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05-19-2008, 08:16 AM   #1
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Why is it yellow?

I take pictures at my model helicopter club....
I used to use a Fujifilm S6500FD call well and good, 10 times zoom...

So I bought a Pentax K100D super, love it!
So I took it to the club and snapped away....
got home and the pictures of the club hall are yellow!

The club hall is lit with florecent tubes... is that why?
The camera is set to full auto, because Im a newbee at this....

Photos of the helicopters on the floor near me are ok and true colour.
does the K100D not self adjust for the tubes?
Is it me?
can you help me?

05-19-2008, 08:19 AM   #2
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post some examples so we can see...best way to solve the problem is to see it.

Jason
05-19-2008, 08:33 AM   #3
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you have to either adjust your white balance before the shoot

or post process the white balance after, altho this is best done in RAW as you can get better colour accuracy.
05-19-2008, 08:38 AM   #4
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There's 3 different settings for fluorescent light. Try setting it on auto, or experiment with the different WB settings.

The best way is to shoot RAW and change white balance on your computer.

05-19-2008, 09:14 AM   #5
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Right here is one of the images:



The camera was set to auto on everything, so why is the fuji ok but the Pentax not?

I shoot in JPEG format, as most of the pictures are for the club website...

By the way the walls should be WHITE!

Last edited by PentaxPZ; 05-19-2008 at 09:15 AM. Reason: missed bits out
05-19-2008, 09:38 AM   #6
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QuoteOriginally posted by PentaxPZ Quote
Right here is one of the images:



The camera was set to auto on everything, so why is the fuji ok but the Pentax not?

I shoot in JPEG format, as most of the pictures are for the club website...

By the way the walls should be WHITE!
In a room like that set the white balance to Tungsten, take the picture then preview it. I find most indoor shots like that Tungsten works best on the K100D Super.
05-19-2008, 09:49 AM   #7
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QuoteOriginally posted by PentaxPZ Quote
Right here is one of the images:

The camera was set to auto on everything, so why is the fuji ok but the Pentax not?

I shoot in JPEG format, as most of the pictures are for the club website...

By the way the walls should be WHITE!
Actually, based on the image it appears the walls are technically off-white (cream colored) based on the fact that the trim around the windows and the white dove on the poster are supposed to be white. Still, in any case, you are correct about the fact this image is way too yellow.

This is a perfect illustration of why sometimes it's a good idea to use RAW or use filtered flash to color balance the light. This gym clearly has mixed lighting with some minimal sunlight coming through the windows, the florescent lights on the wall and what seems to be incandescent lights overhead.

You probably couldn't have asked for a more difficult mixed-lighting situation.

Anyway, since you shot this in JPEG you can try to color balance the image with blue. The attached correction was done in Photoshop using the "Photo filter" tool and the blue color in about 10 seconds.

Last edited by JJJPhoto; 09-01-2008 at 04:57 AM.
05-19-2008, 09:49 AM   #8
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QuoteOriginally posted by PentaxPZ Quote
...so why is the fuji ok but the Pentax not?
I can at least answer that part... Some cameras are just better than others when it comes to auto white balance. Pentax usually does a good job, though. I'm surprised by that shot. All cameras struggle in incandescent light, though.

05-19-2008, 10:19 AM   #9
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Indoor white balance sucks on pentax. Shoot raw and fix it on import. (even auto on import usually does a good job.)
05-19-2008, 10:24 AM   #10
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I find that the setting I use in my custom white balance, works in about 99% of indoor lighting conditions regardless of lighting type. If I am shooting away from natural light sans flash, I just select custom and be done with it. Sure one can shoot raw, but for casual and quick shots JPG and the custom WB setting are just fine.
05-19-2008, 04:07 PM   #11
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I have found that typically the camera will pick from one of its WB presets when in AWB.

From the EXIF of your photo, it seems like it decided to pick daylight as the WB.

Here is my guess as to what happened: The sky is visible outside the building, and this fooled the AWB into thinking it was daylight.

In the future, I suggest doing one of two things (and of the two, I strongly reccommend the first):
1) Always shoot RAW regardless of the intended destination. The ability to shoot RAW is one of the greatest advantages of a high-end camera. RAW allows you to correct a lot of minor errors in a shot (especially WB errors) with ease.
2) Don't use AWB if shooting pure JPEG.
05-19-2008, 05:23 PM   #12
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i agree with user440, I'm amazed at how good custom white balance can be compared to AWB

or in those kind of lighting, tungsten also works out fine
05-19-2008, 07:13 PM   #13
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That bright light directly in the frame is what threw caused the image to be so underexposed. The underexposure caused an even greater shift in color balance. (the blue channel looks so clipped in the shadows, there's barely even any blue left in the image at all.) It's mixed lighting, so those bright lights on the wall are going to dominate the Auto White Balance, even though other color temp lights are in the scene as well.

Last edited by augustmoon; 05-19-2008 at 07:27 PM.
05-19-2008, 08:27 PM   #14
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I use custom wb for all of my indoor shots and it's quite good.
05-20-2008, 12:33 PM   #15
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A couple of possibilities I'd guess at since the exif is not intact on that image.


1) you dind't have the white balance set to what you thought you did.

2) The flourescents are "warm" flourescents (which the auto WB doesn't deal with as nicely as regular incandescent bulbs, and it sucks at that if you want your pics to have white whites).

3) There are more than jsut flourescents in the room. Since it looks big and gymnasium like, they may be sodium vapor lamps rather than flourescents. This will aggrevate Auto WB and be wrong for tungsten.

4) improper exposure is exagerating it.

5) You have multiple types of light, which most auto WB fails at horribly.

It is however, recoerable, even in JPG.

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