Pay in 4 interest-free payments of $14.75 Learn more
Ships within 48 hours · Estimated delivery Sep 14 - Sep 19
25 arcsec RMS (EC)
Built-in WiFi and LAN for remote operation
car license plate
The goal is to allow the telescope to virtually 'disappear
Bahtinov Focusing Mask Ritchey-Chrétien 25 arcsec RMS (EC)The new Optical acrylic sheet offers 92% of light transmission that gave you the highest and brightest diffraction Spikes for Focusing about 3 times brighter than traditional bahtinov masks! Includes metal pegs to hang the mask over the front dew shield while focusing. Select the size appropriate for your telescope or lens. Model MM Inches BM DS GR45 75 110 2. 9 4. 3 BM DS GR55 105 148 4. 1 5. 8 BM DS GR90 172 235 6. 7 9. 2 BM DS GR150 243 308 9. 5
