Originally posted by Igor Sotelo
I have both the K-1 II and the D850, which one is better depends a lot of what you need the most. Also on available lenses. One couldn’t say straight, one is better than other.
That is very interesting, and you have a rare circumstance! As to the Nikon mirrorless, it is also interesting that their top models share the same sensor with the D850, which means the D850's technology is holding up well.
Of course, between it and the Pentax K-1 II there will be something positive for each, no doubt. And of course, I chose the K-1 II because I happen to already have a long history of Pentax use, and some very good FF glass. However, there are features of each that can be of interest to anyone coming from not being already immersed in a brand.
A couple of features from Pentax stand out for me, one being not having the AA filter, BUT having a built-in alternative functioning filter-substitute to deal with moire on the spot should it come up. Another being the Pentax Hyper System, as when shooting in the P mode, one can instantly take control to substitute a different shutter speed or aperture by using the front or rear dials for Hyper Program-, instantly switching to Av or Tv operation without having to change the mode dial before choosing one's preference. A touch of the green button instantly restores full P mode operation. Then when in the M mode, one can use the green button to instantly set meter-centered exposure- Hyper Manual. Not happy with the aperture or shutter speed? First hit the AE-L button to preserve the exposure value, then make your selection, and the other will follow along to keep that exposure value. Using this Hyper Manual system is a very fast and efficient way, for instance, to take spot-meter readings around a scene.
There are a number of others also. Such useful, unique features, along with reasonable pricing, for my purposes are good selling points for continuing with Pentax, or for others interested in a fine DSLR.
The Nikon D850's sensor will most likely be the basis for the next Pentax K-1 III. Imitation is the highest form of flattery. The Nikon D850 is widely recognized for excellence.