Viltrox AF 50 mm f/1.4 Pro review

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Viltrox AF 50 mm f/1.4 Pro

20 April 2026

Maciej Latałło

8. Coma, astigmatism and bokeh

The Viltrox AF 50 mm f/1.4 Pro doesn't correct coma in a perfect way. In the corner of the APS-C/DX sensor the image of a diode is slightly deformed but problems become much more pronounced in the corner of full frame. In that place, apart from classic coma, you can notice influence of aberrations of higher degree in a form of characteristic wings. Still, this level of deformations still fits medium values.

In this category the Viltrox is weaker than almost all rivals, mentioned by us earlier with an exception of the Nikkor. Still the Nikkor's coma performance is really nasty so it would be difficult to be worse than that.

Center, f/1.4	Corner APS-C, f/1.4	Corner FF, f/1.4

Center, f/2.0	Corner APS-C, f/2.0	Corner FF, f/2.0

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To make our test more interesting and comprehensive, we decided to show photos of night sky taken from the right-hand upper corner of full frame by f/1.4, f/2.0, and f/2.8. In this case, coma is very similar to the photos of a diode. At the same time slight coma, connected almost completely to classic coma, remains visible even by f/2.8.

Corner FF, f/1.4	Corner FF, f/2.0	Corner FF, f/2.8

Astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to just 4.2%, a value we consider to be very low. In this category the Viltrox should be praised, especially because only the Sony lens can boast of a better result.

The appearance of out-of-focus images is very pleasant, with even spread of light inside the circles and almost imperceptible onion-ring structure connected to one aspherical element inside the construction.

You can complain a bit about mechanical vignetting. It makes itself felt significantly by f/1.4 and f/2.0, remaining visible also by f/2.8. With such big physical dimensions of the tested lens, such problems shouldn't have happened.

Center, f/1.4	Corner APS-C, f/1.4	Corner FF, f/1.4

Center, f/2.0	Corner APS-C, f/2.0	Corner FF, f/2.0

Center, f/2.8	Corner APS-C, f/2.8	Corner FF, f/2.8