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-   -   EX1 footage thread - keep it coming! (https://www.dvinfo.net/forum/sony-xdcam-ex-pro-handhelds/108398-ex1-footage-thread-keep-coming.html)

Andreas Johansson November 25th, 2007 12:52 PM

I put up a file with all formats that can be used for frame rec recording as a zip file. The card structure is complete in the zipfile.

And I will not use other host than mine, I have good reasons for it so lets not keep that discussion going. Don't set up mirrors without asking me first, but I guess the answer will be no please don't.

I have a new hosting for the files now and maybe the old files will be online again if I find the time to. But the Tennis shots will not be online again and there is a good reason for that to.

ex.bolanski.com

Steven Thomas November 25th, 2007 01:53 PM

Andreas thank your for the vignette tests!
Question, was the aperture wide open for these tests shots?
If it has a vignetting problem, you will see it more with the aperture wide open.

I did not see any vignetting issues in your samples. I believe some of us wonder if you were to pan the camera from left to right while doing this test, would a vignetting issue show itself?


Hey, is it just me or is this camera extremely clean!
I can not believe shooting the wall in that low light condition that the image is that clean!
Amazing. It's also has a lot of detail.

Eric Pascarelli November 25th, 2007 02:17 PM

About 4 to 5 seconds into Andreas' 1080p25 clip there is a very slight darkening in the upper left corner. Likewise in the 720 clip (which zooms out rather than in) there is the same slight darkening toward the wide side.

Both of these seem to happen at the same focal length on the lens. It seems to be a less severe version of what Paul Joy is describing, in that it does not happen at either zoom extreme, but at a point in the middle, close to the wide side.

This slight darkening, combined with OIS and different aperture or focus settings could be what's causing the more extreme cases.

What's happening on Andreas' camera is perfectly acceptable to me, and I won't cancel my order over it. On a film camera this would be considered within spec (I've seen much worse than that make it to the big screen). But if it got much more extreme than that I wold start to get concerned.

Steven Thomas November 25th, 2007 02:24 PM

Yes, it's "very-very" slight. It may not be noiticable at all for some. But you may be right - what will it look like if the camera is panned with OIS on?

I will perform this test at the end of next week.

Andreas Johansson November 25th, 2007 03:55 PM

Quote:

Originally Posted by Steven Thomas (Post 781612)
Andreas thank your for the vignette tests!
Question, was the aperture wide open for these tests shots?
If it has a vignetting problem, you will see it more with the aperture wide open.

I did not see any vignetting issues in your samples. I believe some of us wonder if you were to pan the camera from left to right while doing this test, would a vignetting issue show itself?


Hey, is it just me or is this camera extremely clean!
I can not believe shooting the wall in that low light condition that the image is that clean!
Amazing. It's also has a lot of detail.

I have to check that. I know I used auto focus, I don't remember if i did auto iris or if I set zebra1 to 90% and kept it around there not to over expose it. I know I though of both.

I can do it again if you need to. I didn't know exactly what was needed to show this problem. I could do some panning but I don't have a wall big enough to pan across and if it only shows at some specific point while zooming I need to do allot of pan/zooming.

The wall is a projector screen by the way and the lights were the normal celling lights in our studio, no studio lights used at all.

/Andy

Steven Thomas November 25th, 2007 04:18 PM

Thank you Andreas for going out of your way and helping us understand the EX1 and any possible issues.

If you're up for it, here's a suggestion on capturing this data:

Please record while running the tests

1. Set the camera for manual operation on a tripod with the Aperture wide open, OIS on.

2. Adjust the room lighting and ND filters to get a fairly bright exposure, but not blowing out the highlights.

3. Hook up an external monitor and start by setting the focal length to 10mm. While keeping the camera stationary, carefully look for vignetting.
Note, based on what we've seen, It may show in the top left corner first.

4. Slowly zoom between 10mm through 25mm and look for the slightest problem.

5. If you see a problem, remember at what focal length the problem is viewed. Now shut off the OIS and determine if the problem still exists.

6. Now, turn back on OIS. Leave the camera's focal point set to where you think you may see the problem. Next pan the camera left to right at a moderate speed. Try this at several different focal point locations between 10mm and 25mm.

7. Ignore everything I've written and perform your own test. LOL




.

Andreas Johansson November 25th, 2007 04:41 PM

Would it work whit a green screen wall?

