GH2: Blue horizontal banding?

Being to the point is not being condescending. Certainly not the intent. Take it for what you want, DvxHerb.

Deep focus shots like :34 or 1:11, etc. have quite a bit. Perhaps locking the camera down would help disguise it, but it's there. Looks like two different cameras entirely when compared to the shallower DOF shots.

And, yes, that is distracting to me simply as a viewer. Not a pixel-peeper.

To each his/her own.
 
The blue banding looks like smear to me, I have seen this before on many ccd camcorders-digital cameras and its a known phenomena with ccd, charge coupled devices, previously used and providing as we know global shutter. If you point many ccd devices at high intensity light sources you get a sensor overload, and vertical-horizontal purple-blue bands, look familiar? I wonder if this is what is happening with Panas latest impelementation, although on cmos is previously unknown due to the progressive scan of the sensor(rolling shutter!) Due to the very fast scan its almost approaching a global shutter approach for speed of reading the sensor and some sort of overload when pointed at high intensity sources might be causing this. The other thing to check is if a hot mirror,http://www.tiffen.com/press_release_Hot_Mirror_IRND.htm
ie the ir filter on the GH2 might be weak and letting in higher levels of ir and higher wave-lengths. A hot mirror filter will cut most high frequency light out. I have a hot mirror somewhere so will give it a try. Overall the effect is there, its very very slight and at normal viewing cant really be discerned for good exposure.:)
 
i think that some people with different screens might notice the banding more than others (might be a bit more brightness and it turns a lot more noticeable)
 
Roei, its definately not banding, nothing to do with banding, its over-charge of the sensor, smear or IR or both, check it out here on ccd, but I have seen it horizontal and purple on many cameras against a bright window for example, with huge purple horizontal bands, this is similar I think, but no way as bad, an inconvenience. Try pointing an IR remote at the camera lens, look how purple it is? a weak ir filter? a hot mirror will remove that but may introduce other issue as with filters!
 
i'm unsure that we talk about the same issue at the moment :)
the thread started with the underexposure 1600-3200 horizontal line that changes with shutter speeds..
i focus only on this problem. did YOU mean this problem?
 
roei z said:
i think that some people with different screens might notice the banding more than others (might be a bit more brightness and it turns a lot more noticeable)
Click to expand...

Regarding the original banding issue, I am able to see it on 3 different monitor setups. Most noticeably on my Sony 17" TFTs, but, also, on a ViewSonic 27" and a Panasonic 42". And this MacBook I'm writing from, so 4 monitor setups.

Does anyone recall how long it took Panasonic to release the second batch of GH1s?
 
It's not banding folks!!! Just a case of bad filmaking if you ask me...lol

Let's use film for example....garbage in....garbage out. It has its own quirky issues like anything else. What the heck are we all focusing on? Ha ha
 
Ian-T said:
It's not banding folks!!!
Click to expand...

Of course it's not. It's Panasonic's built-in anamorphic flare effect. No light source needed... ho, ho, ho.

Really, if it's only at ISO 1600 and above it shouldn't be too big of a problem for most shooters. And if it's a unit to unit problem, just return the sour one immediately for a replacement.
 
Update:

Got my hands on a third body today (this time one from a 14-140 kit, as opposed to the 2 body onlys I've tried so far) and the banding was still evident in high ISOs at poor lighting.

3rd times not a charm, I guess.
 
Isaac... that's too logical.... People want high isos, no noise, and miraculous intervention from God himself.... Do we not see this same kind of negative attributes in film? Personally i'd just be happy to get an exposure if I were shooting under such conditions.... People will never be happy.
 
Isaac_Brody said:
Here's the problem:



:)

Here's the solution:

Lower ISO's and proper lighting.
Click to expand...


I agree with the ISO, but the argument "use proper lighting" is just wrong. It's like saying that movies like Fight Club, The Social Network, Shutter Island etc. don't use proper lighting. They would all have tons of banding if shot on a GH1, because they have hight ratios between the key and the fill. The only way to really avoid banding is to light flat and even. This is artistically very limiting, and not a real solution.
 
No, it's possible to actually light for high key to fill ratios. But if you think the only way to achieve this is to shoot at 3200 iso and only use a 60 watt bulb as key then that's the issue. GH1/2 work fine for high key to fill ratios. What I'm suggesting is people need to shoot actual lit scenarios to show that this is an issue instead of just pointing it at walls at 3200 iso and underexposing. I haven't seen one properly lit shot where someone had a key light on a subject and no fill to show this is an issue.

All the examples you suggested were controlled scenarios, and the film stocks and Red camera weren't shot at 3200 iso, they were probably rated somewhere in the 320 - 640 asa range. That's a pretty difference to 3200 iso.
 
Here it is: I posted this a while ago. Left side is properly exposed, right side shows colored banding, which becomes very apparent in the moving image. I will post a clip within the next 15mins or so do better illustrate it....


gh13Streaking.jpg
 
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Here's the actual clip. It's from a camera test where we shot the 7D, GH13, 16mm and 35mm simultaneously... Exposed for the key (left side of her face). You will see vertical streaking all over her (especially on her neck and right arm).

http://cordvision.com/GH1_Streaking/00007.MTS


(Note: This was filmed with a GH13, not a GH2. The GH2 doesn't have that much vertical streaking anymore as far as I can tell from clips I saw online)
 
cordvision said:
I agree with the ISO, but the argument "use proper lighting" is just wrong. It's like saying that movies like Fight Club, The Social Network, Shutter Island etc. don't use proper lighting. They would all have tons of banding if shot on a GH1, because they have hight ratios between the key and the fill. The only way to really avoid banding is to light flat and even. This is artistically very limiting, and not a real solution.
Click to expand...

Movies like Fight Club, The Social Network, Shutter Island were not shot with an $800 cameras. These movies were made with Hollywood crews with the best equipment. You can dream all day long of making the next breakthrough film with a $800 camera. Probably won't happen. If you need better quality look at the Panasonic AF100. Very affordable. Here is a trailer of a independent movie shot with the AF100:
http://vimeo.com/17638057
 
cordvision said:
Here's the actual clip. It's from a camera test where we shot the 7D, GH13, 16mm and 35mm simultaneously... Exposed for the key (left side of her face). You will see vertical streaking all over her (especially on her neck and right arm).

http://cordvision.com/GH1_Streaking/00007.MTS


(Note: This was filmed with a GH13, not a GH2. The GH2 doesn't have that much vertical streaking anymore as far as I can tell from clips I saw online)
Click to expand...


I think I all ready asked this in another thread, but I can't seem to remember... What iso was this shot at?
 
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