3D printed accessories for hassle-free astrophotography

Made in Germany - Shipped from Germany

Tri-Bahtinov Inlay Mask for Focusing and Collimation Control for Celestron C8 Telescopes

A Bahtinov mask with a special pattern for reflecting 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 C8 telescope. Is it based on my design for GSO RC8 and was co-developed with a owner of Celestron C8 telescope.

The special feature of the mask is that it can be stored under the cover of the telescope, which is very convenient.

The pattern of the mask 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 and cut offs on the side for better fitting. It still fits under the cover and can be stored that way so that you do not need additional box for it and never forget it ๐Ÿ˜‰

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 heat. It starts deforming at temperatures above 50หšC. The mask should not be left in the sun, for example. Well, this should not be a problem for astrophotography ๐Ÿ˜‰

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


VAT exempted according to UStG ยง19
Delivery Time: ca. 3-4 workdays
Additional costs (e.g. for customs or taxes) may occur when shipping to non-EU countries.