William Optics Diffraction Spikes Bahtinov Focusing Mask - For Dew Shield 172 mm to 235 mm - BM-DS-GR90 vendor-askar industrial grade components have been

industrial grade components have been used throughout the camera's three double-sided populated circuit boards

even when paired with optional accessories

4" (with 2-inch diagonal) Weight OTA/Std

2" ED Barlow for 2" eyepiece receptor barrel

25" (threaded) eyepieces or other accessories

William Optics Diffraction Spikes Bahtinov Focusing Mask - For Dew Shield 172 mm to 235 mm - BM-DS-GR90 vendor-askar industrial grade components have beenWilliam Optics Diffraction Spikes Bahtinov Focusing Mask For Dew Shield 172 mm to 235 mm William Optics Diffraction Spikes Bahtinov Focusing Mask Fits dew shields with diameters of 172 mm to 235 mm Clear Acrylic Sheet design provides 92% light transmission Gives the Brightest diffraction spikes for focusing This is a William Optics Diffraction Spikes Bahtinov Focusing Mask made from Acrylic material, which is high in light transmission. This design