TPO RC6 Tri-Bahtinov Focus and Collimation Mask

thingiverse

Tri-Bahtinov focus and collimating mask for a TPO 6" f/9 Ritchey Chretien Reflecting OTA Telescope. I saw tri-bahtinov masks for the RC8 but none for the 6" so I made this one. I tested it and it works great. This mask is based off of the github project. This particular mask is based on the original design as the diffraction spikes are sharper and easier for me to see. The modified version may have better sensitivity, but I liked this version better. https://github.com/cytan299/tribahtinov Use: Just use the guides on the back of the mask to center on the spider vein that align with one of the collimating knobs. I have Bob's knobs on mine. Center on a bright star and take 5+ second exposure. See above link for more in depth usage. Bonus: the mask fits snaps in the dew cap! It's a little tight, but better tight than falling out. Printing: I printed this with an Ender 3 using PLA and sliced it in CURA using the default settings. Takes about 6.5 hours to print.