F55: Rolling/Global shutter Alexa, Red, F55

Thanks for showing but I don't see the point since the F55 has a global shutter? It has no rolling shutter so should be excluded from the comparison.
 
Not quite. CMOS sensors tend to skew side to side. CCD cameras are prone to a vertical smear. Especially with bright lights and up and down movement.
 
A CMOS sensor as the one in the F55 does not skew. There are other issues with CMOS and CCD but we are discussing rolling shutter and the CMOS in the F55 and any CCD will not skew. They behave the same in this matter.
 
Osslund said:
A CMOS sensor as the one in the F55 does not skew. There are other issues with CMOS and CCD but we are discussing rolling shutter and the CMOS in the F55 and any CCD will not skew. They behave the same in this matter.
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I wasn't saying the F55 would skew.

Very few CMOS sensors have global shutter. The F55 and one of the older Pansonics are among those.

CMOS generally read from top to bottom causing skew with sideways motion. And yes, a CCD doesn't skew because it reads from side to side. I was just pointing out that a CCD also causes artifacts with vertical motion unless it has a global shutter too. Fortunately vertical motion is much less common.
 
The dude did the test for his comparisons. Whether you like it, think it's fair, or is accurate isn't going to change it.
Isn't one of the buzzes about the F55, it's global shutter?

With some much yackety-yack over rolling-shutter since CMOS, I think it's a very valid comparison.
 
It certainly proves the F55 does what the ARRI and RED do not. Sure we might already know the expected results without having to see it, but still for many of us I think its nice to actually to see.
 
Red is claiming a faster reset time on the Dragon sensor, but its still going to have skew as its not a global shutter. Also Red MX and Epics have noise in low light areas. It will be interesting if the Dragon will be able to overcome any of this.
 
Chris Adler said:
The next time I have to shoot footage of spinning propellers I'll consider a Sony.
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Or a bicyclist, car, motorcyclist in the woods, in a city, by a fence, on a bridge or anywhere else you pan to follow motion with something vertical in the background. If you're only shooting talking head it will make no difference. LOL
 
I pan to follow motion all the time and have never lost a shot to rolling shutter, but I don't make many bicycle against fence movies. I'm not trying to diss the technology. I think it's great there are cameras we can use when very specific types of shots require them.
 
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Of course you don't loose the shot. It just doesn't look like film any more than aliasing does. Just another digital artifact that you can now get rid of.
 
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