Buckeyestargazer TriBahtinov Mask for Telescope Focus & Collimation Size:Tribahtinov-GSO8N Whether you're a weekend adventurer

Whether you're a weekend adventurer or a full-time nomad

Lay the wheel down flat

Mounting tool and screws for easy installation

resulting in improved blocking of off-band light

Male) Mechanical Thickness 2 mm Material Anodised aluminium Internal Finish Matte black Application Astrophotography

Buckeyestargazer TriBahtinov Mask for Telescope Focus & Collimation Size:Tribahtinov-GSO8N Whether you're a weekend adventurerThe 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