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5 Messages

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252 Points

Wed, Apr 27, 2011 7:28 AM

Lightroom/Camera Raw: Color temperature below 2000K

Color temperature below 2000K. It would be extremely useful for infrared photography. By the way, Capture One already allows it.

12

Responses

4.5K Messages

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76.3K Points

9 years ago

You can also adjust temperature using the camera calibration section. In fact, I know of one person who prefers using RGB over temp/tint, and uses cam-cal exclusively for white balance adjustment.

One option: create infrared preset that has a cool bias to cam-cal, then go the rest of the way with the temp/tint sliders.

Note: presets lump the camera profile in with the shadow-tint/rgb sliders, but you can take the camera profile out using a text editor (then restart Lightroom), to have an rgb preset that will work with any profile.

Another option: create a DNG color profile for infrared.

5 Messages

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252 Points

9 years ago

I tried to use calibration controls, but didn't got results like in Capture One. Maybe I did something wrong. The same for profile. It worth to try again.
But the point is the color temperature is much more user-friendly control. And if we have temperature over 20,000K, why we can't get lower than 2000K? Defenitely this is artificial limitation.

4.5K Messages

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76.3K Points

I don't understand enough to know why there is any limit at all. Is there a 0K?

5 Messages

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252 Points

Yes. It's a temperature of the ideal black-body radiator, it can be 0K. The candle light is starting from ~1500 K, the dark red glow of the heated metal have temperature about 800 K.

4.5K Messages

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76.3K Points

Thanks Alex. NX2 also has very constrained temperature ranges - I never understood why one can not adjust "all the way" in both directions, whatever that would mean...

5 Messages

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252 Points

Rob, thanks for idea about acr profile. I've tried again and this time successfully. Results before and after: http://alex-krylov.ru/2011/05/05/ir-a...

But I still think the lower color temperature would be useful.

1 Message

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62 Points

9 years ago

Lightroom (and Photoshop) white balance color temperature can't go below 2000K, which is a major pain for IR photography (and for candlelight and low-power tungsten too). Other software can do this, why not Adobe's?

This reply was created from a merged topic originally titled
Please lower the white balance temperature limit below 2000K!.

12 Messages

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404 Points

9 years ago

Yes, candlelight cannot be done right in LR...

4.5K Messages

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76.3K Points

Actually, it can be done quite easily - see my first reply post up top.

Also, I've just made it "child's play" to edit color profiles for this purpose.

23 Messages

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758 Points

9 years ago

I think would be potentially useful to have a color temperature below 2000 and a tint below -150 for InfraRed Photography.

As for example.. in this step-by-step it suggests you minimize out the color temperature.
http://www.outbackphoto.com/CONTENT_2...

But this still makes you dependent on going B&W, though if it went lower on the scale and you were doing it for effect would it not be useful vs. being constrained to just B&W too or even if B&W useful?

200 Messages

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3.1K Points

9 years ago

Yes, a lot of the light sources that we photograph at night have extremely low color temperatures. Sodium vapor lights for example. If we could choose lower color temps we would be able to balance these lights in a way that we cannot do now.