Let’s try this file for experimenting with Sigmoid. After opening I see some trouble with the file and had to adjust the black offset here which I’m not used to do very often. But OK.
My reference edit with Filmic v5 gives a usable result. Sigmoid has much less control possibilities but looks also reasonable, but in my opinion Filmic looks still more natural when increasing contrast, especially when rendering the overexposed sky and the excavator, whereas increasing contrast in Sigmoid soon leads to the impression of “a bit overdone”.
This is the Filmic version:
20200717_Garzweiler_3278.DNG.xmp (6,8 KB)
This is the Sigmoid verison:
20200717_Garzweiler_3278_sigmoid.DNG.xmp (6,7 KB)
Both algos are really hard to match. In this picture Filmic gives much more “clearity” in the shades and better rendition of the colors of the sandy material in the background.
Here is a snapshot comparison (filmic left vs. sigmoid right) at the “same” contrast factor (1.8)
Btw., I captured myself a photo of the older excavator 258 in 2013 with some people at the wheel, which has a diameter of 15m. This is much smaller than the diameter of 21,6m of excavator 288, but still impressive.
