The sony alpha a99 digital slt camera sits at the top of the sony range with its 243 megapixel 35mm full frame cmos sensor dual af system and pro style video features the sony alpha a99 is the successor to the flagship a900 dslr and the first to include the revolutionary slt single lens translucent technology into a full frame body the bionz image processor combined with the slt technology work together to drive the worlds first dual af system with 19 sensors including 11 cross sensors