I'm a newcomer to photography, and I'm developing a workflow for batch processing of images.
I am currently using a session photo of the ColorChecker to set the White Balance w/ the WB eyedropper in ACR. I have also used ColorChecker images (D50 and D65) for camera calibration using Bruce Fraser's method and the various scripts.
My question now is as follows. For the purpose of setting the tonality (exposure, shadows, brightness, contrast), is there ever a circumstance where it would make sense to develop a session-specific tonality preset based on matching the ColorChecker grayscale patches to their Adobe RGB reference values (243/201/161/122/85/53), or should the tonal parameters always be set on an image-by-image basis.
I'm photographing paintings, and each of my sessions contains different paintings - some lighter/brighter and some darker depending on the subject matter and mix of colors. So intuitively, I would think it makes more sense to adjust the tonality on an image-by-image (painting-by-painting) basis.
In my opinion, you can use all the calibration techniques and scripts that are available, and create as many presets as you want to meet different situations. But these presets only provide you with a starting point for each of your different shooting situations, and the final outcome must be determined by how the image looks to you. Therefore, individual image adjustment is almost always a necessity.
I've done some testing in ACR, and I'm convinced now that developing a tonality preset based on the ColorChecker grayscale is generally not a good idea. The CC use is most valuable for setting the White Balance and for camera calibration (for color rendering).
I welcome comments/advice from others w/ experience to the contrary.