William Optics Diffraction Spikes Bahtinov Focusing Mask - For Dew Shield 105 mm to 148 mm - BM-DS-GR55 Filter Adapter 25" EdgeHD optical tubes with

25" EdgeHD optical tubes with a narrow dovetail

This scope includes a bubble level and an illuminator

not at the edge

Advanced VX Instruction Manual

This "4th generation" of this eyepiece weighs 290 gram and is lighter by 80 grams than its predecessor

William Optics Diffraction Spikes Bahtinov Focusing Mask - For Dew Shield 105 mm to 148 mm - BM-DS-GR55 Filter Adapter 25" EdgeHD optical tubes withWilliam Optics Diffraction Spikes Bahtinov Focusing Mask For Dew Shield 105 mm to 148 mm William Optics Diffraction Spikes Bahtinov Focusing Mask Fits dew shields with diameters of 105 mm to 148 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