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Converting a Raspberry Pi camera to M12 thread

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Andreas Kahler edited this page Jul 29, 2022 · 5 revisions

This guide shows how to convert a Raspberry Pi camera to M12 thread (a.k.a. S-mount) using a 3d printed fixture

Items needed:

For all steps: be careful! Do not damage the sensor, the cable or the connectors!

Follow this guide at your own risk! This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE.

First unplug the camera connector using a screw driver or your fingernails.

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Then carefully lift off the camera module and remove the glue under it (we need to replace it, as we need to make sure the sensor sits flat on the PCB)

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Now we remove the lens. We replace it with a M12 threaded lens, so we do not need it any more. I'd suggest to keep it anyway, so be careful and do not scratch it. The lens can to screwed out by rotating it anti-clockwise. The Pi cam comes with a white "wheel" tool that lets you do that easily:

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You can also use a set of pliers to do that if you do not have the tool. If you have problems, you can also try a 3d printed tool: https://www.thingiverse.com/thing:4774511

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The camera sensor is now unprotected! Make sure you do not touch or even damage the sensor in the following steps!

Then add the new piece of double-side sticky tape on the PCB. It should be the size of the white square on the PCB or little bit smaller (not larger!)

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Now we put the sensor back on the PCB. Our suggested way to do this:

  • plug in the connector again (this will assure correct alignment)
  • remove protective film from sticky tape
  • press sensor onto sticky tape. Make sure the connector facing side makes contact with the sticky tape first, then the opposing side! This way it is ensured the cable is not stretched.
  • press down the sensor enclosure firmly

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Finally, put the 3d printed lens holder over the sensor. There is a cutout for the cable, defining the orientation. The alignment is done by two M2 screws. For use in StereoNinja, the screws go into the camera holder. We suggest to attach it there immediately, as the lens holder also protects the sensor. For the same reason also screw in a M12 lens at all time.

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