DxOMark review for the Nikon 24-120, the new constant f/4 aperture on DxOMark.

Lateral chromatic aberration

Better construction enables the new zoom to perform a little bit better than the previous model when dealing with chromatic aberration. But there are still some perturbations, especially between 24 and 35mm at apertures ranging from f/4 to f/11. For the remaining zoom range, the aberrations are still noticeable between 35mm f/8 and 75mm f/5.6. The best performance of the 24-120mm f/4 is obtained between 50 to 120mm when stopping down above f/8.

24-120mm f/4 on a full frame sensor (D3x): lateral chromatic aberrations are stronger at wide aperture and short focal lengths.

24-120mm f/3.5-5.6 on a full frame sensor (D3x): lateral chromatic aberrations are significant at the beginning and at the end of the zoom range, at any aperture.

Used on APS-C sensors, the scenario changes completely once again: the chromatic aberrations are noticeable along the whole zoom range between f/4 and f/5.6. Above f/8, the lens behaves quite well.

24-120mm f/4 on an APS-C sensor (D300s): lateral chromatic aberrations are essentially contained above f/8.