Photo macOS RAW Developer bug

[ronnyb]

When using Sony .ARW files, the white balance slider is incorrectly displaying degrees Kelvin; it shows cooler temperatures having lower Kelvin values than warmer temperatures.

This is backwards. Lower temperatures are warmer/yellower than higher temperatures, which are bluer, colder. 
Thanks for taking a L👀k at this and all you do!

[Ron P.]

In all my editing apps, cooler temp is lower Kelvin. It's logical. Cooler=cold, which is almost always a lower Kelvin value. 32 deg F is colder than 80 deg F right? Notice the numbers, colder is less than the hotter. The sun does not look blue, it appears red or a orange, fire is more red.

[Ron P.]

Are you not seeing this in AP? Moving the slider to the Right increases the Kelvin value, making the image warmer. Moving it to the Left, decreases the Kelvin value, making the image cooler.

For demo I show LR and then AP.

[markw]

From a pure physics point of view yes hotter (higher energy) objects produce more blue light, cooler ones more red.
For example new young hot stars tend to appear blue, older dying stars tend to be red and cooler.
But in the world of graphics and lighting the emotional perception of blue being cooler and red being hotter is used.

[ronnyb]

We don’t need to get into astrophysics or anything other than your camera’s white balance setting, or your light’s color temperature. It’s ALWAYS warmer light is lower degrees kelvin, and cooler lights are higher degrees. We are not running a physics simulation, I just want my RAW developer sliders to match my light’s and cameras color temperature settings… 

Maybe a preference/Setting for the Raw developer ?

[carl123]

20 hours ago, ronnyb said:

When using Sony .ARW files, the white balance slider is incorrectly displaying degrees Kelvin; it shows cooler temperatures having lower Kelvin values than warmer temperatures.

This is backwards. Lower temperatures are warmer/yellower than higher temperatures, which are bluer, colder. 
Thanks for taking a L👀k at this and all you do!

Explained why, in this thread

 

[ronnyb]

It’s funny, I thought we were using a photo RAW Developer to edit COLOR temperature, not a “physics simulator” adding heat temperature to an image….

In the photo context, lower K = warmer COLOR temp and higher K = cooler COLOR temp. Its called COLOR temperature not energy or heat temperature for a reason.

@Ron P. When I took astronomy courses in college back in the day, we learned the stars that burn (HEAT) cooler in Kelvin temp have LOWER color temperatures (warm yellowish color tones) than stars that burn HOTTER in temperature and emit cool color tones (blueish whites).

This is backwards in Affinity. No need to reinvent the wheel….
 

[Murfee]

21 hours ago, ronnyb said:

This is backwards in Affinity. No need to reinvent the wheel….

They are not reinventing the wheel, as far as I am aware all RAW developers follow this standard. 

Can you please show us any that are using the way you are suggesting.

[ronnyb]

My Godox studio lights have a color temperature range I can set, from 2700° which is very warm/yellowish white to 9000° which is cold, blueish white...

[Murfee]

Lights yes I would expect that.
 

I asked for a raw developer.

[Ron P.]

I just checked all software that I have, that are capable of RAW development. All of them use the same standard. Higher Kelvin=Warmer, Lower Kelvin=Cooler.

• Photo Editors
  • Affinity Photo
  • LightRoom
  • Corel Paintshop Pro
  • Corel Photo Paint
  • Canon Digital Photo Pro
• Video Editors
  • DaVinci Resolve
  • Corel VideoStudio

[Murfee]

1 minute ago, Ron P. said:

I just checked all software that I have, that are capable of RAW development. All of them use the same standard. Higher Kelvin=Warmer, Lower Kelvin=Cooler.

Exactly, I can add

• Capture One
• Nikon Studio
• Raw Power

i am just curious what Software RonnyB is using that has prompted the request to go against industry standard, and accusations of reinventing the wheel

[Chris B]

Hi ronnyb,

I certainly appreciate your comments, however, we are happy with the way this is working and it does match other apps. I'll add Photoshop to the mix of the above listed apps that display it this way.