William Optics Diffraction Spikes Bahtinov Focusing Mask - For Dew Shield 172 mm to 235 mm - BM-DS-GR90 vendor-askar 2" ED Barlow for 2"

2" ED Barlow for 2" eyepiece receptor barrel

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

25" (threaded) eyepieces or other accessories

If you are considering an Explore Scientific Cradle Assembly as an accessory for your telescope

William Optics Diffraction Spikes Bahtinov Focusing Mask - For Dew Shield 172 mm to 235 mm - BM-DS-GR90 vendor-askar 2" ED Barlow for 2"William 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