Is this 3D model free to download?

Yes, Cheshire Collimator (0.965", 1.25", 2.0") is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by agrif, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

Cheshire Collimator (0.965", 1.25", 2.0") 3D printable model by agrif

Cheshire Collimator (0.965", 1.25", 2.0") photo 1

Cheshire Collimator (0.965", 1.25", 2.0") photo 2

Cheshire Collimator (0.965", 1.25", 2.0")

Source: Thingiverse by agrif

The Cheshire Collimator (0.965", 1.25", 2.0") is a free printable 3D model from Thingiverse by agrif. A simple Cheshire collimator, for aligning Newtonian telescopes. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

136 saves Source: Thingiverse Updated 2026-10-23 License: CC0 · commercial OK 6 makes Category: Education & Science

Tags: alignment, astronomy, astronomy telescope, cap, cheshire collimator, collimation, collimation cap, Collimator, telescope, telescope accessory, telescope collimator

About this model

A simple Cheshire collimator, for aligning Newtonian telescopes. Comes in 0.965", 1.25", and 2.0" eyepiece sizes. You can choose whether to print with or without an internal crosshair. Also check out other telescope stuff. Printing Ideally, the eyepiece is printed in black, with the white label glued on. This should maximize the contrast between the eyepiece and label. However, if you don't want to use the label or you just don't have black, any color works fine. I did mine in bright red. Print the attached PDF at 100% scale, and cut out the crosshair or blank for your eyepiece size. Be sure to cut out the hole in the middle, too! Then glue it to the inside diagonal of the eyepiece. This gives you a handy reflection while collimating! How to Use For information on how to use this, see this…

Frequently asked questions

Is this 3D model free to download?: Yes. Cheshire Collimator (0.965", 1.25", 2.0") is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by agrif.
Who made this model?: Designed by agrif, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.