Nikon Nikkor AF-S 50 mm f/1.8G
7. Coma, astigmatism and bokeh
When it comes to the astigmatism, the cheaper lenses quite often experience problems with its correction. The 1.8/50D model, which astigmatism level reached 17%, can be an example here. The results of the Nikkor AF-S 1.8/50G are hardly perfect but its result, reaching 12%, is still better than the performance of the older lens.
For those who want to see how the off-focus images of point-like light sources look, depending on the aperture and their place in the frame, and assess the bokeh of the lens, we present the crops below. By the way you can also notice here the influence of vignetting and not very circular aperture section.
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