6D geen colour cast in indoor shots

[micha_goldfine1]

<p>Hi<br /> I recently took some indoor shots inside my office and noticed that I get various green shades. Not sure if it's a hardware issue or simply the camera's AWB gets confused when there are different light sources (fluorescent and natural light).<br /> see samples<br /><br /><br>

<img src="http://www.migo.com.au/img/untitled-5.jpg" alt="" width="800" height="533" /><br>

<img src="http://www.migo.com.au/img/untitled-6.jpg" alt="" width="800" height="533" /></p>

[devon_mccarroll]

Fluorescent lighting will come out green in images. Mixed lighting can be difficult to manage, but start by setting your white balance to

fluorescent and see how it does. If you're shooting in RAW, you should be able to correct some of it in post after that.

[micha_goldfine1]

<p>Thanks Devon<br>

I have taken hundreds of photos in this office before using the 7D and never saw any green cast colours. I also find that the 6D will shot inconsistent colour temperatures when shooting the same scene in burst mode. some images will be warm (red) and some cold (blue/ white). </p>

[tom_mann1]

Fluorescent lights turn on and off at twice the mains frequency, so if a relatively short (say, under 1/125th of a sec)

exposure occurs at the peak of current through the tube, you will get more of a green cast than if the exposure occurs at

the minimum. This also is a very common problem when shooting sports at night under Hg, Na and other types of high

power lights.

 

A work around is to shoot at slower speeds. At least then, you'll get consistency, but if you go too slow, you might get

motion blur.

 

Tom M

[Marcus Ian]

<p>It's pretty typical of AWB in this lighting. If it's bothering you, simply set the WB to one setting or another, and it'll stay set. </p>

<p> Of course, as has been pointed out, the lighting changes, so fast SSs may capture varying light intensity - which will have a result in color. This is what is causing the camera to change it's AWB setting on each subsequent frame in the burst. I think it's very possible your 7D was set to a specific WB, so didn't think about each exposure and assign a WB - and therefore it didn't vary. </p>

<p>In AWB, changing light changes temp, as does a shifted composition, or even a different FL. If it's bothering you simply set it and forget it. If you shoot with RAWS, correction (if necessary) is simple. </p>

[phule]

<p>[[6D will shot inconsistent colour temperatures when shooting the same scene in burst mode. some images will be warm (red) and some cold (blue/ white).]]<br>

<br />Any camera with the exact same settings will capture the same variance. The answer is to lower your shutter speed below the flickering threshold. </p>

[micha_goldfine1]

<p>Thanks guys<br>

I should have mentioned that I used a Flash on my 7D and maybe that cancelled the fluorescent effect. anyhow, I will experiment with the 6D and get the setting right.<br>

Cheers and marry Christmas. </p>

[igord]

<p>Was it in the evening? If yes camera adds green to balance outdoor evening magenta cast.</p>

[Mark Keefer]

<p>You are shooting under two different temperatures of light. The camera is going to choose one. You have the indoor lights at one temperature and the outdoor light coming into the window. In the first photo it looked like the camera was setting the white balance for the outdoor light, but in the areas where outdoor light was not hitting it was illuminated by another temperature of light from the ceiling and bounced light off many objects and floor of different colors in the room.</p>

<p>You can correct this with a little effort in Lightroom with an adjustment brush using the Temp Brush. Simply select the Temp Brush and go over the area that is green and adjust the brush temp setting until the hue matched the outdoor lit wall.</p>

<p>The best solution is to get the proper exposure first using lighting equipment, flash set at a high enough power level that it will over power the ceiling light a little.</p>

<p>Typical sunny day outdoor light is around 5200-5400K, shade 7100-8000K, a Canon Speedlight or pop-up flash also shoots around 5200K. Another tip for window shots is to try to get the indoor light and outdoor light balanced at close to the same exposure level so both objects indoors and outdoors will have similar exposure and come out nicely in your shot, of course this is if that is the type of shot you are going for.</p>

<p>If the outdoor light is from an overcast day, the light temperature outside will be around 6000K,<br /> Florescent light is around 6200-63000K. There are also reflective surfaces coming into play, light bouncing off different colors will effect your image.</p>

<p>Outdoor light changes with the time of day, time of year and weather. Bring into play different indoor lights, mixed bulb temperatures of ceiling lights depending on when and where the office purchased their last box of bulbs. Soft warm bulbs or harsh industrial lights.</p>

<p>Shooting under different colored light temperatures can be challenging and sometimes be used creatively. This is one of the reason professional photographers using their own lighting get much better results than uncle Bob who has a nice camera but not a lot of lighting gear when he was shooting a family wedding.</p>

<p>Next time try a little flash and of course there is correcting in post processing on the computer. Lightroom has some real nice tools for this.</p>

<p>Why the photos from the 7D did not look as bad as these 6D shots may have just been a matter of different window light. Don't worry, your 6D is not malfunctioning and there is no inherent design flaw in the 6D system.</p>