+1 with JohnBee
I can only speak of the K-7 and low-light conditions. I do not have the K-5 and cannot comment on it. Also I do not care about high ISO; I want simply to do some real shooting in low light conditions.
I achieve excellent low-light performances with my K-7 using either of the two techniques:
- with some in-camera PP, it is possible to get very nice shots either with in-camera PP (see
K-7 High ISO Success!)
- with some dedicated noise reduction software (Noiseware in my case).
The first one requires no PP nor any software. You simply the camera on-board High-ISO noise reduction and it works fine. I tends to prefer the second technique: that is, you do no noise-reduction in-camera and you perfom NR afterwards in your computer.
The third method to deal with low-light conditions is a fast prime lens (eg f1.4). In very dark conditions, this is the best technique using MF.
Hope that the comment will help....