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Sony EX1 Severe LongGop Problems
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Or perhaps the few thousand owners of the EX1’s that are out there aren’t seeing this problem like you are. I’m sure if they had it would have come up before and it hasn’t.
What detail level was the camera set to?
Steve Connor
Adrenalin TelevisionHave you tried “Search Posts”? Enlightenment may be there.
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I have just taken my EX1 out to the backyard and filmed grass close-up, with different shutter speeds and different panning speeds.
At 1080 24p, at 48th of a second shutter speed, when panning, I did get a blur, which is expected (in fact, you want that blur to give the motion smoothness instead of a strobing quality), and at that shutter speed I didn’t see any individual frames that were sharper than others (i.e., key frames).
At 1000th or 2000th of a second shutter speed, each frame was equally sharp and not blurred — I couldn’t replicate what you are describing. Each individual frame was sharp and there were no frames that looked sharper than other frames (key frames).
Admittedly I was looking at the images on my Mac screen, full frame (not projected using an HD projector). But, given what you describe, I would think that if the image were to be out of focus it would be noticeable on the Mac full screen.
It would be interesting if others were to try this experiment as well.
Eli
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I work with footage mainly shot with the EX1 and I do see what you are talking about. But I thought it had to do with the CMOS chip, not the Long GOP MPEG2. Along the same lines with the problem it has with photo flashes.
The problem not only on the resulting pictures, but when shooting… if you put Peaking on to get you focus right, it’s pretty hard to see the peaking edges when the subject is moving because of the blur. My thinking was that it’s a CMOS effect since the LCD is probably shoing the raw (uncompressed) output of the CMOS.
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I watched it on my mac. If you look at it single frame you will see the compression kicking in in the green grass, the wall and the leaves. Motion blur looks different.
Again on my test I compared six cameras side by side shot simultaneously with six camera operators. Only the EX1 performed strange on motion. The other cameras had simple motion blur only the EX1 went soft on detail whereas the others remained relatively sharp. Especially the Panasonics of course.
I will post some clips this afternoon for you all to see.
Best
Richard -
Hi Eli
Very interesting. I did the smae shots across grass and everything went soft even on the slightest motion. It didn’t matter if I tried it in interlaced or 25p. I didn’t try high shutterspeeds as I would never use it for regular shoots. People , motion, water looks completely unnatural in 1/1000 of a second.
Is there anyway you could post your pan across the grass on a site? In my opinion the blur is not motion blur but compression. You should be able to tell the difference when you pan really slow. If it goes soft even on very slow movement it’s compression. I will post my shots this afternoon.
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Richard,
You are not crazy. Here is a link to a post on this forum from Jan 6 that explains it.
https://forums.creativecow.net/readpost/142/856569I’ve seen this same issue on Discovery Channel, so it’s not uncommon.
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I completely agree that 1000th sec shutter speed is not appropriate 99% of the time. But, for this test, a high shutter speed will tell you if the blur is motion blur or codec blur…
Maybe I wasn’t looking at the right place, but at 1000th sec shutter speed I couldn’t see any difference… and I couldn’t see key-frames.
I already deleted these clips, but I’ll shoot another test later today and post it.
Eli
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I am currently uploading about 12 shots where you can all compare the EX1 and the Z7 in their original quality. You should download the quicktimes as source files.
As soon as it’s uploaded I will post the link. You will need good broadband though. Total diskspace of the site is almost 800mb.
Best
Richard -
Just a thought but have you tried looking at your pictures on a CRT monitor? I see the effect you are describing on everything that is shown on my LCD 32″ Panasonic screen.
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