temperature related color shift pink to green

greggyb

greggyb

Member
I am shooting a doc in alaska. In cold temperatures, I have noticed a Significant color shift in recorded footage. The picture is very pink on the left shifting to green on the right. I am in Alaska now and I am on a slow connect. I'll pull some frames and post them ASAP. Is this "normal"? The specs say the operational minimun temp is 32 degrees, but we have been using sony HDV cameras as B cameras on this shoot and they are having no problems. Thanks for any help.
Greg:violent5:
 
Seems odd, but are you looking at that on the LCD, and that is what is giving you this impression or have you digitized your footage and you are looking at it on the computer display? It may be the LCD is not enjoying the cold. I am assuming that you have white balanced.

Best,

Jan
 
I guess if all else fails, you can color correct it in post, but that seems more like a hassle than anything. What temp is it when you shoot? is it below the 32 degree mark? If so, my only guess is that the ccd chip starts to weird out past that point, or something that controls the color shift.
 
We have had customers take the camera down to -67. The video that was recorded at the South Pole is fine, the LCD is the only thing that gets weird.

Let's see what greggy says in response to the question I raised this am, before we start assuming that, and of course spreading it as if it were fact , the HVX cannot shoot in the cold because the CCDs get wacky when cold. No they have been much colder and the camera has recorded flawlessy, so I think we just need to find out the response from the original poster. Let's get some frame grabs from his footage that shows this. And then let's analyze what the situation is.

Thanks,

Jan
 
Thanks for all responses. Yes, I have looked at the footage on non-camera moniters and it is pink to green. The temperatures have not been that cold, certainly nothing like -67. The problem seems to develop around 32 degrees and below. The lowest temperature I have used the camer in is probably around zero degrees fahrenheit. I think, given Jan's input, that I must have gotten a camera with something wacky. I will post stills ASAP. Thanks again,

Greg
 
framegrab of pink to green color shift

framegrab of pink to green color shift

Jan_Crittenden said:
We have had customers take the camera down to -67. The video that was recorded at the South Pole is fine, the LCD is the only thing that gets weird.

Let's see what greggy says in response to the question I raised this am, before we start assuming that, and of course spreading it as if it were fact , the HVX cannot shoot in the cold because the CCDs get wacky when cold. No they have been much colder and the camera has recorded flawlessy, so I think we just need to find out the response from the original poster. Let's get some frame grabs from his footage that shows this. And then let's analyze what the situation is.

Thanks,

Jan
Click to expand...

Here it is:

pinktogreen.jpg


There are other clips that I don't have access to at the moment that are even more pronounced.
 
temperature related pink to green color shift

temperature related pink to green color shift

I posted this on the Technical section of the site as well. Here is the original text from that post:

I am shooting a doc in alaska. In cold temperatures, I have noticed a Significant color shift in recorded footage. The picture is very pink on the left shifting to green on the right. I am in Alaska now and I am on a slow connect. I'll pull some frames and post them ASAP. Is this "normal"? The specs say the operational minimun temp is 32 degrees, but we have been using sony HDV cameras as B cameras on this shoot and they are having no problems. Thanks for any help.

pinktogreen.jpg
 
Is this always on the left side of the image or does it vary? I have seen something like this but only in darker areas that have some red in the murky blacks.. and even then it comes off as more of a red cast around the noise...
 
Perfect response Jan. I guess that's why everyone likes you so much. I'm a newbie and I already like you. ;)
 
Funny, the camera in my phone shows the same problem, but more or less in any circumstance :-/ Sorry, can't be of any further assistance.
 
Greg,

To me it looks like a shading problem. I would take my camera into the LA service center on Cahuenga and have them take a look at it, because that is just not anything like what I have seen the camera do in cold weather.

Best,

Jan
 
Is this only visible on snow landscapes. Did you have a pol filter srewed on. At what time of the day has this been taken? Full blue sky or some clouds?
 
Yeah, for an "effect" that looks VERY similar to this, try shooting through an airplane window with a polarizer filter on.
 
Doesn't the manual say you need to re-black ballance in extreme temperatures? Have a look at page 41.' Adjust the black ballance ...if the temperature changes greatly.'
Good luck!
Sam
 
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