StarField Bahtinov Mask - 80 mm - FM-80 130 mm Telescopes zero backlash Declination Worm Wheel:

zero backlash Declination Worm Wheel: 360 teeth

to put the object into the field of view of your telescope

Stationary latitude knob with a newly-designed linkage system greatly reduces the amount of friction when polar aligning the mount

Celestron Product Number: 31042

compact Features: Neutral Color

StarField Bahtinov Mask - 80 mm - FM-80 130 mm Telescopes zero backlash Declination Worm Wheel:This 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