Sony FE 35 mm f/1.8
7. Coma, astigmatism and bokeh
| Center, f/1.8 | Corner APS-C, f/1.8 | Corner FF, f/1.8 |
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| Center, f/2.5 | Corner APS-C, f/2.5 | Corner FF, f/2.5 |
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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 |
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| Center, f/2.5 | Corner APS-C, f/2.5 | Corner FF, f/2.5 |
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Center, f/3.5 | Corner APS-C, f/3.5 | Corner FF, f/3.5 |
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