Summer Start

by VonSchnauzer

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

Take the 2-minute tour ×
Photography Stack Exchange is a question and answer site for professional, enthusiast and amateur photographers. It's 100% free, no registration required.

I occasionally take panoramic city photos and I've noticed that certain sections of the cities have a lot of different coloured lights.

What causes these different lights? Some of these appear to be 'coloured' lights (the green and red for example) but there's a lot of purple and orange and white lights which 'look' white when you view them with the naked eye.

I've previously had issues like this and I've found that correcting using white balancing works wonders, however, I believe all these lights are of different temperatures so I cannot balance them all.

Is there any way to fix this?

Below is a snip of a picture from one of the shots:

Problems

share|improve this question

4 Answers 4

up vote 6 down vote accepted

The different colors are caused by different chemicals in the lights. The bright orange ones are sodium vapor. Actually, there are two types of sodium vapor lights, with different colors. The blue/purple are mercury-vapor lights. The green lights may be ordinary florescent lights. The light yellow are probably tungsten, perhaps from car headlights.

You are asking a philosophical question: which is correct? You have to pick one, so that you can correct the color temperature in post-processing. There is no answer. Its trivial to correct one of the types, but I know of no way to correct a collection such as this.

You could try to desaturate the photo, or even push it all the way to black and white.

share|improve this answer
    
Ok, I'm not really trying to ask which one is correct. I already know which colour temperatures i like, so that's not the issue, the issue is getting the other ones to match during the shot or in post processing if at all possible. –  NULLZ Mar 9 '13 at 21:57

Basically, your question comes down to understanding light and the way the human eye and the human brain do colour corrections automatically, versus the way the electronic parts of your camera record it, as Pat and Staale both pointed out.

The technical part of colour temperature versus camera sensors versus the sensor quality versus lens quality and all the other variables that ultimately give the end result is a completely different story.

To take your question into a different realm:

What would happen if you would try to give 4 individuals from - let´s say - Ghana, Texas, Finland and Marocco, shot in exactly the same natural light, the same skin colour?

http://www.ted.com/talks/beau_lotto_optical_illusions_show_how_we_see.html gives some really nice insight in the matter...

share|improve this answer

i think it's better that you correct it zone by zone.because there are different color and kelvins it isn't possible to correct them at once.
but i think it isn't bad to have different color in one panoramic shot of city and it's attractive but you should try to improvement your work.

share|improve this answer

What Pat said, basically. I might add that your eyes and brains are fiendishly good at autocorrecting for this kind of light-colour variation, which means that you basically don't notice that it is there in real life. The camera on the other hand records the light at is is, not as it "ought to be".

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.