Viltrox PFU RBMH 85 mm f/1.8 STM
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 5.0% and can be described as low. It is, at the same time, a result a bit better than that of the Sony which in this category amounted to 8.6%.
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When it comes to blurry areas, it would be difficult to complain. Defocused circles of light look nice indeed, with smooth, even light layout inside. Still a distinct influence of mechanical vignetting should be noticed as it remains visible even by f/3.5. However, the level reached by the Viltrox is a tad better than that of the Sony which performed exceptionally weak in this test 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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