I've had the Mark II since the end of August, and am forming some impressions of how it works and it's benefits. I shoot wildlife, and low light is a constant.
Ignore internet quick impressions. They are ridiculous and worth ignoring, and will likely misinform.
When you get a new camera body rework your post processing. This is why first impressions are useless; your presets and styles that you lovingly massaged for a previous body require the same care and attention for the new one.
My rants out of the way.
The ISO range on my K1 was set to 100-6400. The quality of 3200 iso shots were amazing, and I found that in certain conditions, ie. light colors in low light it was better to shoot iso 6400 1/1000 than iso 1600 1/250. I would get more detail with the higher iso sans movement blur. That was a revelation, my experience up to then was to lower the iso.
The initial setting started with 100-12800 on the Mark II then 51200 as I saw how good the high ISO shots were. The top end gets pretty bad except in unusual conditions. The extreme high ISO shots don't have fine detail but are workable in some cases.
The mid ISO shots are cleaned up nicely. I haven't seen problems with loss of detail, these are out of usable range with the K1, so anything i get is a bonus. The higher, 20,000 and up are noisy, and the processing doesn't smooth out the noise aggressively, but seems to bring out whole photo contrast and color. Zooming in there isn't much there, but zoomed out to full resolution gives a reasonable image. Some images had a definite application of contrast curves that brought the subject forward. This, remember, in low light conditions where the subject is hard to see.
I have also seen the whole thing falling off the edge, returning a muddy mess. Low light dark colors don't work. And oddly, often the image on the camera screen is worse than the raw file.
I'm very pleased. I am getting shots that i couldn't get with the K1, and definitely not with the K3. It is more than good post processing.
I'll post some examples when i get to my laptop.
Last edited by derekkite; 10-21-2018 at 09:52 AM.