Here we are comparing two cameras with different body types: Pentax K-1, which was introduced in February 2016 is a Semi-Pro DSLR camera with a 36.0MP Full frame sensor whereas Panasonic S1R, which was introduced in February 2019 is a Pro Mirrorless camera with a 47.0MP Full frame sensor.
Despite some fundamental differences of these two body types, Mirrorless cameras are becoming serious alternatives to DSLR cameras thanks to their size/weight advantages and recent improvements in their focus speeds , which makes this comparison even more interesting. Fortunately, you can't go wrong with any of these cameras as we rank them amongst Top 10 cameras in their classes. Pentax K-1 is ranked #3
out of 90 Semi-Pro DSLR cameras with an overall score of 90 whereas Panasonic S1R is ranked #3
out of 38 Pro Mirrorless cameras with an overall score of 96.
Let's have a brief look at the main features of Pentax K-1 and Panasonic S1R before getting into our more detailed comparison.