I don't know if this helps anyone in the decision making about the K5.
I have had mine for about 3 months now and am extremely happy with the camera.
I am not setting out to extend into greatly exaggerated perameters purely find a fault somewhere.
I take the photos I want from macro to tele, in what light is available at any given time, and have had no problems at all.
In fact, I am very, very pleased with low light performance up to this time.
2 shots taken, without use of flash, for sample purposes:
K5/DA35mm :1/45sec/F2.8/iso6400. Extremely poor light. Focus on the word "Inside".
K5/Pentax M 50mm 1.4. : F4/1/20sec/iso3200
This is posted purely for information. I am not out to prove/disprove anybody's point.
A lot has been said for and against this camera for a long time now, and I have got to the point where I don't follow much of it anymore. I just take photos, and if something comes up that shows a problem then I will followup on it.
K5.....for me ..its great