Astrozap Bahtinov Mask – 63-139mm

Bahtinov Maskfor 2.5-Inch to 5.5-Inch (63 to 139 mm) Outside Diameter Telescopes:This AstrozapBahtinov Maskis a lightweight aluminum focusing screen with adjustable grommets. Fits telescopes with outside diameters of 2.5 to 5.5-Inch (63 to 139 mm). The thin design allows for optimal performance. The precision grid allows for perfect focus, every time. Easily fitted to the front of your telescope.

Manufacturer Product Number: 501