Apr 12, 2020 · The Sony NEX-7 features the highest resolution APS-C sensor in the NEX line, with a total of 24.3 MP. This particular sensor was also used on the Sony A77 SLT camera, which we reviewed and liked. With a whopping 24.3 Megapixels of resolution, the pixel density of the NEX-7 is very high, with a pixel size of just 3.89 microns.. In a nutshell Sony has designed the NEX7 to be “extraordinary” in Sony’s own words. It has a 24 Megapixel EXMOR sensor, which is the same one used in the high-end Alpha a77 DSLR..