anything over 80 ire orange?

L

loyd_christmas

Active member
well let me start by saying thanks for the incredible amount of knowledge I have gained from this site, its so good you could charge for it . So I just finished shooting something with my dvx 100 and I have a slight problem anything that hit 80 ire started to go orange on me .What I could not understand was when I closed the iris a bit to get the hot spots under 80 the orange would go away.I was shooting in a room with mixed lighting [a big window letting in a lot of sun light and a couple Arri 650s with ctb gels on them] I dont know if that would be a factor or not . has anybody else had this problem? any help would be much appreciated
 
Re: anything over 80 ire orange?

I am not at all the expert on this one (as I'm sure Barry will jump in on this one) but I wonder with the mix of lighting (color tempature) what kind of problems this can cause?

Is it possible the hot spot is reading 3200K (from mixed lighting) and you are balanced at 5600K (or the other way :P)

What about your WB? I'm just thinking outloud here.
 
Re: anything over 80 ire orange?

You have posed quite a conundrum, something I've never encountered. I'd actually be interested in seeing what Michael has to say about it!

It doesn't sound like you really had mixed lighting at all, did you? Sounds like everything was calibrated to daylight (daylight in the window, and tungsten lights gelled to be daylight-compatible). And if you had the white balance off, things would tend to go blue, not orange, right? Assuming that you had balanced for daylight, there should be no problem, and if you had balanced for tungsten, then all your lights would look blue, so I don't see where that could be the source of the problem...
 
Re: anything over 80 ire orange?

Kind of what I was thinking too (I'm still learning these technical thangs). I was thinking of the WB possibly being balanced at 3200K ? I guess the CTB would balance everything out right?

Need some stills here!
 
Re: anything over 80 ire orange?

If the WB was at 3200, then all the lights would look blue.

If the WB was at 5600 and the lights had no gel on them, then they'd go orange, but that's the opposite of the stated case here. Plus the connection between above-80=orange, below=80=white is just puzzling.
 
Re: anything over 80 ire orange?

I wont be able to get any stills up until tomorrow , my wb was set at 5600 .Im thinking maybe it had to do with the diffrent light sources because I just turned the camera on with just sun light  and now the problem is gone . Im going to try to shoot under the same conditions [ctb gels and sunlight] again tomorrow and let you guys know what happens
 
Re: anything over 80 ire orange?

I was scanning through the tape last night when I realized that there is no footage with orange tint on it because we just kept everything under 80 ire DUH. I havent had a chance to try the same lighting set up again ,hopefully tomorow .I will post pics if it happens again
thanks
 
Re: anything over 80 ire orange?

ok.. i think i know what loyd_christmas is referring to. when you shoot in a mixed light environment (artificial / daylight) it appeared to me more than once (and today again) that the tint of the picture changes dramatically according to the exposure. when it gets over-exposed, the over all tone tends to go orange, as if the artificial (aka tungsten) light has suddenly more influence.
it's quite logic that exposure will influence the way colors appear in the picture, but is this specific behavior normal too?... can't say.
 
Re: anything over 80 ire orange?

all tungsten sources had 5600 ctb gels on them though , so I really didnt have a mixed light source . I think my head is about to explode
 
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