StarField Bahtinov Mask - 120 mm - FM-120 2" Barlow 25" Optical Tube Soft Case

25" Optical Tube Soft Case is constructed from 900 denier polyester for durability and weather resistance

This eyepiece’s 4

It is made to the highest quality standards with Zeiss glass

Engage children of all ages with STEM toys that will encourage them to explore

StarField Bahtinov Mask - 120 mm - FM-120 2" Barlow 25" Optical Tube Soft CaseThis StarField Bahtinov Mask is sized for 105 mm 125 mm telescopes and fits dew shields with an outside diameter of 120 mm to 152 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