The megapixel race is still on and this time Sony is leading the pack with its new full-frame mirrorless offering. The company has just released its fourth iteration of the A7R camera and the specs look impressive. The new Sony A7R IV features a super high-resolution 61 MP full-frame BSI CMOS sensor, 4K video shooting (full sensor 6K to 4K resampling), Real-time Eye AF for video, built-in AF converter for audio, refined ergonomics and improved weather sealing. All this will come at an MSRP of $3,500, with the availability date of September, 2019.