White Balance values

[edwardkaraa]

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I didn't pay attention to this earlier, probably because I was shooting mostly on AWB, but the camera daylight balance values in ACR come up as 6900K/-8 with the embedded profile (which is the better profile by far).

 

With adobe standard profile, the values are more mainstream with 5300K/+6.

 

I was having some difficulties obtaining a pleasant white balance setting with the SL, and now I understand why. I was playing with values around 5000K to 5500K, which are way too bluish.

 

I wonder why are the K values so high. Any clues?

[CiraCrowell]

 

I was having some difficulties obtaining a pleasant white balance setting with the SL, and now I understand why. I was playing with values around 5000K to 5500K, which are way too bluish.

 

 

I've found the same thing on the SL, especially when comparing 24-90 images to 28-90 R lens images made at the same time.  The SL 24-90 lens has a very cool cast which renders flat. The R 28-90 has a nice range of cool to warm tones and structure.  Is the bluishness/flatness a signature of the SL lens?

[edwardkaraa]

I don't think it's the lens, because color casts are very subtle, not over 200 K in my experience. It's the only camera I have used so far with a daylight white value of 6900 K. Not sure if it's just a random value or the sensor output is exceedingly cool.

[ramarren]

The color temperature set by the camera is driven by the main sensor and the sensor on the body (just like the aperture for an R lens is estimated by the sensor on the body coupled with the main sensor). I found I was partially covering the external body sensor with my hand and causing the aperture to vary more than it ought to; it could also be affecting the default color temperature. 

 

BTW, I found the estimated aperture on the M-P was affected the same way ... and maybe the color temperature there as well. I've since learned to hold both cameras slightly differently to minimize how it affects the estimated aperture. 

[jrp]

Diglloyd reports that there is a bug in Adobe's white balance for the SL. I don't know what

/ whether it is, but I am not ecstatic about the colours coming out of the SL. For example, grey skies often come out blue, if the rest of the scene is natural. 

[su25]

I find issues with LR interpretation of embedded NR and WB values. When I compare LR images to jpg (DNG+jpg), skin tones and NR of jpgs are much better; those from LR make the skin smooth/plastic-like, no skin texture (maybe due to luminance NR ??). Btw this is with 90 mm summicron on SL. With 24-90 mm SL lens, WB is still an issue, NR is not too much of an issue.