Compatible with Canon EF Mount Module for 3D Printing

Design preview. Rendered from the file, not a photo.

The maker says it fits: Canon EF. See the proof

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What it does

Bayonet mount design seats snugly on Canon cameras so you can build custom adapters without wobbling.
Works for microscope adapters, macro lenses, and pinhole cameras so you can create the camera setup you need.
Tested and proven to print well so your finished part fits right the first time.
Light tight seal keeps unwanted light out so your images stay clean.

Build your own camera gear. This EF mount module lets you attach custom lenses and adapters to Canon cameras. You get a detailed bayonet mount that works just like the real thing, without the real thing's price tag.

The mount has been printed and tested many times. It seats snugly and securely on Canon bodies. The design includes all the threads and angles you need for a tight fit. This mount works great for microscope adapters, macro setups, pinhole cameras, and telescope adapters.

Print quality matters with this design because of the thread overhangs. Good print settings give you a perfect fit. Even okay settings work if you do a little cleanup. The mount seals light tight and holds steady once it is seated.

Not affiliated with, endorsed by, or sponsored by Canon. Canon and its product names are trademarks of their respective owners.

3.7k 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: Canon EF

That is the maker's word, not a fit we measured. Check the size below against your own.

Canon EFFrom the maker's own listing notes, 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 We have not load tested this design, so we do not publish a weight rating.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.