Focal Length converted... I want actual...

I'm not entirely sure when this happened, but at some point Photos started displaying the lens focal length in "35mm equivalent" instead of the actual focal length. I think it happened with the High Sierra update (I'm currently using 12.2.1).

If I use my iPhone, for example, it now displays 28mm instead of the actual focal length.

If I use my 50mm lens on a camera with a "full frame" sensor, it shows it as 50mm, but if I put it on a camera with an APS-C sensor (or in APS-C mode on the full frame camera), it shows 75mm.

I understand why this happened, but how do I turn it back to displaying actual focal length values?

I don't really care what the focal length of my phone displays as, but I swap lenses back and forth among cameras with different sensor sizes, and I'd like to know the real numbers, not the "equivalent"...