Sony FE 85 mm f/1.8
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 8.6% which we consider a value on the borderline between low and medium levels.
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When it comes to out-of-focus, blurry areas, it would be difficult to complain. Defocused circles of light look very nice and the light spread inside them is even. The only flaw we noticed concerns a slightly accented rim but you also have to add to that the influence of mechanical vignetting. It is easy to perceive not only in photos showed by us in this chapter but by f/5.0 aperture as well. I honestly can't remind myself such a weak result in this category.
| 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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