Cyan colour cast is IN CAMERA!

[chris26]

This refers to the 400D. As Rene and a few others will note I have been struggling with the colour cast in my prints that were not so clear to see on screen, after profiling that is. I went back again to some of my DNG files and noticed the strangest thing when examining sample of deep shadows against the shade and deep shadowy areas on water that were in sunlight(if this makes sense) all these sample have excessive amounts of Blue and this is in camera! Look carefully at the centre of this tree up a bit. Look to the right top in the leaves and down left of the tree.

I have a swan on water and in parts of the water it is blue while the lighter parts of the water are evenly balanced. Is this normal?

[chris26]

here is the image again. i followed the on site Rules for the last image and that was a pointless exercise. It turned out useless. So here is the image larger.

[chris26]

sorry that did not work either - oh well give it a miss - goodnight

[René Damkot]

Try putting up a link to a larger image, hosted elsewhere perhaps?
However, by the description; you have a blue cast in the shadows?

Seems like that's simply because those areas weren't lit by the sun, but by the blue of the sky?

Same thing turns snow in the shade blue on the "Switzerland holiday images". ;)

[poloman]

Yes shadows really are blue.
Try pushing your white balance a little warmer and see if that helps.

[griptape]

Your easiest option would be to either shoot in RAW and adjust the white balance afterwards, or set your white balance manually if shooting jpeg is the only option. Canon's auto white balance is almost always too cool.

[chris26]

Sorry, I do not have anywhere alse to stick this photo. The comment about the snow etc, I did not know this. I have never experienced this sort of thing before. It turns blue because the camera is told that the white balance is sunny, meaning loads of red and therefore adding blue? But exaggerated because of he white _I don't know I have no clue whatsoever. So why would this happen in the shadows it makes absolutley no sense to me at all.


Most of the shadow areas are good and evenly balanced. It was a cavern in the middle of the tree that is pouring out blue like a star wars lazer burst coming towards you, Also blue cloudiness on other parts of the image. Anyway this shot was taken in RAW and white balance was perfected with the eyedropper and a perfect neutral attained but blue remained. Fill light and all other adjustments train it down but this is unacceptable for the rest of the image. No I will use photoshop to banish it.

[Lowner]

Chris,

"So why would this happen in the shadows it makes absolutley no sense to me at all".


Think about it: The sun, big yellow thing, apart from being the main "character" light in our studio, makes everything it lights have a warm yellowish tinge, specially evening, when it goes to reddish.

The sky (apart from here in the UK), tends to be blue, in the absence of sun, as in shadow areas, everything gets a blue tinge. The bluer the sky, the bluer the shadow.

Its not really your camera at fault, although you might be able to tweak the WB in a certain direction for a certain shot. Rather it's just the way things are.

I generally don't bother to try to tune WB in camera unless it's "waaaaay" off, as in artificial lighting. I prefer to adjust the image in post-processing, simply because then I have time to examine every detail.

Richard

[tzalman]

I have been known, in cases like this, to do multiple RAW conversions using different WB's for the different light sources and then blend them like a pseudo HDR.

[chris26]

thanks for this.