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GH3 vs hacked GH2 quick handheld comparison


KarimNassar

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Hello so I compared the poor quality footage I was able to quickly shoot during the GH3 presentation.

The hacked gh2 footage and gh3 footage look strikingly similar.
Would be difficult to differentiate them.
The gh3 footage seems to have a little bit more noise though.

[img]http://www.freeimagehosting.net/newuploads/2rbi4.jpg[/img]

You can download the video file here:

[url="http://www.postprod.ch/clients/Eoshd/montage.zip"]http://www.postprod....shd/montage.zip[/url]

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Dynamic range test video:

The dynamic range seems to be exactly the same as on the gh2 to me.
No more details il the blacks nor whites, same specular roll off on the lamps at the top of the frame.

BUT at least one bit of good news (most noticeable in the vid) the "shooting stars" bug/artefact is now gone.

[img]http://www.freeimagehosting.net/newuploads/4ydfo.jpg[/img]

Feel free to download the video here:

[url="http://www.postprod.ch/clients/Eoshd/montage_2.zip"]http://www.postprod....d/montage_2.zip[/url]

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raw files here:

[url="http://www.postprod.ch/clients/Eoshd/raw_files.zip"]http://www.postprod....d/raw_files.zip[/url]

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the hair on the left seems to have more of a yellow tint. Also i would say the DR looks a tiny little bit better on the right picture, but thats perhaps just a gut feel or fata morgana.

But then it probably also depends on the setting (hack) you loaded. But it does not look as if an upgrade was really justified...
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Something I am wondering.
Let's assume the gh3 is only just as good as the hacked gh2.
Would a hacked gh3 show the same increase in quality as the hacked gh2?
Because 72mbps is already quite high of a bitrate isn't it, how much room for improvement from a possible hack there really is?
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The GH2 takes it. That last shot, where you've matched em up. It's just nicer, there's more detailed, no aliasing on the edge of the glasses or the stubble. The GH3 may hold the highlights better here (it was exposed lower though, so no surprise) but there's more noise and that ALIASING! It's a fizzy, nasty thing in this comparison.

Tests of people are the most important, imagine you're trying to get into watching a scene and there's aliasing dancing all over someone's face! It's pretty shocking how bad it is on the mustache, for example, really distracting. What have they done?!
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[quote name='MaxAperture Films' timestamp='1351255991' post='20356']
Karim, what lens was used in this test... same on both cameras?
[/quote]

yes and actually it is the exact same lens which I mounted on each camera one after the other.
It is the voigtlander 25mm f.95 as mentioned in the first frame of the video

I'm rendering the dynamic range video will be back in a couple of minutes with an update
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[quote name='yellow' timestamp='1351255897' post='20355']
Is there any chance of just providing the native camera files for this?
[/quote]

yes but I warn you the footage is very shaky this why I stabilized it.
Let me upload my dynamic range video and I will share the raw files.
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The additional noise viewed in the GH3 footage is likely as a result of lifting the exposure to match the GH2 in post... when you increase the gain of any signal you increase the visibility of noise. The aliasing visible in both shots is obviously from rescaling the footage in the NLE. Both cameras look good and very comparable, although I have noticed that the GH3 has less of a shift towards greenish-yellow tint than the GH2 which adds a bit more warmth to the image overall. I would say the color is closer to Canon now, but this could also be as a result of the custom picture profile that was used in this test.
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[quote name='MaxAperture Films' timestamp='1351257617' post='20359']
The additional noise viewed in the GH3 footage is likely as a result of lifting the exposure to match the GH2 in post... when you increase the gain of any signal you increase the visibility of noise. The aliasing visible in both shots is obviously from rescaling the footage in the NLE. Both cameras look good and very comparable, although I have noticed that the GH3 has less of a shift towards greenish-yellow tint than the GH2 which adds a bit more warmth to the image overall. I would say the color is closer to Canon now, but this could also be as a result of the custom picture profile that was used in this test.
[/quote]

what do you mean rescaling the footage NLE? I did not rescale anything. what is a NLE?
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[quote name='QuickHitRecord' timestamp='1351257989' post='20362']
Thanks for doing this, Karim.
[/quote]

You are very welcome, I just wish I could have done it with much more care.

[img]http://www.freeimagehosting.net/newuploads/efqhj.jpg[/img]

From my tests the gh2 (on the left) has more detail and sharpness than the gh3.

But to be fair that should be tested more carefully than handheld at a low aperture.

But all the vids I have seen so far including mine seem to indicate that the gh2 has more detail
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[quote name='KarimNassar' timestamp='1351257962' post='20361']
what do you mean rescaling the footage NLE? I did not rescale anything. what is a NLE?
[/quote]

You cropped the footage and used image stabilization, this changes the pixel scaling when it is rendered back out in the final comp and causes aliasing artifacts. This was meant as a response to jgharding's freak out, and is what you see on the rims of the glasses in both camera's footage.

To be honest, I'm getting a bit tired of watching poorly implemented comparisons that end up promoting myths about this camera's image quality. If you don't have the time to do a proper comparison with a tripod and have to rely on warp stabilization just to compare the shots, you're really not doing anyone a service because the footage is not representative of true pixel-pixel output quality. It's just muddys the water further and leads to more confusion.
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[quote name='KarimNassar' timestamp='1351259177' post='20366']
You are very welcome, I just wish I could have done it with much more care.



From my tests the gh2 (on the left) has more detail and sharpness than the gh3.

But to be fair that should be tested more carefully than handheld at a low aperture.

But all the vids I have seen so far including mine seem to indicate that the gh2 has more detail
[/quote]

I would recommend trying a sharpness test with both cameras set at 0, rather than -2 and -5. We don't know if the GH2 and GH3 are artificially softening the image at the lowest value or just removing all in-camera sharpening altogether. Comparing both at 0 should increase the liklihood of a fair comparison (no softening or sharpening) assuming Panasonics implementation methodology has not changed.
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