Nikon Nikkor Z 35 mm f/1.8 S
7. Coma, astigmatism and bokeh
Center, f/1.8 | Corner APS-C, f/1.8 | Corner FF, f/1.8 |
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Center, f/2.5 | Corner APS-C, f/2.5 | Corner FF, f/2.5 |
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Astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to 11.4% and can be described as medium. When you compare that result to the result of the reflex camera version there's a distinct improvement but it also remains weaker than astigmatism of the Canon 2/35 IS and the Tamron 1.8/35 VC.
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When it comes to the appearance of out-of-focus areas it would be difficult to complain. Defocused circles of light are very nice, with light spread very even inside. The only slight flaw is accented onion ring bokeh which, most likely, stem from the fact that there are aspherical elements in the system. You should also notice visible influence of mechanical vignetting – completely perceivable in the corner of full frame even by f/3.5.
Center, f/1.8 | Corner APS-C, f/1.8 | Corner FF, f/1.8 |
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Center, f/2.5 | Corner APS-C, f/2.5 | Corner FF, f/2.5 |
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Center, f/3.5 | Corner APS-C, f/3.5 | Corner FF, f/3.5 |
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