Measuring rolling shutter: put a number on this issue!

Rolling shutter should not depend on whether you record BRAW or cDNG, so: 16.2ms for the 4096x2160 option, and linearly scale that by the number of rows you want to read in the other modes (this may not be exact but it should be pretty close)
 
Here is the Zcam E2 in A LOT of different modes:

E2-4k-24fps-lowjello 8.2ms
E2-4k-30fps 11.0ms
E2-4k-30fps-lowjello 7.9ms
E2-4k-30fps-WDR 15.7ms
E2-4k-60fps-lowjello 8.3ms
E2-4k-120fps-VFR 7.7ms
E2-33x27-24fps 14.7ms
E2-33x27-30fps 13.7ms
E2-33x27-30fps-WDR 32.3ms

All pretty good, except for that last wide-DR anamorphic mode
 
Blackmagic URSA Mini Pro 12K

Full 12K : ~15.5ms
12K 2.4:1 : ~12.3ms
8K/4K (full field of view) : ~8.5ms*
6K crop : ~7.8ms
8K 2.4:1 (full width) : ~6.7ms*
4K crop : ~4.25ms*


*We hope to improve this slightly in an update
 
Last edited:
CaptainHook said:
Blackmagic URSA Mini Pro 12K

Full 12K : ~15.5ms
8K/4K (full field of view) : ~8.5ms*
6K crop : ~7.8ms
4K crop : ~4.25ms*


*We hope to improve this slightly in an update
Click to expand...
How is the camera able to do a full sensor readout for 8K or 4K with a faster readout time than for 12K?
 
Might be data transfer off the imager, since it's CMOS, they could be doing a lot of DSP super sampling right on the imager. Or it's binning.
 
CaptainHook said:
Blackmagic URSA Mini Pro 12K

Full 12K : ~15.5ms
12K 2.4:1 : ~12.3ms
8K/4K (full field of view) : ~8.5ms*
6K crop : ~7.8ms
8K 2.4:1 (full width) : ~6.7ms*
4K crop : ~4.25ms*


*We hope to improve this slightly in an update
Click to expand...

I edited the above to add the 2.4:1 options
 
CaptainHook said:
Blackmagic URSA Mini Pro 12K

Full 12K : ~15.5ms
12K 2.4:1 : ~12.3ms
8K/4K (full field of view) : ~8.5ms*
6K crop : ~7.8ms
8K 2.4:1 (full width) : ~6.7ms*
4K crop : ~4.25ms*


*We hope to improve this slightly in an update
Click to expand...

WOW that's really impressive performance, it's an amazing feat that a 12k sensor can be read so fast

(thanks again for the figures, I added them to the table, including the 2.4 numbers)
 
With the 7.0 update that has just gone live on the Blackmagic site, the read out speeds on the 12K are now:

12k 17:9 -> 15.55ms
12k 2.4:1 -> 12.27ms
8k 17:9 (full FOV) -> 7.78ms
4k 17:9 (full FOV) -> 7.78ms
6k Super16 -> 7.78ms
8k 2.4:1 (full width) -> 6.13ms
4k 2.4:1 (full width) -> 6.13ms
4k Super16 -> 3.89ms
 
Hey Sam!

Anyone has the Canon R5 measurements in Full Frame and in the Crop Mode (oversampled from 5.1K)?

Cined measured 15.5ms in full frame so it should be less than 10ms for the crop mode, right?

But I'd love to also hear from someone who has it or has read a test somewhere...
 
I don't have a test for that one, and I haven't looked for it either: it's not a camera I would consider using. The new cined methodology looks good, I'm not sure the numbers can be compared with mine but I'd take that measuremena as a strong sign that it has reasonably good RS.
 
The rolling shutter tests from Slashcam for the R5 report essentially the same numbers as CineD:
https://translate.google.com/transl...e-Rolling-Shutter-Werte-der-Canon-EOS-R5.html

8K or 4K HQ (up to 30 fps): 16 ms
4K regular (up to 60 fps): 10 ms
4K 120 fps: 8 ms
HD (up to 60 fps): 10 ms

They didn't test the APS-C crop mode, but given that this mode is always oversampled from a 5.1K full pixel readout, the rolling shutter times should be proportional to those for the 8K readout modes, which would put them under 10 ms.
 
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