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Sony A7R III
Sigma 70mm f/2.8 DG Macro

White Balance and Tint in Adobe Camera Raw, Mid-Day Sun

This page uses a SpyderCHECKER® color checker card to evaluate the white balance and tint needed in mid-day sun for the Sigma 70mm f/2.8 DG Macro Art, using Photoshop/ACR raw file conversion.

The following process was followed to ensure the best possible neutrality of the grayscale (black to white) patches on the color card:

  1. Use click white balance as a starting point.
  2. Perform, twice, a 15 pixel Gaussian Blur. In Lab mode, check for neutral tint ('a' channel) and neutral color ('b' channel).
  3. Adjust color temperature and tint; repeat steps 2 and 3 until the best possible neutrality is achieved.

Evaluation: Mid-Day Sunlight, 500' elevation

An about $127 DataColor SpyderCHECKER was used for this evaluation. I use the clamshell version so I can safely carry it without damaging it. I do not use the calibration software as I have not been satisfied with the results versus the stock Adobe profiles.

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Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.

Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.

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f5.6 @ 1/1000 sec, ISO 100; 2018-07-20 12:05:03
Sony A7R III + Sigma FE 70mm f/2.8 DG Macro Art ENV: altitude 500 ft / 152 m

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