Originally posted by NaClH2O The K10D and the K20D have a bad time metering with the older manual lenses. I did a search both here and the Rumors forum for info and came up blank. Has this issue been fixed with the K-7?
NaCl(enquiring minds want to know)H2O
After reading this thread I'm somewhat surprised. I've never had the slightest trouble with green-button metering on Pentax-M lenses with my K20D. I had (recently sold out all my old glass and bought new stuff) the M 50 1.4, the M 100 f4 Macro, the M 135 f2.5, and I have a Tamron 180 f2.5 with a P/K-M mount on it, and they all expose flawlessly - that is to say, very similar to my Pentax FA and DA lenses.
I'm surprised because this would (should!) be the absolute easiest way to meter accurately, as you're measuring actual incident light, not predicting the amount of light that WILL be available. I would have been quite upset to discover that it metered inconsistently with those lenses. Consistent behavior I can compensate for - inconsistent behavior makes that impossible!