Thanks everyone for commenting. David asked how I did it: I don't trust the AF en light meter with IR. Distance is manually set on the IR mark on the lens. Exposure is checked with the histogram function. In bright sunlight it's app 0.5-1 sec at f/8 on a tripod. I did AWB on green grass and shoot RAW. The AWB is done once for recording the optimal WB settings. The rest is done in PS, only auto levels and black and white filter with manual adjustments (mainly yellow) to get the best rendering. I sometimes add a red blue channel swap or a second layer which is inverted and blended by color, not this time.
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