Are Sony's sensors 'sensitive' to lens quality? In: Cameras Posted March 11, 2016 definitely. it's not just about resolution. The entire image makes up perceived optical sharpness or more accurately 'detail'. the 24-70/2.8 closed down to f4 will be miles better than the 16-70/4 wide open. mainly due to the reduced unpleasant artefacts like CA, coma, reduced contrast, etc that lenses usually exhibit when used wide open. The 24-70 will have the advantage of being 1 stop further away from it's maximum aperture. it's likely the 24-70 may actually outperform the 16-70, even when set to f2.8.