Originally posted by Byrd-2020 Your experience is greatly different than mine (and that of many others on this site). What you say also appears to contradict Falk Lumo's report on the low light/front focus issue.
There are any number of people who have said they aren't having a problem since v1.03. Rupert below, Brooke, check the old threads on dpreview. Falk has test results, i don't so there is no conflict. Checking 2 photos from the last play, they were at ev2 and ev4 as much as i can calculate, and were reasonably sharp at 100%crop. But the one at ev2 had some high contrast edges which makes focusing easier, and i don't shoot below a minimum of f4, more like f5.6 or smaller. So i've learned with my k20 not to shoot in a way that tests the AF function, and i've carried those practices onto the K5. The play pictures that my friends and I now display in the theatre lobby are noticeably sharper than they used to be. One friend has a K5 like mine, and the other two shooters have D7000's. So far, i haven't noticed any sig. difference between the files shot from the 2 makes of cameras, and i processed all the photos from the last play.
Falk probably said that the K5 doesn't meet the -1ev of the specification. I didn't test the K5 at that spec so there probably is no conflict. The quiet shutter for theatre work, the much better high iso images (with noise that is more easily cleaned by LR), its so far ahead of the K20 that the fact that it may not meet its original spec is of no real world concern for me. When i do night exposures on a tripod (non-theatre stuff), i just use a flashlight or the onboard focus assist light, and reach a focus that way.
Originally posted by Byrd-2020 Why would the front focus issue be present in only some K-5s? Are you suggesting that this is a 'quality control' issue and not a design problem?
I'm not suggesting anything, i'm just telling you this camera is so far ahead of my K20 results, that i'm delighted to have it. I didn't buy a camera to test, i bought it to do theatre work with and it excels at that.