Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 243mm -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.
In stock
SKU
BM-DS-GR150
$90.00
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