The big advantage shooting 4k on DSLR's is much improved aliasing and moire due to the higher spatial frequency. Scale to 1080p reduces noise a bit too.
But I still prefer uncompressed 2k raw over any form of compressed 4k H.264. Shooting FF for shallow DOF, 4k resolution is completely irrelevant. You aren't even seeing 2k if you miss focus by a pixel width.
But I still prefer uncompressed 2k raw over any form of compressed 4k H.264. Shooting FF for shallow DOF, 4k resolution is completely irrelevant. You aren't even seeing 2k if you miss focus by a pixel width.