When it comes to resolving power, the A99 delivers a lot, but you might expect it to do even better with its 24.3MP Exmor CMOS sensor. At ISO 50, it served up 2825 lines per picture height. Sony’s last full-frame DSLR, the A900, yielded 3230 lines with its 24.6MP sensor. As the sensitivity increases, though, the A99 does a good job of retaining resolution. At ISO 1600, it achieved 2650 lines. At ISO 6400, the A99 held onto Excellent-level resolution with 2525 lines. At that same sensitivity level, the 5D Mark III outstrips the Sony with 2660 lines, while the Nikon D800, with its much higher-megapixel sensor (36.3MP) schools them both with 2900. At the A99’s top sensitivity of ISO 25,600, it beats the Canon with 2340 lines to the 5D Mark III’s 2150, while the D800 holds the lead with 2470.