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 ÂĽ 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.
80mm Refractor Telescope
by Fantastic Plastic Person · original on Printables ↗
Learning / Physics & Astronomy
♥ 149⬇ 528🖨 5 prints
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Lens Cell inner.stlDEFAULT
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Lens Cell outer.stl
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Telecope Body.stl
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Lens hood.stl
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Lens cap.stl
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lens cap plate.stl
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lens cap pawl.stl
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Inner Ring.stl
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Outer Ring.stl
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bottom mount.stl
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handle.stl
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