William Optics Gold Bahtinov Mask Cover For ZenithStar 61 Telescope - CPBM-61GD 90 Degree Diagonals Machined aluminum housing: Computer assisted

Machined aluminum housing: Computer assisted CNC machined aluminum housing for precise spacing and alignment of the optical elements

8 X Reducer/Flattener for 102 Scopes Features

Polarizing SINGLE OR SET

but also for any outdoor observing

Real-time Periodic Error Correction (RPEC)

William Optics Gold Bahtinov Mask Cover For ZenithStar 61 Telescope - CPBM-61GD 90 Degree Diagonals Machined aluminum housing: Computer assistedWilliam Optics Gold Bahtinov Mask Cover For WO ZenithStar 61 Telescope William Optics Bahtinov Focusing Mask and Dust Cap Innovative Design combines Dust Cover and a Bahtinov Mask in one Fits WO ZenithStar 61 Telescope Clear Acrylic Sheet design provides 92% light transmission Gives the Brightest diffraction spikes to assist focusing This is a William Optics Gold Bahtinov Focusing Mask and Dust Cap, made from Acrylic material, which is high in light