The world’s first full-frame stacked CMOS sensor gives the A9 truly staggering readout speeds. Combined with the latest advancements in pixel-expansion and microlenses, this sensor allows the A9 to deliver both speed and quality with unrivalled performance. To complement the new Exmor RS sensor, the A9 is equipped with the new front-end LSI chip, allowing the camera to capture a mind-blowing 20 frames per second, while maintaining continuous autofocus and uninterrupted viewfinder display, providing a complete solution for demanding sports photographers. The A9 is designed to withstand the rigors of professional use, with a full magnesium alloy chassis and extensive dust and moisture sealing. From the ground up, the A9 has been designed as a workhorse tool for everyday use. You can’t just have a do-over for the perfect moment- that’s why the A9 includes dual SD card slots, so you can capture redundantly for instant backup and peace of mind. Additionally, for speed-critical capture, one slot supports the ultra-fast UHS-3 standard for rapid buffer clearing. Rate of capture doesn’t count for much if your images aren’t sharp, which is why the A9 is the first full-frame E-Mount camera to bear the 4D Focus badge. Gathering focus information from 693 on-sensor Phase Detect autofocus points, the A9 is capable of tracking even fast moving subjects with incredible accuracy across the entire image frame.