask
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