As so often John Brawley had the task to film demo material with the 
recently introduced URSA Mini Pro 12K. As he points out, the filming was done with an early pre-production prototype, which was equipped with the new sensor, but also with older components, so there will probably be slight changes in terms of noise and colors. The new Color Science 5 was, as it seems, already on board. The Zeiss Supreme Primes were used on lenses.
Two clips are now available -- one shows footage shot in 12Kp24, the second and newer clip mixes footage from 12K, 8K and 4K camera modes, also at different frame rates. Unfortunately, it is not possible to tell which BRAW quality setting was used. Also included is a 4K Super16 crop shot at 220fps. So here you can get an idea of the new in-camera scaling:
In a longer blog post Brawley tells about the shootings and also gives more interesting information about the new Super35 sensor. Blackmagic has designed it completely by himself for the first time and only stated at the launch that it has the same number of red, green and blue pixels and is therefore optimized for images in different resolutions. At the same time the manufacturer states a dynamic of 14 f-stops, which is a bit less than the Ursa Mini Pro 4.6K G2, but sounds remarkably good for an 80MP sensor of this size. Because the sensor pixels are only 2.2µm in size.
In fact, according to Brawley, the sensor contains pure luma sensors in addition to the red, green and blue sensor pixels. Instead of the classic Bayer 2x2 raster, the same sensor area therefore contains a 6x6 RGBW raster with 6G, 6R, 6B as well as 18W pixels. Thus, extra brightness information is available for the image calculation. Since the Blackmagic RAW Codec is optimized for this sensor, an intelligent combination of the sensor information is possible to scale down from 12K resolution to a clean 8K or 4K directly in the camera. Due to the high resolution, it is also important to use extremely high quality lenses.
