Jump to content
Jon Pivko

RGB Lights with X & Y Coordinates?

Recommended Posts

The only RGB lights with CIE 1931 X and Y coordinate control that I can find are Arri Skypanels. Does anyone know of a different brand of light where you can dial in your color with this level of control?

Other lights seem to use an RGBw or similar model to control the color. From what I am reading there is less control there and no way to translate the data into something like X and Y or vice versa.

Also, is there a way to match an RGB light with only HSL controls using a Color Meter?

My goal is to augment natural light using a color meter and RGB lights, but not having luck trying to find lights with X and Y outside of Skypanels.

 

Thanks for your time.

Share this post


Link to post
Share on other sites

I think some of the Rosco DMG stuff has it, as do some models of Kino Flo LED.

Lack of an xy mode doesn't imply less control, nor does presence of an xy mode imply that two lights can easily be matched for camera.

The CIE 1976 xy chromaticity diagram represents colour as viewed by a human being. Two different spectrums may look the same to humans and would therefore be correctly represented at the same location on a CIE diagram. Two lights which use different LED emitters will produce two different spectrums which might appear the same to humans, and are thus validly called "the same colour."

Those two different spectrums might not look the same to a camera, however, with its different balance of sensitivities to red, green and blue light. Because of this, no colour control scheme can guarantee that any two lights will match on camera* and the only way to positively verify such a match is on a monitor. 

* The trivial exception to this is if both the lights involved have information about the varying sensitivites of different cameras. So far the only company to have done this is Kino-Flo and it is not clear exactly how this information is being used by the light. 

  • Like 2

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



  • Gamma Ray Digital Inc



    Wooden Camera



    The Original Slider



    Metropolis Post



    Broadcast Solutions Inc



    Media Blackout - Custom Cables and AKS



    Just Cinema Gear



    Tai Audio



    Serious Gear



    FJS International



    Visual Products



    Abel Cine



    Paralinx LLC



    CineLab



    New Pro Video - New and Used Equipment



    Glidecam



    Rig Wheels Passport



    Ritter Battery



    G-Force Grips


    Cinematography Books and Gear
×
×
  • Create New...