This an 80mm objective diameter, 330mm focal length refractor telescope. It is a work in progress, but it should be functional as-is with some fuss and fitting. each section is small enough to be printed on a Prusa Mini. It uses this 1.25" crawford focuser and a cheap lens off I got off ebay. Additionally a 1.25" diagonal and eyepieces are required to make this functional.

The lens is 82mm is diameter and I measured its focal length at 316mm. I do get some chromatic aberrations as is typical with lens of this type. Overall this is a cheap and relatively fast scope with reasonable image quality.

So far I have only printed this in PLA, and I will report back if I have any issues. A variety of M3 and M4 screws and threaded inserts are also required for assembly. Additionally one ¼ 20 threaded insert is required for the tripod mount. Four springs are needed for the lens cap.

Update 7/19/2022: so far the PLA has held up fine. It survived a week long RV trip being bounced around on dirt roads. Optically there is some chromatic aberration, but it seems fine for visual observation.

Update 9/1/2022: Still no issues with the PLA. I have updated the scope rings, handle, and mounting piece. The new design is lower profile and a bit more refined.

Update 10/5/2023: As requested, I have posted the f3d file for the telescope. Feel free to make your own remix. But as fair warning, I used this project to learn Fusion 360, so the time line is a bit of a mess.