EXCERPT page containing first few paragraphs. 2018-11-12 17:31:14
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See also the Mireds and Color Temperature Table.
This page uses a SpyderCHECKER ® color checker card to evaluate the difference in white balance and tint between f/1.4 and f/2 with the Sigma 105mm f/1.4 DG HSM Art, using Photoshop/ACR raw file conversion.
The difference is significant with the resulting sickly yellow-green hue if the same white balance and tint are used for f/2 and other apertures as for f/1.4. Exact figures are given for white balance and tint, but what one does for f/1.6 and f/1.8 is an exercise left to the diligent reader.
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Diglloyd DAP is DSLR-oriented, but also contains workflow and other topics. Much of the focus is on Canon and Nikon but also Pentax and Pentax medium format.
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