William Optics

Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 105mm -148mm

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Your Price: $69.99
Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 105mm -148mm
SKU:
BM-DS-GR55
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Product Overview

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.

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