Blackmagic Forum

On the P6K, when using false color to monitor the exposure, do you turn on LUT (for example: BMD to Extended Video) in camera before turning on false color to set exposure or set expose first using false color and then turn on display LUT?

Ellory Yu wrote:On the P6K, when using false color to monitor the exposure, do you turn on LUT (for example: BMD to Extended Video) in camera before turning on false color to set exposure or set expose first using false color and then turn on display LUT?

Unless something has been changed in recent firmware, the viewing LUT has no impact on false color. What you see when false color is engaged is based on the camera's decode transfer function + gamut setting which the menu labels "dynamic range" with three options — Video, Extended Video, or Film. So if you keep a static image in front of the camera, you should see minor differences in false color when switching between those options, but you will see no difference in false color when switching between monitoring LUTs or even turning the monitoring LUT off entirely.

I'm on the latest firmware on the P6K. What you said is exactly what I thought too. But, why is this happening? In the images below, the top is the display without the extended video LUT. The middle is the false color that I had on while exposing for image #1. When I turn on the LUT, the image was "so hot or saturated" and horrible. Flipping back to False Color was as expected, nothing changed. So, what is going on here?

What "dynamic range" setting do you have on in the camera menu?

If you intend to view the image using the extended video LUT then the "dynamic range" should be set to "Film".

If you instead have the "dynamic range" setting at "Video" or "Extended Video", you should not apply that LUT to the display (nor in post) because the image is already transformed for display in both "Video" and "Extended Video".

Jamie LeJeune wrote:What "dynamic range" setting do you have on in the camera menu?

If you intend to view the image using the extended video LUT then the "dynamic range" should be set to "Film".

If you instead have the "dynamic range" setting at "Video" or "Extended Video", you should not apply that LUT to the display (nor in post) because the image is already transformed for display in both "Video" and "Extended Video".

Duh on me. I didn’t check the DR as I always use FILM. It was set to BRAW Extended Video already. Thanks for the help.