LensTip.com

Lens review

Sony FE 35 mm f/1.8

2 November 2020
Maciej Latałło

7. Coma, astigmatism and bokeh

As long as you limit yourselv to the APS-C format detector you won't experience any coma problems. In the corners of full frame coma and aberrations of the higher degree deform noticeably point-like images of sources of light and, by doing so, they contribute to worsening of resolution on the frame edges. Still, it should be noticed that if you stop down the aperture by 1EV you are able to improve that situation a lot.

Center, f/1.8 Corner APS-C, f/1.8 Corner FF, f/1.8
Sony FE 35 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 35 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 35 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 35 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 35 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 35 mm f/1.8 - Coma, astigmatism and bokeh


Astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to just 2.4% what is an excellent result. Here the tested lens should be definitely praised.


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Out-of-focus images look very nice. Despite one aspherical element light spread in circles is very even and smooth, without traces of onion ring bokeh. A lighter rim around the circle appears only on a stronger stopping down of the aperture and even then it is not especially intensive. Still, mechanical vignetting makes itself felt as it remains visible in the corners of full frame even after stopping down by 2 EV – in the next chapter we are going to describe that situation in more detail.

Center, f/1.8 Corner APS-C, f/1.8 Corner FF, f/1.8
Sony FE 35 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 35 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 35 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 35 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 35 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 35 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 35 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 35 mm f/1.8 - Coma, astigmatism and bokeh Sony FE 35 mm f/1.8 - Coma, astigmatism and bokeh