LensTip.com

Lens review

Sony FE 85 mm f/1.8

15 March 2019
Arkadiusz Olech

7. Coma, astigmatism and bokeh

Keeping in mind the coma performance of the Sony FE 85 mm f/1.4 GM, we found the results of its slower brother very good. A slight deformation of images of a diode is visible only in corners of full frame; it means the Sony FE 1.8/85 deals with that aberration pretty well.

Center, f/1.8 Corner APS-C, f/1.8 Corner FF, f/1.8
Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh
Center, f/2.5 Corner APS-C, f/2.5 Corner FF, f/2.5
Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh


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
Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh
Center, f/2.5 Corner APS-C, f/2.5 Corner FF, f/2.5
Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh
Center, f/3.5 Corner APS-C, f/3.5 Corner FF, f/3.5
Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 85 mm f/1.8 - Coma, astigmatism and bokeh