Sigma APO 50-500mm f/4.5-6.3 DG OS HSM Nikon mount lens review: solid performance, accessible priceBy Kevin Carter - Tuesday August 20 2013 Lens Review
Sigma 50-500mm F4.5-6.3 APO DG OS HSM Nikon Versus Nikon AF-S NIKKOR 80-400mm f/4.5-5.6G ED VR:
both mounted on Nikon D600:
Compared with its direct rival, the newer Nikon 80-400mm f/4.5-5.6 ED VR, the Sigma is on a par optically coming just slightly behind in the overall DxOMark score (which is a benchmarking exercise) but can boast slightly better sharpness overall. There is a caveat though. While the Sigma is better than the older Nikon version where it counts (at the tele-end), the improvement in sharpness over this new model is at the less useful shorter end of the zoom range.
The new Nikkor is also brighter by around a half-stop throughout the equivalent zoom range, and it has slightly lower levels of distortion, vignetting and chromatic aberration.