Sony FE 35 mm f/1.4 GM
7. Coma, astigmatism and bokeh
| Center, f/1.4 | Corner APS-C, f/1.4 | Corner FF, f/1.4 |
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| Center, f/2.0 | Corner APS-C, f/2.0 | Corner FF, f/2.0 |
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Astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to just 1.4%. It is a negligible level that shouldn't bother you at all.
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The appearance of out-of-focus images is very nice, with smooth light spread in circles. Onion ring bokeh doesn't make itself felt despite aspherical elements; a brighter rim that appears on more significant stopping down is not especially intensive. Mechanical vignetting is clearly visible for a change but only by f/1.4; by f/2.0 it becomes marginalized and by f/2.8 it disappears completely.
| Center, f/1.4 | Corner APS-C, f/1.4 | Corner FF, f/1.4 |
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| Center, f/2.0 | Corner APS-C, f/2.0 | Corner FF, f/2.0 |
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Center, f/2.8 | Corner APS-C, f/2.8 | Corner FF, f/2.8 |
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