LensTip.com

Lens review

Nikon Nikkor AF-S 50 mm f/1.8G

5 July 2011
Arkadiusz Olech

7. Coma, astigmatism and bokeh

In the case of the Nikkor AF 50 MM F/1.8D coma was a serious issue. It was visible in the corner of the DX sensor and very big in the full frame corner. As you see looking at the crops below in the case of the new version the situation improved significantly. In the corner of the smaller sensor the coma is still noticeable but rather on a low level. In the corner of full frame it becomes distinct but still smaller than in the predecessor.

Nikon Nikkor AF-S 50 mm f/1.8G - 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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Nikon Nikkor AF-S 50 mm f/1.8G - Coma, astigmatism and bokeh