Originally posted by reh321
My K-30 started having issues when it was almost exactly three years old, but I had been running it on the AA-adapter available for K-30 and K-50 bodies, which seems to prolong the life of those, so timing sounds about right to me. If your camera is beginning to develop aperture control issues, it will happen gradually - initially the first photo each day, then two, etc. The best way to postpone permanent and total issues seems to be to use the aperture control every day, so I doubt very much that "using it alot more" will speed up the problem - in fact, that is more likely to delay the problem. If you read photos {dark frame followed by normal exposure} into editing software, such as PhotoShop or gimp, the dark frame should have the histogram squeezed into the left end {but still a curve} while the normal exposure histogram should look totally normal indeed.
Yeah, I think the problem isn't that I'm using it a lot more, but rather that it sat for 6 months without use until recently.
Yesterday I was able to replicate it twice, but this morning on a different lens it didn't happen. I'll keep a close eye on it (and will check the histograms as you suggest).
If it keeps up on multiple lenses, I may opt to fix before it gets worse. Intermittent issues like this would drive me nuts, even if they're not really an impediment to practical shooting. I'm pretty handy with a soldering iron, so the fix doesn't look too arduous.