By putting a 24 megapixel full-frame sensor into a body nearly the same size as the Olympus E-M1, the Alpha 7 is arguably the most ambitious camera Sony has ever made. Never before has there been a full-frame camera this small - and one that supports nearly every 35mm lens format ever made, along with Sony's own E-mount lenses. Does Sony get enough things right with the Alpha 7 to compete with more conventional full-frame cameras such as the Canon 6D and Nikon D610? Find out.