Sony XDCAM EX

To show the effect of rolling shutter, so when we get the cam, we can play sherlock holmes and go recognize and go hunt for them :p
 
There are many effects from rolling shutter; for some reason people seem to focus on the leaning/skew as being "the" issue. It's best to educate yourself on what the rolling shutter is, and how it affects footage, and then you can be more informed as to whether it's likely to cause an issue in your shooting circumstances or not.
 
The rolling shutter on that hv20 doesn't look too bad imo...
If you check the 25p clip of the tennis, when the second girl smashes and then when she steps backwards, it looks like the footage is wobbling. Am I right when I say this? Anyone else seen it?
 
Please post a sample of what you are seeing.

I SERIOUSLY doubt you will see it in the tennis footage.

As you know, "a picture is worth a thousand words"
 
According to the ccd cs CMOS rolling shutter article posted here (read it long ago) on dvxuser.com, there are 3 main problems of a rolling shutter cam; Skew, Wobble and Partial Exposure.

If anyone has footage of partial exposure, please do post the link.

The first link to the hv20 footage is an example of skew, the second link is an example of a wobble. I unfortunately cannot find an example of partial exposure footage from a rolling shutter cam, for the exception of what was posted on the original article here. (http://dvxuser.com/jason/CMOS-CCD/).

The 3rd footage link is from a real world footage of a fast moving object (the bicyclist) taken from a $950 hv20 cam.
 
Here's an example of rolling-shutter CMOS vs. global-shutter CCD, doing the exact same task. I tried to treat the two exactly the same, and I tried the rolling shutter with OIS on and OIS off just to see what difference it would make. So the difference you are seeing here is strictly due to the effects of the rolling shutter, and not due to OIS or frame rates or shutter speeds or different handling or anything else.
http://www.icexpo.com/HV20/HV20-wobbles.mp4X

(right-click, save-as, and remove the trailing "X" from the filename)

And here's another example, download the testmotion2 file. This is from a guy who had the camera mounted on a car rig and slammed the car door.
http://www.hv20.com/archive/index.php?t-1409.html

If you can't download it from there, try this link: http://www.megaupload.com/?d=IEO1G52V

Anyway, these are not from the EX1, but as long as we're posting links that show why rolling shutter in and of itself is a concern, these links show why. And why I think any potential owner of a rolling-shutter system should make sure that they're not sweeping the issue under the rug, but rather that it's been properly vetted to find out whether it's a concern in this particular product or not.
 
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Thank you Barry !!

Barry_Green said:
Here's an example of rolling-shutter CMOS vs. global-shutter CCD, doing the exact same task. I tried to treat the two exactly the same, and I tried the rolling shutter with OIS on and OIS off just to see what difference it would make. So the difference you are seeing here is strictly due to the effects of the rolling shutter, and not due to OIS or frame rates or shutter speeds or different handling or anything else.
http://www.icexpo.com/HV20/HV20-wobbles.mp4X

(right-click, save-as, and remove the trailing "X" from the filename)

And here's another example, download the testmotion2 file. This is from a guy who had the camera mounted on a car rig and slammed the car door.
http://www.hv20.com/archive/index.php?t-1409.html

If you can't download it from there, try this link: http://www.megaupload.com/?d=IEO1G52V

Anyway, these are not from the EX1, but as long as we're posting links that show why rolling shutter in and of itself is a concern, these links show why. And why I think any potential owner of a rolling-shutter system should make sure that they're not sweeping the issue under the rug, but rather that it's been properly vetted to find out whether it's a concern in this particular product or not.
Click to expand...
 
Does anyone know the thread size of the EX-1? IS the the same as an HVX? Looking to see if the Letus-EX fits.
 
Does anyone know the thread size of the EX-1? IS the the same as an HVX? Looking to see if the Letus-EX fits.
Click to expand...
I don't think it's the same, I think it's either 72mm or 77mm isn't it? Either way your Letus should fit using a step-up ring.
 
RichardVClark said:
The hv20 helicopter clip keeps me up at night. I would have tossed the camera out the window with footage that repulsive.
Click to expand...
That's the footage that started me on the quest to understanding what in the world this rolling-shutter phenomenon was all about. I mean, I even had an HV20 at that time. And the idea that your camcorder could do that to your footage was unthinkable. Yet I've found many examples of such things, as well as many other effects.

So if I'm a bit of a crusader on the subject of rolling shutter, this is why.

Note, I am not saying the EX1 will exhibit that type of effect, nor am I saying that the Red One will. But they might, and whenever there's a rolling shutter in the mix, I think it's important to understand just what the consequences could be based on that manufacturer's particular implementation. If it's possible to minimize or eliminate the effect, let's find out. So far I haven't found a single rolling-shutter camera that's immune to the effect, and I've viewed footage or handled every one of them that I can find (EX1 excepted, but I've had someone else test it and confirm that yes there's "some" wobble in it too). Haven't been able to quantify that to see how much of an issue it may be yet.

I don't give a flying hoot about a little bit of leaning in a swish pan. I'm talking about stuff like that helicopter stuff which can completely ruin your footage.
 
I totally agree Barry. Prior to the helicopter footage, I thought you were being a little critical of cameras that utilize rolling-shutters. Now I can clearly see why you would be hesitant about any camera that utilizes a rolling shutter.

With that said, the ex1 will be the best camera on the market and exhibit non of the nasty rolling shutter effects. Why you ask? Because mine is in the mail.:thumbsup:
 
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