Cheshire Collimator for Newtonian Telescopes
Design preview. Rendered from the file, not a photo.
The maker says it fits: Newtonian/Printonian telescope. See the proof
This model is not currently offered as a verified ready to buy print.
What it does
- Aligns your telescope mirrors easily so you see sharp, clear images.
- Fits in your eyepiece holder, meaning you can check alignment without tools.
- Costs far less than a laser collimator, so you save money on setup.
- Works with any Newtonian telescope, giving you one tool for all your scopes.
Your telescope shows blurry stars when mirrors fall out of line. This collimator lets you fix that fast. You look through the eyepiece, spot the mirrors inside, and adjust them until they line up perfectly.
The Cheshire collimator sits in your scope just like a regular eyepiece. You dial in your primary and secondary mirrors without needing extra equipment. It works on any Newtonian telescope you own. Online guides walk you through the steps so you get great results the first time.
Print it on demand and get it ready to use in days, not weeks.
7.1k downloads in the maker community. That is interest in the design on the site it came from, not our sales.
What it fits
The maker says it fits: Newtonian/Printonian telescope
That is the maker's word, not a fit we measured. Check the size below against your own.
- Newtonian/Printonian telescopeFrom the maker's own listing title, checked 2026-08-13. See the original post
Brand names here only say what this part fits. We are not connected to those companies, and they did not make or check this part.
What you get
- This design prints as one piece.
- Nothing else to print or buy for this to work.
What it is made of
Designs like this print well in PLA. Compare the materials.
Printed plastic is strong for its size, but it is not metal. We have not load tested this design, so we do not publish a weight rating. Keep it out of a hot car and away from open flame.
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Who made this design
Designed by Lanthan. We did not draw it.
Shared under GNU GPL. See the original design