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Old Jun 3, 2005, 9:38 AM   #1
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Hi Cal,

I've just taken 2 pix within seconds of each other, and notice the colour balance is different with both. Not sure if this qualifies, but seems strongly related to the challenge. Herewith the regular balence...

Caroline




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Old Jun 3, 2005, 9:39 AM   #2
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And herewith the wayward one. Not sure how this happened (others I took of the subject were the same as the first.)

style="BACKGROUND-COLOR: #000000"Caroline.

style="BACKGROUND-COLOR: #000000"


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Old Jun 3, 2005, 10:05 AM   #3
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I am not an authority on the subject but here is what I think happened. You had WB set to auto. In the first picture, there are lots of bright white clouds. The camera "saw" this and set the white balance for the clouds.

In the second shot, you changed position. The flower occupies more of the picture and fewer clouds show up. The camera set the WB based on the flower.

I don't know if auto WB looks at the entire image or if it is a "spot" function similar to spot metering and spot focus. I suspect the latter.

I think this is a really good example of why NOT to use auto WB. As Forest Gump says "It's like a box of chocolates. You never know what your're going to get!"

Cal Rasmussen
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Old Jun 3, 2005, 11:57 AM   #4
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Very interesting! Your explanation makes sense...

In fact I think I will run with the second flower because I like the slight colour weirdness, but in loads of cases I would much prefer the right colour balance:roll:.

In fact most of the time my camera seems amazingly good at this, even with mixed light sources...:?.

Congrats on being a mod - most appropriate!

All best wishes,

Caroline.




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Old Jun 5, 2005, 8:29 AM   #5
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i think cal is right here...another possibility, is that the sun was out in the second, and behind the clouds in the first...

very interesting comparison :-D
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