24.6 megapixel 'Exmor' CMOS No surprises here (Sony announced its blockbuster full frame sensor back in January). As well as offering currently the highest resolution in its class the new sensor is claimed to offer class-leading noise performance (it may have more than twice as many pixels as the Alpha 700, but the pixel pitch is actually larger; 5.9 micron vs 5.5 micron).