The L-mount, unfortunately, is not an open mount, but a proprietary mount shared by Leica, Panasonic and Sigma, with no open specification.

This is a rather superficial review. The camera has a whole number of known issues:
- CinemaDNG files are incompatible to Davinci Resolve (can only imported as separate image sequences and audio tracks);
- CinemaDNG is recorded from a 6K Bayer sensor matrix as a 4K pseudo-Bayer sensor matrix using line skipping and creating all kinds of line skipping artefacts; only 4K APS-C crop gives a clean image;
- CinemaDNG is difficult to expose/clips early since it's internally mapped into Rec709 color space, no RAW histogram;
- No 12bit CinemaDNG at 25p and 29.97p, no 24p (only 23.98p) and no DCI 4K (only UltraHD);
- Full linearisation curves missing in 10bit and 12bit RAW, as opposed to (strangely enough) 8bit RAW, thus artificially cropping the camera's dynamic range. Dynamic range is therefore poor in comparison to other cameras (Blackmagic, Panasonic SH1).
- Audio level adjustment is deeply buried in submenus and only goes to -36db (too little in loud environments with hot microphones)
- Bugs with unsteady black levels in certain ISOs (400-2000, 4000) and one-stop underexposes when shooting stills in Manual mode
- no zebras and focus peaking at the same time
- no focus magnification while recording video
- 1/10s shutter delay when shooting stills, recorded image is not the same as image displayed after pressing shutter; this and sub-par AF make the fp unsuitable for documentary/street photography
- no DOF preview when shooting stills
- Rolling shutter and banding (under energy-saving light) because of the electronic shutter in stills, no mechanical shutter
- exposure compensation buried in submenus when shooting in M mode + Auto-ISO

Terrible audio in this video. The guy shouldn't have talked directly into the mic, but used a pop screen. And his audio clean-up is so exaggerated that the result sounds unnatural.