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Thread started 05 Dec 2014 (Friday) 19:23
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6D AWB has difficulty with fluorescent light

 
artyH
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Dec 05, 2014 19:23 |  #1

I just got my 6D and have been trying it out. It seems to work fine with my Canon 50F1.4 and the 24-105. However, auto white balance seems to struggle with mixed fluorescent lighting. Is it my imagination, or does the 60D do better with AWB?
I figured out how to set the custom white balance, but thought it curious. Perhaps it is my imagination?
This is with JPEGs and normal picture style.
Does AWB pose problems with the 60D and fluorescent lighting.




  
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mike_ripple
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Dec 05, 2014 19:31 |  #2

The problem with fluorescent is there is no consistency as far as white balance. If you buy fluorescent bulbs there are several different color temperatures with varying CRI, both which can affect light quality. I almost always shoot raw and adjust white balance in post processing. You can get similar results setting custom white balance within the camera. I've had both cameras and AWB can work ok in certain circumstances, setting a custom white balance almost always works better in challenging lighting.


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DwainRowe
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Post edited over 8 years ago by DwainRowe.
     
Dec 05, 2014 19:43 |  #3

Are you using the correct shutter speed to prevent catching fluorescent flicker? That is the most common error in poor white balance related to AWB or WB of any fashion with fluorescent lighting, not the color of the light, itself.


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CaliWalkabout
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Dec 05, 2014 20:10 |  #4

I've learned to always set a custom white balance when shooting a lot in artificial light.

Last summer I shot an event held in a bookstore. It felt like every other shot had a completely different color temperature. By the time I was finished processing the shots I had to conclude that there were at least three different temps in the room. Learned an important lesson that day, though I think if I'd known to set my custom WB I'd still have ended up tweaking a lot of the photos anyway. Thank goodness for RAW.


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John ­ from ­ PA
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Dec 05, 2014 20:34 |  #5

Go to http://johnbdigital.co​m …/fluorescent_li​ghting.php (external link) for a good explanation without getting too complex.




  
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gonzogolf
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Dec 05, 2014 20:44 |  #6

Fluorescent lights cycle, meaning they flicker and during that time there color and power fluctuations. If your shutter speed is slow enough to capture a fullcyvle its less noticable. But even dicounting that, fluorescent lights are often not full spectrum lights snd you cant balance a color that isnt there.




  
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artyH
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Dec 05, 2014 21:45 as a reply to  @ gonzogolf's post |  #7

Thanks for the feedback. I was having more difficulty with the 6D than my crops. The 6D seemed off, more than the 60D. Setting a custom white balance fixed the problem. I checked and the shots were at 1/50 or 1/125. I'll use 1/60 next time. Thanks for the advice.
I got so caught up in learning to use the new camera that I forgot about fluorescent flicker.
I just thought about color temperature, and the fluorescent setting in the camera didn't fix the problem.
The lighting is fluorescent in 3 rooms, but with variable color temperatures.




  
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gonzogolf
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Dec 05, 2014 21:50 |  #8

Keep in mind that fluorescent lights color shift as they age do expect little consistency gixture to fixture let alone room to room.




  
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GeoKras1989
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Dec 06, 2014 11:03 |  #9
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I have a 60D and a 6D. I think the AWB on both of them is for bright sunshine and flash. In any other light, I do custom WB. Shooting raw will also give you a lot more room to maneuver in post-processing.

It is my opinion, which I believe is shared by many, that shooting a dSLR in any jpg mode is roughly akin putting training wheels on a Ferrari Testarossa.


WARNING: I often dispense advice in fields I know little about!

  
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maverick75
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Dec 06, 2014 11:17 as a reply to  @ DwainRowe's post |  #10

Bingo,

There was a time when i couldn't use it since i was shooting a band and i needed the fastest shutter. Ended up with horrible green cast but it was surprisingly so easy to remove it by tweaking HSL levels in Photoshop. Also de-saturating it a bit helped.


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Dec 06, 2014 14:27 as a reply to  @ maverick75's post |  #11

Mixed lighting sources will be tricky. I shoot raw and use custom white balance in these situations and yes, sometimesw have to adjust afterwards. I just wish the 6D had a button on the back to set the white balance, I believe that Nikon offer this........


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artyH
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Dec 06, 2014 14:32 |  #12

It helped to set the shutter speed to 1/60, but it helped even more to set the picture mode to neutral. Standard was boosting contrast too much. I also find that I need to set exposure to +1/3, or I get under exposure.
This has to be the camera, since I had to do this with all my lenses that I have tried on the 6D. The 50F1.4 needed a boost in exposure on the 6D, but overexposed on my crop bodies. I have read that many people have been routinely setting exposure compensation to +2/3 on the 6D.
Thanks for all of your help. I may pick up some new SD cards and shoot Raw + JPEG.




  
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GeoKras1989
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Dec 06, 2014 16:17 as a reply to  @ artyH's post |  #13
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If you are using DPP, raw + jpg is pointless. DPP reads the jpg settings (Picture Style) and applies them on import. The nice thing with raw is that you can change the Picture Style after the fact. I use Lightroom, but still set up my Picture Style like I want the finished product to be. LR ignores it, but I can see it on the LCD.


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GeoKras1989
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Dec 06, 2014 16:19 |  #14
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shocolite wrote in post #17316530 (external link)
Mixed lighting sources will be tricky. I shoot raw and use custom white balance in these situations and yes, sometimesw have to adjust afterwards. I just wish the 6D had a button on the back to set the white balance, I believe that Nikon offer this........

I put Custom WB on "MyMenus". That is the best you can do, I think.


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Sin ­ City ­ Stan
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Post edited over 8 years ago by Sin City Stan. (2 edits in all)
     
Dec 07, 2014 21:59 |  #15

gonzogolf wrote in post #17315038 (external link)
Fluorescent lights cycle, meaning they flicker and during that time there color and power fluctuations. If your shutter speed is slow enough to capture a fullcyvle its less noticable. But even dicounting that, fluorescent lights are often not full spectrum lights snd you cant balance a color that isnt there.


A quick note about fluorescent ficker. This is pretty much a none issue now whereas electronic ballasts operate around 20,000 Hz. There are not many old ballasts left out there. A quick visual que is most lamps 1 1/4" in diameter are operating at 60 Hz. Anything 1" and 5/8" diameter are Hi Freq. units. Also, you can sometimes see the Kelvin temperature on the lamp. A part number suffix of 35 or 3500 relates to 3500 K white balance. 30 or 3000 to 3000 K. and so on. Or forget about all of this and just shoot RAW. :-)


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6D AWB has difficulty with fluorescent light
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