The A99 features a 24.3 megapixel full-frame Exmor CMOS image sensor and BIONZ image processor to produce high resolution, well-detailed still imagery and full HD 1080i/p video recording with notable low-light sensitivity and clarity. Sony's Translucent Mirror Technology is utilized within the camera to provide continuous auto focusing capabilities as well as quick shooting performance, including the ability to shoot up to 10fps when working in Tele-Zoom High Speed Shooting mode. The autofocus system utilizes both a 19-point, including 11 cross-type sensors, contrast-detection method as well as a 102-point phase-detection sensor to provide quick and accurate focusing in a wide array of shooting scenarios. Live view monitoring, image playback, and menu navigation can be done on either the XGA OLED Tru-Finder 2,359k-dot EVF or the 3.0" 1,228k-dot LCD monitor, which features a three-way tilting design to promote easier viewing from high and low angles.
The included 28-75mm f/2.8 lens' constant bright maximum aperture aids in photographing in low-light conditions and for controlling depth of field and selective focus applications. A Smooth Autofocus Motor provides fluid and accurate focusing performance and the integration of three extra-low dispersion and four aspherical elements helps to render imagery with minimal chromatic aberration and higher overall sharpness.