StarField Bahtinov Mask - 80 mm - FM-80 130 mm Telescopes 25" or 2" Round Mounted

25" or 2" Round Mounted Filter from the dropdown

compact Features: Neutral Color

with performance parameters giving it the fundamental characteristics (the ethos) of a Tele Vue eyepiece: high contrast

Celestron Product Number: 31042

A laser engraved center mark of the main mirror allows easy adjustment

StarField Bahtinov Mask - 80 mm - FM-80 130 mm Telescopes 25" or 2" Round MountedThis StarField Bahtinov Mask is sized for 80 mm telescopes and fits dew shields with an outside diameter of 87 mm to 105 mm. While basic, often home made focus masks have been used for quite some time, the Bahtinov mask, with it's distinctive pattern, is unique. Invented by Russian amateur astronomer Pavel Bahtinov, this mask has quickly become the astro imager's choice for fine focusing a telescope. To use, place the Bahtinov mask in front of the