Tamron 90mm f2.5 with PKA overexposing

have just acquired a tamron 90 f2.5 macro lens , using the pka adaptor on my k200 it seems to be over exposing , has anyone else had this problem ? should i try centre weighted meteriing ? any help appreciated , tim.

If there is a consistent over-exposure, then applying some exposure compensation will do the trick.

I have this lens. I had the over exposure once. I did not have both adapter tabs in their notches. After redoing it, the lens has been super.

I have The f2.5 and f2.8 Adaptall 2 macro lenses along with some others and they all overexpose. I just dial in -1 when using them and that normally sorts it.