I finally got around to unpacking some boxes after my move (almost 4 yrs ago but that's a story for another day
) and lo and behold were Pentax primes from the 80's when I had my ME Super & Mx.
I have the 135/3.5, the 28/2.8 and the 50/1.7. Having read my K-50 will take any Pentax lens ever made I mounted the 135mm first. It didn't matter what setting I chose on the PASM dial, the camera reported it was in the aperture priority mode, except when in Bulb and Manual. Anyhow, the display never showed me the aperture and the exposure didn't appear correct. It didn't matter what setting my aperture ring was set to.
What am I missing here? If I can't get any more functionality from my old lenses this Pentax system is no more convenient than using old Pentax lenses on my m43 bodies with dumb adapters.
I'm sorry if this is such an obvious noob issue, especially if it's been covered many times before.