Just Posted: Our hands-on Sony SLT-A99 preview article and video. The A99 is the company's flagship full-frame interchangeable lens camera, offering a 24MP CMOS sensor with on-sensor phase-detection autofocus. This combines with the dedicated conventional phase-detection sensor to offer a series of never-before-seen features. We look at these and several of the A99's other key stills and movie shooting capabilities in our hands-on preview.