Steven Thomas November 25th, 2007 04:52 PM

It might be hard to see with the green screen, but you could try.
Also, when panning, you should not not have to pan much.
Just enough to make the OIS system have to work.

Paul Joy November 25th, 2007 04:53 PM

Certainly with the camera I had the Iris didn't seem to play any part in the problem, other than to make it easy to see as the image became brighter. On mine the worst effect was between 10mm and 25mm.

I would be happy with my camera if it were the same as Andreas' 720p clip, I can't see any problems there at all.

Paul.

Steven Thomas November 25th, 2007 05:07 PM

I hear you. It does not appear to have the normal vignetting issue. There has been some discussion about when the camera is jerked around.

I agree, I believe Andreas's camera is fine.
Chris, Barlow still thinks that the SDI captures are a tad softer than the internal. Do you concur?
He agrees it does not make sense, but he's seeing something.

Can you post two identical frames, one XDCAM, the other SDI?

Simon Wyndham November 25th, 2007 06:22 PM

I can't be arsed to read this thread. I have an EX here in front of me. Tell me what to do to solve whatever problem and I'll do it. :)

Steven Thomas November 25th, 2007 06:33 PM

Thanks a million Simon!

Actually, there's been some talk that the SDI out frames appears softer (or slightly blurred) compared to the internal XDCAM capture. We realize that this does not make sense, but if you would not mind providing a comparison between an SDI vs XDCAM captured frame?

Also, there's been some discussion regarding possible vignetting oddly happening between 10mm-25mm range. It's also been thought that the OIS under rapid camera movement may be aggrivating the condtion.

We know for sure one user has vignetting in this range. In his case, it's very obvious and he has returned his camera for exchange.

Any help would be appreciated.

Simon Wyndham November 25th, 2007 06:45 PM

I'll give it a look in the morning.

Can't understand it though. If it's vignetting at 10, it should be vignetting even more at 5.8. I can understand if the OIS is contributing though. But what are the results on the problem camera at 5.8?

Steven Thomas November 25th, 2007 06:49 PM

Well...
We didn't say it makes sense :), but Paul Joy sure proved it happens!
He provided a video of a white wall as he started wide and slowly ramped to full zoom. Oddly enough, at full wide it was not there!
Based on his video, it sure looks like he's right. he said the range was 10-25mm.
Very strange indeed.

Here's paul's small video clip showing his issue:
http://www.dvinfo.net/conf/attachmen...2&d=1195761898

Chris Forbes November 25th, 2007 11:41 PM

One thing that logic tells us is that the camera is not the only fail point in the chain from Camera to SDI Capture to Critical evaluation.

But in order for us to say "this camera is doing this" we would have to, by process of elimination, verify:

the HDSDI connector, the first BNC cable, the barrel joining the two BNC cables to each other, the Second BNC cable, the capture card, the HDSDI connector on the capture card, the Sheer video codec that he was recoding in, the raid that he was capturing with, and the monitor that he was viewing the clips with.

He showed me what he saw on the clips. What he saw as softness I saw as motion blur due to the 24p 48 speed shutter. Either way more testing would have to take place before anything could be said one way or the other.

But I will say for my part I am completely happy with this camera.

Steven Thomas November 26th, 2007 08:02 AM

I hear you Chris.
That's why actual SDI vs internal frame grabs would solve this issue.

Your are right about all the other possibilities. Hopefully Simon will be able to "shed some light".

Barlow Elton November 26th, 2007 03:16 PM

Clips were taken down. Apparently they're not working right for others.

Steven Thomas November 26th, 2007 04:43 PM

Thanks Barlow.
I'm going to do some testing with detail on and off this Thursday.

It's possible it's doing something with NR with the detail parameter off.

Hey, This dang PC vs MAC is killing me.
I can't get your files to work in QT.
I downloaded the free SheerVideo reader codec for QT for Windows.

Barlow Elton November 27th, 2007 02:16 AM

Hmm, wonder what the problem is? It should work but I've never tried Sheer on a Windows system. ProRes should work for FCP6 users.

I've added a 10bit uncompressed QT frame. That should be available on Windows.

Steven Thomas November 27th, 2007 08:01 AM

Thanks Barlow, that frame also comes up black. I'm not sure what's up.

Joe Carney November 27th, 2007 11:39 AM

The problem is with most displays being 8bit and most video cards designed to adjust for that,even if the source is 10bit, only some industry standard testing equipment could really tell. Or some official word from Sony.

Last time I checked to see sheer at >8bit on windows, you needed AE.


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