rawshooter

The question still is: What is the power consumption of this solution? It may be fast and affordable but drain the battery much faster than a T5.

[deleted, misread something]

Actually, it would be helpful if 10bit RAW was encoded as Log values (instead of linear values, as it is with the current firmware). Same actually with 12bit RAW, since the camera has a 14bit DAC...

The Samyang 35mm/2.8 gives a similar good package as the Panasonic 20mm/1.7, and is comparable in field-of-view and optical quality on full frame cameras.

Please just read the patents. I provided the links further above. They are very broad patents for a video camera that records compressed raw video.

The Aputure LS-Mini 20 comes close and is very affordable: https://store.aputure.com/products/ls-mini20/

The patent covers any form of compressed RAW video recording, whether internal or external. This is why Atomos signed a licensing agreement with RED for its external recorders that record ProRes RAW: https://www.atomos.com/press-releases/atomos-and-red-are-pleased-to-announce-a-royalty-based-licence-agreement Btw., the patents are linked on RED's website and publicly readable: https://www.red.com/legal/patent

Unfortunately, not. The patent is about any form of compressed RAW.

Because BRAW is technically not RAW, but 12bit YUV with a log gamma curve.

Big bummer. The RED patent also poses a threat to MagicLantern as MLV is compressed RAW video.

A firmware update is out that fixes the CinemaDNG problems: https://www.sigma-global.com/en/news/2019/11/08/2329/

You are right. I used Imagemagick's function for determining the number of discrete colors in an image, and the results were: 8bit-A001_005_20191106_000004.DNG: 3707837 10bit-A001_006_20191106_000005.DNG: 4068251 12bit-A001_007_20191106_000006.DNG: 5776266 The relatively little difference in total colors is probably related to the scene not having much contrast.

Could it be that you mixed up the 8bit and the 10bit files? After doing a bit of an extreme grading (Kodachrome LUT + pushing contrasts), I'm getting this: 12bit 10bit (really 8bit?) 8bit (really 10bit?) 12bit 10bit (really 8bit?) 8bit (really 10bit?)

1:1 crops of the above DNGs, developed with RawTherapee, without noise filtering/image improvements: APS-C crop vs. full frame APS-C crop vs. full frame I'd say that APS-C is noisier... So maybe I need to revise my earlier theory, and some binning is going on in full frame 4K (although it's not as good as the bicubic scale of a 6K DNG still to 4K with software in post); if the camera would just skip pixels, noise levels should have been identical.

Thanks to @Brian Williams' two files, we can almost safely conclude that the Sigma FP skips sensor pixels when it saves the 6K sensor data into 4K CinemaDNG. Here's a comparison between a 1:1 crop of (a) the 6K still DNG developed with RawTherapee (with noise filtering, sharpening and other enhancements completely off) as a 16bit TIFF which was then downscaled to 4K using bicubic scaling (binning); (b) the 4K CinemaDNG frame developed with RawTherapee without scaling. The downscaled 6K DNG still (left) clearly shows more details and less noise than the 4K CinemaDNG (right). So effectively, the camera doesn't really benefit from the full frame sensor in CinemaDNG and might even produce a better video image in APS-C mode.

@Brian Williams - thank you so much for this! This clarifies a lot. I'm still wondering how, technically, the camera downsamples the sensor's 6K Bayer pattern to the 4K Bayer pattern of the CinemaDNG frames...

Would be really grateful if people who own/used the camera could clarify whether or not it crops the sensor when shooting 4K CinemaDNG. Normally, RAW video means 1:1 sensor readout. Since the FP has a 6K sensor, this would then mean a crop from full frame (36mm) to APS-C (24mm). However, it seems - from reading the manual - that the APS-C crop is only optional and the camera can record 4K CinemaDNG with full sensor readout. Is it then binned RAW?!?

Rookie question: Does the Sigma fp crop the sensor when recording 4K CinemaDNG from 6K sensor, or is the CinemaDNG downsampled (like MagicLantern Raw)? Same question re: the 2K CinemaDNG recording...