Bahtinov mask for Maksutov 127mm

thingiverse

I customized a Bahtinov mask for my Maksutov-Cassegrain 127mm telescope, made by Bresser Messier. However, this design could also fit other scopes with an identical 143mm diameter front thread. I created the design using a generator on the website astrojargon.net/MaskGen.aspx and added a spring-loaded tab to secure it to the internal threads - although, in reality, you usually place the mask pointing upwards, so this feature isn't entirely necessary. The Bahtinov mask fits snugly inside the telescope's tube, preventing it from interfering with the dew cap.