Auto White Balance Issues.

[Piero Sgarbi]

Hey everyone.

So, someone used our camera and had a bit of an issue using auto white balance.

Basically while shooting outside during daylight, if they used auto white balance, the Dragon would shift the Kelvin up to 12k (And of course it also shifted the tint accordingly) resulting in a well balanced image.

Now, when they brought the kelvin back to 5600, no matter how they shifted the tint, the colors resulted not to balance properly. Also, while using any software (Davinci, PPCC etc) you are basically not allowed to work with temperatures above 10k Kelvin.

Does anyone have had this issue before?

Check the SS attached.

 

[Stefan Scherperel]

Any way to upload larger images. Those are too small to see what is happening.

 

[Graeme Nattress]

You'll need to get me an R3D frame snapshot to look at so I can try to see what's going on.

Not all lights have a colour temperature. Strictly speaking only lights which are pure black body radiators and thus lie on the Plankian locus have a colour temperature. All other lights, whose colours like above or below the Plankian locus are said to have a "correlated colour temperature", which is the colour temperature they would be if we moved their white point along an iso-temp line until it touched the locus. The tint control is just that - it moves lights along the iso temp lines above and below the locus. For any real light source there's only going to be one combination of kelvin and tint that accurately describes the colour of the light and thus allow us to white balance it. Therefore if the light balances at around 12k, then there is no way moving the kelvin to 5600k and adjusting the tint will ever balance the image.

Graeme

 

[Bob Gundu]

Also make sure the OLPF setting is assigned to the right filter.

 

[Piero Sgarbi]

Also make sure the OLPF setting is assigned to the right filter.

Somehow (never messed with it) the OLPF was set to LLO..Thanks, would have never thought about that... Even after a factory reset it got set to LLO for some reason.

 

[TheBied]

Somehow (never messed with it) the OLPF was set to LLO..Thanks, would have never thought about that... Even after a factory reset it got set to LLO for some reason.

The user OLPF setting is preserved through firmware upgrades and factory resets.

 

[Jake Wilganowski]

Strikes again....

 

[Russ Fill]

Ive had similar looks with the Motion Mount and not setting it up with new builds etc etc...