Buckeyestargazer TriBahtinov Mask for Telescope Focus & Collimation Size:Tribahtinov-GSO8N Fitted to any standard camera

Fitted to any standard camera tripod

resulting in improved blocking of off-band light

This is especially useful when observing the Moon

however keep in mind that the blue shift data by the computer simulation indicates narrowband filter shifts its bandwidth to shorter wavelengths with faster optics than f/2

Engineered specifically for use with the SV13

Buckeyestargazer TriBahtinov Mask for Telescope Focus & Collimation Size:Tribahtinov-GSO8N Fitted to any standard cameraThe Buckeyestargazer TriBahtinov Mask combines the proven focusing precision of a traditional Bahtinov mask with the added ability to assess and fine tune collimation on telescopes with adjustable optics. Using a three zone diffraction design, the TriBahtinov pattern allows astrophotographers to achieve highly accurate focus while also identifying optical alignment errors, making it particularly valuable for SCT, RC, Maksutov, and other collimatable