Thanks to an evolutionary leap in image processing power and efficiency, the Alpha 7R Iv combines world's first high-resolution 61MP back-illuminated Exmor R Cmos image sensor with impressive shooting speeds at up to 10 fps with full Af/Ae tracking, as well as beautiful 4K Hdr video, wide 15-stop dynamic range and high sensitivity with area specific noise reduction.World's first 61MP pixels full-frame sensorThe Alpha 7R Iv features the world's first 35mm full-frame back-illuminated Cmos image sensor with 61MP effective pixels, delivering depth and dimension that was once only available in medium-format cameras. The back-illuminated structure and effective area specific noise reduction techniques combine to deliver an extraordinary blend of low noise and high sensitivity for enormous imaging potential.