@kellar42 Thanks for the info. But...

You can losslessly compress DNG RAW files using Slimraw on a computer and reduce the file sizes to 40% of the originals (a reduction of 60%). If you are willing to go "virtually" lossless then you can reduce to 25%, just like you can do for ProResRAW. So, if the lossless ProResRAW files are 40% the size of lossless DNG RAW files, there is no size advantage to ProResRAW at all at all. And as computers get faster and programmers get more sophisticated, in the future the compression - without loss - may be greater.

One can use a Ninja V on the Sigma fp, just like on the Panasonic S1H, to get ProResRAW. I own it, so I can do it - I have no bias based on the fact that it is the only option for RAW, like it is for the Panasonic cameras. To get any RAW from the EV1 or the S1H you MUST use the Ninja V.

The question still remains whether there is any advantage to shoot ProResRAW (or BRAW) when one can shoot internally 12bit DNG RAW on the Sigma fp and compress them to 40% (or less) of the original size in post.

Cheers, looks fun, and yeah, if I had CDNG internal maybe I'd use it...

You can still shoot with the BM Video Assist 12G and the Sigma fp, it is just awkward. Punching the record "button" on the VA screen hurts stability. The VA 12G with batteries is bigger and heavier than the Sigma fp with most lenses. I mounted the camera on the VA. It works...

4K DCI 24P BRAW, Q0 (the highest quality) shot on an SD card in the VA:

Meanwhile, I do not see the point of externally recording 12bit BRAW or 12bit ProResRaw on a camera that can record true 12bit RAW (DNG RAW) internally. So, I looked to see if there was one (BRAW vs. DNG RAW):

The BM Video Assist 12G was used to record BRAW from the Sigma fp via HDMI. The highest quality setting for BRAW was used (constant quality).

DNG RAW was recorded to an SSD attached by USB-C cable to the Sigma fp.

ISO 3200 (native), F8.0, Auto WB, for all clips.

Canon EF 35mm F2.0 and EF 100mm F2.8 Macro in Full Frame and Crop Mode.

In Resolve, the input gamma and gamut was set to BlackMagic Film Generation 4 for both.

@calmist Or are you seeing more sharpening? How could there possibly be more real detail? There is chatter on the internet that BRAW sharpens and noise reduces. And, besides, I see the opposite (but the difference is so small it is hardly worth anything and may be in my head) as have some other commenters.

New firmware for Video Assist 5” 12G HDR and Video Assist 7” 12G HDR specifically (and only) for Sigma fp features and improvements:

Added support for 100 and 119.88fps on Sigma fp for Blackmagic RAW. Improved color temperature in Blackmagic RAW on Sigma fp (maybe this gets rid of the green tint). Fix trigger recording when outputting Blackmagic RAW on Sigma fp

Also needs Sigma fp firmware update to 2.01.

@Faudel Thank you for looking, closely.

First, I see what you see.

Second, lost detail cannot be brought back. So that is a real issue for BRAW.

Third, highlight "rolloff" is a property of the de-mosaicing, which is all done in DaVinci Resolve for DNG RAW. BRAW is partially de-mosaiced by the BM VA as you say and then fully processed by DaVinci Resolve. Resolve was set to process both files with the same transform, and I could see that highs were rolled off in BRAW without any further changes. So, the greater whites for DNG RAW is all me and the software, since I could use the controls in Resolve to muck around with highlights for both. In principle, anything the BM VA does to the RAW stream, Resolve can do also, maybe better. So, I could have rolled off the whites, but as you see, the whites are not over the top.

I do not see how partially de-mosaicing or any de-mosaicing can reduce moire, which is due to the lack of an optical low-pass filter in the camera and perhaps line skipping to go from 6K to 4K. In principle, there might be a software fix of some kind, but I doubt that is part of the BRAW de-Bayering since many cameras do have the filter.

New firmware v2.01

• Corrected the phenomenon of displaying white corners on DNGs or CinemaDNGs in some development software when using the following combination:
  • SIGMA fp and Panasonic’s LUMIX S 20-60mm F3.5-5.6 with the Lens Optics Correction function Vignetting setting set to ‘auto’, when the focal length is 20mm and aperture value of F3.5.
• Corrected the bug related to Blackmagic RAW codec recording over HDMI with Blackmagic Video Assist 12G model manufactured by Blackmagic Design.
• Corrected the bug related to Compressed RAW over HDMI recording with Atomos Ninja V monitor-recorder.

https://www.sigma-global.com/en/download/cameras/firmware/#fp

Low light test, in a dark church and at night for Halloween decorations:

@DrDave I cannot find the spec for h264. But, really, there is absolutely no reason to use this camera and shoot using H264, even if 10bit. There is not even a log profile. You can directly attach a Samsung T5 to the body and by usb-c shoot 4K 30 in 12bit RAW. That's how the camera really shines. And with the T5 it is still more compact than any existing full-frame camera, including the new Sony small version.

You can shoot up to 4K 25 fps 8bit RAW internally, and that will actually be more robust than even 10bit All-I and looks great.

Last photo shows that no one in Sigma cared much about efficient cooling. Just look how thick the thermal pads are, meaning that designers did not move properly copper plate closer.

Thermal design is very similar to $15-30 Chinese TV boxes. Very similar, they also have such pads and plate.