GH2 official discussion thread

yes, the B frames (hopefully fully implemented AVC codec), manual audio codec and the HDMI out is a huge plus. I'm waiting for this camera (hopefully body only) and I'll be waiting in line on release day for sure.

Honestly though I don't really care for touch screens and some of the other things. I could get use out of the 60p-in-60i thing if it actually works as described and de-interlaces to 60p. I don't really care for super high ISO either. I'd just rather have super clean normal ISO values.

Not really sure what else is in store but I'm excited.
 
As far as HDMI monitoring, compatibility with the new AJA Ki Pro Mini has been mentioned by several people. This would be a deal maker for me if I could get direct ProRes recording with the GH2 using this. Would also eliminate the hassle of double-system sound if it does indeed include metered XLR inputs and phantom power.

Any one know yet if this will work with the GH2? Of course, it's a go with the AF-100.

http://aja.com/products/kipro/ki-pro...escription.php
 
"If the tele crop is 2.6 times and not variable it will not benefit 16mm lenses. It will leave a chip area at 1/2" or smaller. 2x crop gets 2/3" which is actually slightly smaller than a 16mm image circle. I'm hoping for a variable push in that will allow to just eliminate vignette while maintaining full video resolution"

Agreed a lot of cool c-mount lenses would benefit from a variable crop. I hope that there is a possibility for this on the production camera or in a firmware release.
 
Ben_B said:
Thats what you get when you get for not being in America! Seriously though, that sucks man. Can you shoot 24p and convert to 25p? They do that for broadcast all the time in PAL land for US movies, etc.
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When they convert 24p to 25p they usually just speed it up by 4% (approx). But when shooting with 5 or 6 cameras in sync, having one record in 24p while the rest in 25p is not very productive :(
 
PAL is supported :


* Full-HD (1,920 x 1,080) movies are recorded at 60i (NTSC) / 50i (PAL). HD (1,280 x 720) movies are output and recorded by the image sensor at 60p (NTSC) / 50p (PAL). (from the panasonic uk website)
 
nobbystylus said:
PAL is supported :


* Full-HD (1,920 x 1,080) movies are recorded at 60i (NTSC) / 50i (PAL). HD (1,280 x 720) movies are output and recorded by the image sensor at 60p (NTSC) / 50p (PAL). (from the panasonic uk website)
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Yeah, but there's been no mention at all about native 25p. Which sucks for about 2/3ds of the world. :crybaby:
 
I think the speculation is that, PAL users wont be able to shoot 25p 1080 as on the GH1, but will have to deinterlace to get there. I would rather wait and see until somebody actually uses the camera and confirms that's how it will work.

I wonder how well the HDRxx mode will work:cheesy:

The new Intelligent D-range Control offers even more natural looking by optimizing the exposure for each part of an image, preventing blocked shadows and blown highlights and helping ensure that gradation and details are reproduced beautifully including the blue color of the sky. An automatic backlight compensation function is activated whenever the camera detects the subject in backlight.
 
yes i'm in PAL land and would prefer 1080 25p, but i'm hoping that from the 50i image we can get hold of the full 50p data and then just throw every other frame away..
 
Can I ask where you are getting your information that the AF100 chip us the same as the GH2 chip? My understanding was the AF chip was developed specifically for that camera. Im not saying your info is incorrect either - I just want to know the source.

svecher said:
avchd.gif
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So the best any PAL user can hope for to get 25P is 17MBPS in a 50i wrapper?
 
Pertaining to the AF100, even if it was the same sensor, as pointed out, the OLPF is more than likely optimized for the full shooting resolution of the camera. This means that I'd expect to see the same aliasing/moire characteristics of the GH1 but with hopefully an improved read/reset time for reduced rolling shutter.

Granted, at this price point, it seems like a great deal, especially if all the improvements mentioned are the case. But knocking out the AF100 sales for those who were getting one, I don't see it. Nothing about the GH2 has swayed my decision, and given the recent changes to the GH1 to prevent hacking, I can only imagine that the GH2 will follow down the same path.

Definitely two different market segments.

If you think the cameras are comparable (GH2 and AF100) I think you need to go read more about the AF100 because the number of features it has is OUTSTANDING to me. And it actually does allow you to stop using your ND filters if you want to use any of the three on the filter wheel that is built in to the camera!

