I would have like to see some photos in the review taken without flash, to get a true idea of how well the lens performs. Flash always make the images look artificially sharp, now matter how good (or bad) a lens is...
The eagle shot is without flash. I was lucky to have a light cloud cover so the contrast was not too high and the whites and dark feathers were both exposed OK (1DX, ISO 1600, f4). Bald eagles in direct sunlight are tough. Processed only in DPP w some brightening to the shadows.
1Dx, 5DMKIII, 5DSR, 600 II, 300 II, 200 f2, 135 f2, 85 1.2 II, 100 2.8 IS, 24TS II, 70-200 II, 24-70 II, 16-35 II, 100-400 II, 11-24