LensTip.com

Lens review

Samyang AF 45 mm f/1.8 FE

12 September 2020
Maciej Latałło

7. Coma, astigmatism and bokeh

Coma correction of the Samyang AF 45 mm f/1.8 FE is really exemplary. Even at the maximum relative aperture and in corners of full frame diode images are almost identical to those you get in the frame centre. In this cateogry the lens should be only praised.

Center, f/1.8 Corner APS-C, f/1.8 Corner FF, f/1.8
Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh
Center, f/2.5 Corner APS-C, f/2.5 Corner FF, f/2.5
Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh


Astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to 12.7% and we consider it to be a medium level. We think in this category you could expect a tad better results.


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Out-of-focus images are decent but certainly they cannot be called very nice. Aspherical elements inside the lens mean that you can notice a distinct trace of onion-ring bokeh. Fortunately the lighter rim around the circles is not especially bothersome. Mechanical vignetting makes itself felt for a change but, with such small dimensions of the lens, it was quite predictable. Circles are strongly truncated in frame corners at the maximum relative aperture and that effect remains visible even on stopping down the lens by 2 EV.

Center, f/1.8 Corner APS-C, f/1.8 Corner FF, f/1.8
Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh
Center, f/2.5 Corner APS-C, f/2.5 Corner FF, f/2.5
Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh
Center, f/3.5 Corner APS-C, f/3.5 Corner FF, f/3.5
Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh Samyang AF 45 mm f/1.8 FE - Coma, astigmatism and bokeh