Originally posted by CP1 I don't think you can compare the K1 (or K1mk2) to the D810 anymore since Nikon has replaced it with a D850. The upside I've gathered thus far is going with Pentax means a cheaper price-point to jumping in compared to Nikon. Will the Pentax K1mk2 with PS compare favorably to the D850's 45mp sensor? not likely, although it would be close. Also, the lens issue. A lot of people here have the "well it's good enough" attitude but I find that hard to live with especially in a time when third party lens makers are putting out the best glass they've ever made at very reasonable prices. Sigma has the 35mm art lens in K mount still, but not a single other piece of their entire ART series has it which is sad. By no means am I saying the K1mk2 is a bad system but it is starting to show it's age and without stellar modern glass to put in front of it, how long will the Pentax community stand for it? It's been pointed out by Tony Northrup while testing the Sony A7RIII's pixel shift feature that only the sharpest glass will produce the best results, I'm really surprised Pentax hasn't pushed for high resolution glass. Even Rokinon/Samyang has "SP" glass said to be able to resolve 50mp for the 5DR. With all of this said, I was considering the K1mk2 but if you really buy into a system for the glass and not the body...whats the draw here?
Has the D810 been replaced or are they still selling both?
As far as I can tell, the D810 is still available on B and H and Amazon for 2800 dollars -- roughly 800 dollars more than the K-1 II (with the K1 II including a free grip). The D850 is a different animal -- one that trades high iso capability for faster frame rates and 4K video. I believe that is why Nikon has the D810 still available. They know that there are still plenty of landscape photographers who want the still image quality you get from a D810 and don't need the frame rates or video performance of the D850. As far as the comment about "only that sharpest glass producing the best results," that has nothing to do with pixel shift and shows that Tony Northup has a poor understanding of Pixel Shift. Pixel shift is not about sharpness, it is about increasing color depth and dynamic range and decreasing noise to give the best single image possible. Older lenses benefit just as much as more modern lenses and current Pentax lenses work quite well.
This is the DFA 24-70 with pixel shift...
The image is quite sharp, even at full size, but the benefit to me from the pixel shift is the rich colors I was able to get from the K-1.
As far as current glass that I recommend for the K-1 or K-1 II, the FA limiteds, DFA 15-30/24-70/70-200/150-450, DFA 100 macro WR, DA *200 and DA *300 should be a start, with every lens offering good performance and image quality.