Edit: I was reading posts in reverse chronological order and didn’t see that RickO diagnosed and reproduced the problem with a magnet. The issue is that some units were evidently shipped with an incorrect magnet that was so powerful it affected the IR-cut filters operation. When the camera changes from daylight to IR night mode, a filter is moved with an electromagnet. That movement is what makes the “click” when the camera changes modes. The purple tint had nothing to do with Hall effect. The following is RickO’s post about reproducing the problem.
I was envisioning something much more subtle.
@MoOse said it was a wrong magnet problem. Perhaps travy_trav had the extra strong magnet in his camera too. If so perhaps that is why he didn’t lose his camera while driving with it on the roof.
------- original redundant post --------
Can you confirm that by “opening” you mean pulling the base with the magnet in it away from the white camera body?
Does the purple tint affect the whole image, or just part?
If extending the base makes a difference, then it sounds like the image is being affected by the magnetic field, which sounds strange. I haven’t heard of the “hall effect” affecting image sensors, but I guess it is possible. But I can’t think of anything else that extending the base would affect.
Any possibility of posting pictures taken with base closed, and base extended with the “Take Photo” function of the app so we can see what you are seeing? Ideally with the only difference being that the base was extended, i.e. same lighting, “subject” etc. If you have a white board that would make the tint easier to notice in the photos. Or tape a sheet of white copier paper to something in front of the camera. Try to keep everything else constant, so the differences are more likely to be due to the magnetic field. Also, to minimize the affect of camera position, turn the camera upside down, so the “iris” stays in a fixed location during the experiment. First push base down onto camera body and take photo. Then pull the base up and away from the camera body and take another photo.