12) Sigma 18-35mm f/1.8 vs Sigma 30mm f/1.4
Let’s take a look at how the Sigma 18-35mm f/1.8 Art compares to the Sigma 30mm f/1.4 Art @ 35mm and 30mm:
Looks like Sigma’s own 30mm f/1.4 prime cannot compete with the Sigma 18-35mm f/1.8 zoom. The difference in performance is quite evident right at f/1.8, where the Sigma 18-35mm is better not only in the center, but also significantly sharper in the mid-frame and the corners. In fact, the 30mm f/1.4 Art is quite disappointing in comparison – its peak sharpness is reached at f/5.6, while the 18-35mm is extremely sharp at f/2.8!
13) Sigma 18-35mm f/1.8 vs Nikon 35mm f/1.8G
Let’s take a look at how the Sigma 18-35mm f/1.8 fares against the Nikon 35mm f/1.8G:
It is pretty clear that the Sigma 18-35mm f/1.8 is a better candidate for low-light photography than the Nikon 35mm f/1.8G. The Sigma 18-35mm has amazing wide open performance that the Nikon 35mm f/1.8G can only catch up to at f/2.8, and even then it cannot quite match Sigma’s corner performance. The Nikon 35mm f/1.8G produces impressive center and mid-frame sharpness at f/2.8 and smaller, but its corners cannot match what Sigma can do at any aperture.