William Optics Diffraction Spikes Bahtinov Focusing Mask - For Dew Shield 172 mm to 235 mm - BM-DS-GR90 vendor-askar CNC machined with red/black anodized

CNC machined with red/black anodized finish

25" (threaded) eyepieces or other accessories

This TeleGizmos Truss Tube Dob Cover is designed to fit a 24"- 25" f/5 Truss Tube Dobsonian Scope in a low park position

2" ED Barlow for 2" eyepiece receptor barrel

TE-14WD and TE-17HD eyepieces

William Optics Diffraction Spikes Bahtinov Focusing Mask - For Dew Shield 172 mm to 235 mm - BM-DS-GR90 vendor-askar CNC machined with red/black anodizedWilliam 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