William Optics Gold Bahtinov Mask Cover For ZenithStar 61 Telescope - CPBM-61GD Kite Optics Monoculars individually adjustable power output for

individually adjustable power output for up to 4 heaters

It has been rigorously tested to meet The American Society for Testing and Materials (ASTM) standards

or "focal extenders" for objectives

center and edge

PERFORMANCE - For objects near the Meridian (imaginary line passing from North to South)

William Optics Gold Bahtinov Mask Cover For ZenithStar 61 Telescope - CPBM-61GD Kite Optics Monoculars individually adjustable power output forWilliam 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