A RP is 3,888 x 2,592 pixels in crop mode, which is 10.08 megapixels. Slightly smaller than the 10.1 megapixels of my 40D. I could use my EF-S 10-22mm f/3.5-4.5, with the EF-RF adapter, on a FF RP. But I preffer a crop camera. If Canon made an RP-Crop, I'd be first in line to order one. If not...