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Lens review

Samyang AF 85 mm f/1.4 FE

5 July 2019
Maciej Latałło

7. Coma, astigmatism and bokeh

Coma correction is exemplary in the area covering the APS-C sensor – even in the corners of the frame and at the maximum relative aperture it is really difficult to notice any deformations of diode images. In the corners of full frame coma starts to be visible but its level is far from bothersome and noticeably lower than in the case of the more expensive Sony FE 85 mm f/1.4 GM.

Center, f/1.4 Corner APS-C, f/1.4 Corner FF, f/1.4
Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh
Center, f/2.0 Corner APS-C, f/2.0 Corner FF, f/2.0
Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh


Astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to just 2.9% which we consider a very low value. What's interesting, the cheaper Samyang once again prevails over the Sony GM 1.4/85.

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The appearance of out-of-focus, blurry areas we find completely acceptable - on stopping down the aperture you can notice a lighter rim but the effect is hardly bothersome. Still mechanical vignetting remains a serious problem – it truncates the circle very distinctly by f/1.4 and remains quite visible by f/2.0.

Center, f/1.4 Corner APS-C, f/1.4 Corner FF, f/1.4
Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh
Center, f/2.0 Corner APS-C, f/2.0 Corner FF, f/2.0
Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh
Center, f/2.8 Corner APS-C, f/2.8 Corner FF, f/2.8
Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh Samyang AF 85 mm f/1.4 FE - Coma, astigmatism and bokeh