Cross posted from another K-3 thread….
distinct line width down to 3000 lw/ph, extinction not until close to 4000. The K5IIs was line distinct lines to 2300 lw/ph. That would be a 30% increase in resolution. Based on a 50% increase in file size, that's simply awesome. You can only get about 25% better with a D800.
If trying to determine where extinction occurs doesn't give you a headache, I'm not sure what will. But it's well over 3000 lw/ph, I'd give it more than 31 but less than 32.
I like to have 100 lw/ph vertical depth per inch when printing… this should give you a nice 30x40 print.