hello, gentle pentaxians
. i need some help from you lba infected people.
to be honest from the start, it is a gx10, but i guess that shouldn't make much difference
i finally got the lens i have been dreaming of for a decade or so, since i shoot slrs: 80mm/1.8, well, actually better, i got the smc-m 50mm/1.4, which is 75mm/1.4 on the aps-c, so the same fov, and a maximum aperture i wasn't even dreaming of back then. needless to say i am in love. however there seems to be an issue: metering seems to be quite erratic: every now and then i get completely off-the mark readings, usually overexposing, but not only (using the green button for stop down metering). it seems to happen both with center weighted and spot metering, btw, and when it happens, it does it even if i try it repeatedly (so it's not a glitch, like the aperture not closing fully -- though that should give underexposure). underexposure happens also, but not as often (need to do more tests, though). mettering with the two da "kit" lenses has always been spot on (or as close to always as one would expect), same goes for an old "A" zoom ("exakta varioplan 35-70").
anybody experienced this? may it be i'm overlooking something obvious?
thank you all in advance.