I generally use multi-segmented metering. But, I don't consider the lens to have a metering problem. I suspect it has more to do with the composition of the scene more than anything else. I did just notice that I didn't input the correct focal length on the first blossom photo- not sure if that would cause metering issues or not. Anyhow, needing to apply some ev comp (+/-) once in a while has always been par for the course with me regardless of camera or lens. Maybe I'm the one that is screwed up.
Here is a scene that has all sorts of exposure issues, but I suspect it has more to do with the black dog and bright window. Pick your poison- expose for the dog, or expose for the window. Parts of the dog are underexposed and the window is blown out. I applied no ev comp. I fault the scene not the camera or lens. Same Pentax A 50mm 1.4 lens
Crop it a bit, and it's not so bad. Kind of makes me want to look out that window to see what he's lookin' at!