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Lens review

Nikon Nikkor Z 50 mm f/1.4

28 October 2024
Maciej Latałło

7. Coma, astigmatism and bokeh

Coma and aberrations of higher degree that make point-like images of a diode put in the frame corners deformed are corrected abyssmally bad. We don't hesitate to use such strong words because the results of these deformations are perfectly visible not only in the corner of full frame but even in the corner of the APS-C/DX sensor. Such a performance explains weak resolution values on the edge of the frame we saw near the maximum relative aperture. To be blunt a lens with such pronounced coma doesn't have any chances to provide sensibly sharp images in that place.

Center, f/1.4 Corner APS-C, f/1.4 Corner FF, f/1.4
Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh
Center, f/2.0 Corner APS-C, f/2.0 Corner FF, f/2.0
Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh


In order to show the weak performance in this category in its full extend we decided to include also crops taken from photos of starry sky and, more precisely, from the upper right-hand corner of full frame. This time, however, we show images by f/1.4, f/2.0, and f/2.8. It is clear that even on stopping down the aperture by 2 EV coma is not corrected completely and its effects remain visible in a form of a slight 'coma'.


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Corner FF, f/1.4 Corner FF, f/2.0 Corner FF, f/2.8
Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh


Astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to 5.7%. It is a result on the borderline of very low and low so never giving you any reasons to complain.

The appearance of out-of-focus images generated by the Nikkor Z 50 mm f/1.4 is very nice. Despite one aspherical element you won't get here even a trace of onion-ring bokeh. The interior of the circles features a very even light spread and the rim that appears on stopping the lens down is not especially intensive. Mechanical vignetting is a bit pronounced but it disappears completely on stopping down the aperture by 2 EV.

Center, f/1.4 Corner APS-C, f/1.4 Corner FF, f/1.4
Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh
Center, f/2.0 Corner APS-C, f/2.0 Corner FF, f/2.0
Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh
Center, f/2.8 Corner APS-C, f/2.8 Corner FF, f/2.8
Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh Nikon Nikkor Z 50 mm f/1.4  - Coma, astigmatism and bokeh