New feature is added to make sure Astronomy reach's even to those who are low in budget.So used items related to astronomy section is added in site.

focusing aid

We sell Bahtinov Mask, Tri-Bahtinov Mask, Carey mask and Hartmann mask. The product can be customized

according to your needs.

tri-bahtinov mask

If you are interested in collimation, you may consider the tri-bahtinov mask.

A Tri-Bahtinov Mask for Aiding Collimation and Focusing of Schmidt Cassegrain, Ritchey-Chretien, and Newtonian Telescopes.

Bahtinov Mask

Example diffraction patterns produced by a Bahtinov mask

(middle: in focus, left and right: slightly out of focus)

The Bahtinov mask is a device used to focus small astronomical telescopes accurately. Although masks have long been used as focusing aids, the distinctive pattern was invented by Russian amateur astrophotographer Pavel Bahtinov in 2005.Precise focusing of telescopes and astrographs is critical to performing astrophotography.

The telescope is pointed at a bright star, and a mask is placed in front of the telescope's objective (or in front of the aperture).