3D printed accessories for hassle-free astrophotography

Made in Germany - Shipped from Germany

Tri-Bahtinov Mask for Focusing and Collimation Control for Celestron EdgeHD 800 8″

A Bahtinov mask with a special pattern for reflector telescopes. It allows easier focusing and collimation control at the same time.

(use the arrows on the left and right sides in the middle of the frame to scroll through pictures)

This mask fits on the Celestron EdgeHD 800 telescope. Is it based on my design for GSO RC8 and was co-developed with an owner of the Celestron EdgeHD 800 telescope.

The mask pattern is calculated according to an improved formula and brings better illumination, see the discussion on Cloudy Nights forum and the original design on GitHub.

The mask was calculated for the 2000mm focal length. It additionally has two handles to make it easier to take it out.

Please note that:

  • the mask is created in two parts, which are then glued. Traces of glue along the border between the parts are possible. But this does not affect the function of the mask.
  • the mask is 3D-printed, and the material of the mask is sensitive to intense heat.  The mask should not be left in direct sunlight, for example. Well, this should not be a problem for astrophotography 😉

If you have questions, feedback or suggestions for custom changes, please contact us using this form.


VAT exempted according to UStG §19
Delivery Time: ca. 3-4 workdays
Additional costs (e.g. for customs or taxes) may occur when shipping to non-EU countries.