To distinguish itself from other starter DSLRs, the 16-megapixel a57 has two tricks. The first is hardware-based – a dedicated autofocus sensor that provides full autofocus during both still and video shooting. The other, called Auto Portrait Framing, is software-based. It automatically crops the picture using the "rule of thirds," meaning it sticks the subject off-center and trims accordingly. It's a gimmicky but ingenious crash course in shot composition. [$700;]