We had some time again to refine our Rolling Shutter measurements and to measure the Blackmagic URSA Mini Pro 4,6K. Since such actions occasionally lead to new findings or measurement results, which (if at all) would only appear in a later article (or even just wander wordlessly into our database), we have decided to publish new findings from our everyday testing as short news, if they could be of interest for a larger public.
In this case we have determined very accurate rolling shutter times for the Blackmagic URSA Mini Pro 4.6K. The built-in Fairchild sensor can shine with remarkable values: At full sensor readout (i.e. 4.6K with 4608 x 2592 sensors) we measure about 15 ms readout time (our exact value is 15.22 ms). If one films in UHD4K or FullHD with Blackmagic RAW or CDNG, only a part of the sensor surface is read out, which further improves the rolling shutter times. In 2160p 12.57ms and in 1080p only 6.30ms can be admired.
During the measurements in ProRES we landed constant for all formats (4.6K, 4K, 2K, FullHD) at a readout value of 15.35ms. And we found something that has flown under our radar so far. In ProRES, the URSA Mini Pro 4.6K always scales the sensor to the set target format. This means that in ProRES the full sensor is always read out and then scaled to UHD or FullHD for recording. This means that UHD or FullHD recording without a sensor section is also possible. But then always with the rolling shutter timing of the entire sensor area. Again something learned...
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