Granted the AF100 is not perfect either, but unlike the GH2, the sensor is actually optimized FOR video, which for me is important. I am tired of aliasing/moire.

However, for using the GH2 in crop mode, where if it is 1:1 pixel reads so the OLPF will be tuned appropriately, the GH2 might in fact be an AWESOME camera for smaller lenses as mentioned!!! I think that is an important consideration as well and one not addressed well on any camera at the moment!
 
grimepoch said:
Pertaining to the AF100, even if it was the same sensor, as pointed out, the OLPF is more than likely optimized for the full shooting resolution of the camera. This means that I'd expect to see the same aliasing/moire characteristics of the GH1

Granted the AF100 is not perfect either, but unlike the GH2, the sensor is actually optimized FOR video, which for me is important. I am tired of aliasing/moire.
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Have you used the GH1?
 
shooter_ said:
Have you used the GH1?
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No, I have not, but I am highly familiar with the material that comes off of it. While an improvement over the Canon implementation by far (concerning the rainbow it produces which is horrible), there is still a huge amount of aliasing and moire present in the images. This is of course on both the GH1 and GH13 footage since the issue is with the OLPF, and I have reviewed material from both as I was curious how much more you'd see with a cleaner image in high detail scenes.

I'm still waiting to see some results from the AF100 personally, but I do respect Barry's opinion and he's said that the new sensor and OLPF have greatly reduced the aliasing/moire as compared to the GH1. Given I know how much better the GH1 is than the Canon's, this is a huge thing for me.

It won't all be gone, I am sure, because of how the OLPF is typically picked based on the difference in sampling on a bayer pattern, but tuned to the target resolution for sure.
 
Originally Posted by grimepoch
Pertaining to the AF100, even if it was the same sensor, as pointed out, the OLPF is more than likely optimized for the full shooting resolution of the camera. This means that I'd expect to see the same aliasing/moire characteristics of the GH1
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If you really knew anything about the GH1 you would know that, as stated by Barry Green in a few occasions, the aliasing and moire in the GH1 is very negligible. And that is one of the many pluses with the camera. If the GH2 improves even a little on that it would be pretty fantastic in that department alone. Plus with all the other upgrades it should shoot some pretty awesome images for sure.
 
I'm inclined to disagree with dpreview's assessment:

The GH2 offers a similar video specification to the GH1 but with one important difference - the sensor no longer doubles-up its sensor output in order to create its highest-speed video (the GH1 sensor could capture at 24 or 25 fps, which was then put out as 60i or 50i footage). Instead, the latest sensor can capture progressive (whole frames) at 60 or 50 fps. Its output is still limited to 60i or 50i because there are no common ways to distribute 60p or 50p footage, but this should certainly improve the output quality.
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Each field in a 60i video stream contains only 540 scan lines - half the 1080p FHD vertical resolution of the sensor. If the GH2 is recording its 60i stream from a sensor that is being sampled at 60fps, then it is recording with a vertical resolution of only 540p. While these 60i fields interleave into a 30fps sequence with a vertical resolution of 1080i, it is NOT 1080p, it is interlaced video and there is no pixel-accurate pulldown process which will produce even a native 30p stream, much less 60p video. It is inevitably 1080i60 footage and there is no legitimate way to make it progressive.

This would apply to PAL 50i streams as well, and if that is the way the camera scans the sensor, there would be no way to film in true 1080p25, only in 1080i50.
 
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I will say one thing, all these people clamoring for the 60D, if I were in the boat to buy something right now, I would be seriously trying to wait on the GH2 without question. Canon has done NOTHING to improve their image quality so far. I am so tired of the rainbows that even skittles make me shudder :)
 
1080p25

1080p25

Regarding 1080i50 for PAL users, I think there should be a different approach.

It seems that Panasonic was listening to us customers as the GH2 addresses most of the features we asked for, and as getting 25p out of 50p is ridiculously easy to apply .
I think our demand should get to Panasonic and hopefully we will get this poor mistake fixed on the first firmware.

Some thoughts : GH2 can record 50p , 24p , 60p and maybe even 30p as the 80%
slomo is derived from 30p on NTSC and PAL models (outputted as 24p ) , so for NTSC models 30p is already there ...
 
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