The shot is of a small island, and I was on a slightly larger island...both located across the lake from a power plant.
The Zeiss color and contrast rendition work very well with a low sun and water. The fading in the sky is more from intential post processing than from lens vignetting. Getting the color right is tricky, obviously you want to see some color depth and not just a washout of orange tones due to the setting sun, which I have attempted to do. The water required some compound grad filtering in post, to bring out the dark tones in the reflections.