5D and the colour red

andrew00

Well-known member
Hey,

I'm no tech guy, so maybe those who understand these things can weigh in please, but I feel the 5d's relationship with the colour red is weird.

Initially I thought that, like a lot of these digital cameras, the 5d was a bit too sensitive to red, easily fixed in post by just removing it a touch.

But I'm seeing some differences from shot to shot, where the lighting was consistent, as I move to an image with more or less of the frame filled with red objects.

For example I'm looking at a closeup and the camera was on a slider so move from where the actor was on the left to move in the middle as the shot goes on.

Behind him there was a red lametta (foil) curtain, all shiny and the like. When he's on the left and the red curtain takes up a good amount of space, the red hue is more apparent than when he is in the middle, and so there is less of the red curtain in shot.

I thought that these cameras, although seeing red a bit wonky, at least saw it consistently, but I'm having to add a bit more red colour removal on those shots when he is to the left aka those with a bit more of a red hue.

Can anyone explain this and what one should do about it etc?

Thankfully I have Mathias's TMTS FCP plug in that has a great colour balancer I can just remove -5 red or whatever to make things consistent, but still.
 
I see this all the time Andrew with colors across the spectrum regardless of camera.
As you move the focal plane the length of the wavelength representing color vibrating off the object changes and effects how the camera perceives color, notably in saturation. So you'll see different hues at different angles.

Usually it's a subtle difference, but texture and lighting all play a role.
 
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