color reproduction

[Dennis Guskov]

For some reason green shows up as blue. Not a big deal in this case, but wouldn't you say it's rather curious?

As I understand, that could happen with film also:

On the Green Hornet Kodak 5219 made the "Green Hornet's" green jacket look blue, and 5229 made the jacket look green, so I chose 5229 because it saw the world closer to what it really was, the RED MX is the same

from this thread: [http://www.reduser.net/forum/showpost.php?p=686808&postcount=26]

So is that a normal anomaly, if that makes sense, that the eyes see one thing, but the camera another?

I grabbed my Canon 500D and took a picture to see if it saw differently. Here it is. Still not as green as by the eye, but a lot greener than R1M (left:RED;right:500D)

 

[Richard Foster]

There are so many factors in color reproduction and no perfect color reproduction system. Different sensors and different film stocks reproduce different colors differently. In addition different dyes and paints have different responses to both the visible and invisible bands of the spectrum which can affect how the sensor or film "sees" the color. Some clothing dyes almost fluoresce under certain light sources. The only real solution if critical color reproduction is required is to test. Sometimes IR and UV filters can help. Sometimes you can correct in color grading. Shooting a test is the best option.

 

[Graeme Nattress]

Dennis, want to send me an r3d snapshot? graeme at red dot com.

Graeme

 

[David Mullen ASC]

My first feature in 1992 was shot on 35mm Agfa, which was known for having good green reproduction -- it was a scene in a shack constructed from green fiberglass corrugated sheets, surrounded by green bushes, and the characters were wearing green T-shirts. Got the workprint back and everything was green except the T-shirts, which were blue!

Some teal / cyan colors basically "crossover" from green to blue because the system or film stock can't decide what color they are.

In the sample above, I wonder if it was shot under fluorescent lighting where pulling the green out of the lights also pulled it out of the shirt?

 

[joshua csehak]

I've seen this before too, and I'm really curious about what's causing it. You can see it in the Vegas clip here:

http://reduser.net/forum/showthread.php?t=49940

And I've definitely seen it in stoplights with other digital cameras, like the 7D.

 

[Dj Joofa]

So is that a normal anomaly, if that makes sense, that the eyes see one thing, but the camera another?

Yes, it is pretty normal, and is one measure of the goodness of color reproduction from a sensor. That happens because sensor and human visual space are not aligned. However, I'm not saying that the issue in your images is necessarily because of this fact. There could be other factors also.

Joofa

 

[Dennis Guskov]

I wonder if it was shot under fluorescent lighting?

nope, tungsten, all around...
in the example here: Dedolight, another location: Lowel Rifas with same result

perhaps it's the fabric that reflects the light somehow differently that the eye picks up but the sensor for whatever reason doesn't... so I guess that is a normal anomaly, considering two major DPs attest to it but that's with film. Ever seen that with digital cameras?

 

[Rob Ruffo]

IR contamination? How hot (temperature) was it on set? Looks like synthetic fabric - those will IR contaminate in a hurry.

 

[Dennis Guskov]

usually around 20-26c... quite normal temp I'd say