Last year Sony showed a prototype hybrid stills / 4K video DSLR along with a modular-looking 4K cinema camera. Now a few more clues have come around. SonyAlphaRumors reports are saying the 4K DSLR will have an interchangeable lens mount for E-mount, A-mount and PL-mount. And yesterday US cinema gear rental / sales shop AbelCine teased the shot above, which may or may not be related – only confirming it’s from Sony. So what…