How to change focus on 120 Degree Ultra Wide Angle CS-Mount Lens?

Hi all,

I recently started using the 120 Degree Wide Angle lens (Arducam CS Lens for Raspberry Pi HQ Camera, 120 Degree Ultra Wide Angle CS-Mount Lens, 3.2mm Focal Length with Manual Focus) with the RPi High Quality Camera.

I don’t understand how I can change the focus distance.

Can someone please help me?

Thanks in advance!

Did you ever figure this out? I just bought this lens and no matter how much I turn the outer focus ring, the image is completely blurry / pixelated. There is the knob that unscrews on the inner ring’s side, but I’m not sure what this does. I can’t find any user manual either.

Well, I found a solution, no clue if it’s the correct one. You should try to unscrewing the whole lens while watching the live feed. At some point you will get a clear image. To be able to firmly screw the lens into the camera at the right distance, I 3D printed a small ring that I inserted between the camera and the lens.

Here is picture of the ring. It has a thickness of 27mm IIRC.