Bought K-5 about 2 months ago. It suffered from front focus issue in low light. Got it repaired and while the low light issue was solved, it now back focused under normal light - to a degree that too many pics were unusable.
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2012.06.12 - Zafar Iqbal's Photos | SmugMug - primarily pics taken by my K-5 after I got it back from repairs)
Tried a demo model at the shop. Same issue. They opened a brand new K-5 box. Same issue. They were willing to make a swap if had been satisfactory, but it wasn't, so my cam went back in for repairs. The shop was kind enough to find a K-r I could use. AF issues again. Huge misses in overcast type lighting. It seems to miss the focus in both normal and low light.
Can't find much about normal/bright light focusing issues. So it's either something new, or I'm expecting too much? If I'm expecting too much then the (Pentax) Phase Detection AF is utter crap.
Been a very happy owner of the K-x. Sure, it misses focus now and then but mostly in extreme cases - super brights or very dark subjects/light - or stuff that confuses the AF such as tons of branches in front of a face or whatever - it's also clear the CDAF gives up quicker than PDAF - but it's way more reliable! I don't expect any cam to work perfectly under those circumstances, but the K-5 and K-r are a complete joke. The K-r is much better, but random. When I think it should nail the focus it doesn't. When I don't think it will focus properly, it does.. it's very. Can't compensate enough with with Micro Adjustment.
Tried with 3 lenses:
Pentax 70mm Limited
Tamron 90mm Macro
Sigma 70-200mm APO
All at widest aperture.
Hate to say this, but when I get my K-5 back and it shows still has unacceptable issues, I'll ask for my money back and look for some other brand :/
Last edited by Zafar Iqbal; 10-29-2013 at 02:02 PM.