You asked
Nikon af s 24mm f 1 4g ed vs sigma 24mm f 1 4 dg hsm art?
Both are 24mm f/1.4 autofocus primes for full frame, and neither is stabilised, so the choice mostly comes down to your camera mount. On a Nikon F body, they frame and blur the same way.
If you shoot Nikon, the Nikon AF-S 24mm f/1.4G ED is the straightforward pick. It's made for Nikon F and nothing else.
The Sigma 24mm f/1.4 DG HSM Art is the more flexible option. It fits Canon EF, Nikon F, Sony E and L-Mount, so it suits you if you might switch systems or already shoot Canon or Sony. Before buying any third-party lens, check that your body supports its autofocus and that the maker allows it on your mount, as the lenses guide explains.
Written by Claude from this site's pages.