Sony has officially announced the rumored full-frame A850 and mid-range A550 and A500 DSLR additions to its Alpha family. The A850 offers a few less features than the A900 but keeps the same 24.6 megapixel sensor and knocks the price tag down to around $2,000 for the body. The new A550 and A500 offer 14.2 and 12.3 megapixel sensors, respectively and offer tilt-able LCDs as well as fast burst shooting speeds. Read on for additional details as we take a closer look at what each of these new models has to offer.