Have a bespoke Tri-Bahtinov mask and cover custom-made to fit your telescope.

The maximum diameter available is 390mm, which roughly corresponds to a 14" telescope. Each mask has an oversized finger tab and is white for easy handling in the dark. Please note that due to normal design limitations the mask will not be a snug fit. It will sit loosely but securely on the end of the telescope.

When ordering, please fill in the fields to let me know the inside diameter of the ring at the front end of your telescope, and the focal length so I can optimise the pattern (if you use a focal reducer, include that). A photograph of the end of your telescope would be helpful too (please email to sales@astroprinter.co.uk). Alternatively, you can choose from the list of masks I have already made.

A bespoke mask (and cover for checking collimation) will be 3D-printed from durable, environmentally-friendly PLA plastic.

Credit to Satoru Takagi, C. Y. Tan et al for their work on this design.

Check the list below to see if your mask has already been made to avoid measuring! Celestron NexStar 90SLT Celestron NexStar 4SE Celestron NexStar 127SLT Celestron Astromaster 130EQ Celestron Evolution 6 Celestron C8 Celestron Evolution 8 Celestron Advanced VX 8" Celestron 8" SE

Celestron 8" EdgeHD Celestron Evolution 9.25" Celestron 9.25" XLT Celestron C11 Celestron CPC 1100 Meade LXD55 6" Meade LX85 8" Meade LX90 8" Meade LX90 10" Meade LX6 8" Meade LX200 8" Meade LX10 8" Meade LX200 10" Meade RCX-400 10" Meade LX850 14" Orion Optics UK VX6 Orion Optics UK OMC140 Orion XT8 Orion XT10 SharpStar 150mm f/2.8 HNT astrograph Sky-Watcher Skymax 90 Sky-Watcher Skymax 127 Sky-Watcher Skymax 180 Sky-Watcher StarQuest 130P Sky-Watcher 130P Sky-Watcher 150P Sky-Watcher 200P (Pictured) Sky-Watcher Flextube 250P StellaLyra 6" f/12 M-CRF Classical Cassegrain TAL 150P Vixen R130S