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Here's an example of what I'm referring to:Thanks,
I am a bit confused however regarding setting the white balance based on Luminance of the faces?
Totally agree with this using an A900. :thumbs:I've done some recent experiments with adjusting the exposure relative to the ISO and found a distinct non-linearity below ISO 200. At middle gray WB gain was constant at all ISOs, but at near maximum saturation (ETTR) the red and blue channels dropped down noticeably relative to the green channel going from ISO 200 to 160. This means you will have some color shifts below ISO 200.
Also, headroom in the RAW ISO 100 files appears to be no greater than it is in the ISO 160 files. My conclusions are therefore that ISO 125 and 100 are really for getting flash sync to work with JPEGs, and if you are shooting RAW at ISO 160 then you should be alright if you make sure to set WB based on the luminance value of the subject's faces.
For better shadow detail ISO 320 works best on the A850. While that shouldn't be a studio issue, I still find that to be the optimal ISO for the A850 and I use it as my default even with controlled lighting. I personally feel comfortable using any ISO from 200 to 500; and while 200 is smoother than 320, some of that smoothness comes at the price of blotchier shadow detail, but if you are keeping within 2 1/2 stops of middle gray then I don't think you will have any issues in the shadows at those lower ISOs.
Yeah, I'm quite possibly the world's worse model. One the bright side, I can strike that pose over and over again.Tony, you don't look too happy about your results there... :ROTFL:
A trick I use is to shoot the colorchecker out of focus.Dave, in my experience, it does help to turn the noise reduction on when using the eyedropper.