Originally posted by UncleVanya The sensor is 2.25 times larger in area. 1.5x wider diagonally. The ratio is 3:2 just like APSC. (Math after this is not fully checked but I think it is accurate) So if you crop 16:9 on a K-3 you get an image roughly 6016x3384 vs. 7360x4140 on the K-1. The K-3 makes a 20mp crop at 16:9, the K-1 gives a 30mp crop. So you get about 1.5x the total pixels even with the change in pixel density and the cropping for 16:9. This assumes you have a lens with a similar field of view to use on FF as you do on Crop.
Thanks for the explanation- sorry for the confusing foolishness.
Shows how ignorant I am when it comes to FF format gear- I don't pay a whole lot of attention to the things I don't use. For some reason I was thinking the micro 4:3 format had come out of shrinking the full frame sensor and the C was not cropping the equilateral ratio, basic stuff, yes, but as mentioned, I was a young teen last time I shot a 35mm camera and until going to DSLRs a decade ago, the Digitals I owned were mostly fixed Fuji 4/3. I loved the 110mm when I was kid, but that's another bag altogether...