Re: "Nikon Z9 vs Sony A1 – The 10 main differences"
molson wrote:
I wasn't too impressed with the one copy of the Sigma 500mm f4 I tried. I thought the few images that were actually in focus were about equal to the first version (1999 vintage) of the Canon 500mm f4L IS in terms of sharpness, and lens designs have improved quite a bit since then.
I wonder what your standards are then. Nothing wrong with high standards, but the Sigma 500mm f4S outdoes the Nikon 500mm f5.6PF in about everything, except for global contrast in flat light and neutral color rendering. So I guess your standards are significantly higher than the 500PF, which again is fine.
When light is rather flat, the Sigma will render a duller image than the 500PF, which will draw more contrast and color even from flat light. The downside of that, is that in high contrast light, the 500PF images can suffer from harshness and too high a level of contrast.
The other thing about the Sigma 500mm f4S, is that it adds a slight warming cast to images, whereas the Nikon 500PF is very neutral.
That is about all that I can find against the Sigma. Your phrasing seems to imply that you had AF problems, which I don't recognize whatsoever. It is more precise and consistent than the 500PF on the D500.
I dont care for defending gear against other gear, but I rate the Sigma 500mm f4S higher than the 500PF, the bokeh, subject isolation, OOF rendering as a whole, 3D feel to the images, fine detail, distance performance, it is all better than the 500PF, and I have a good copy of that lens.
You may have had a bad copy of the Sigma, or suffered from bad calibration.
Nov 10, 2021 at 02:34 PM
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