Sony FE 70-200 mm f/4 Macro G OSS II
7. Coma, astigmatism and bokeh
| Center, 70 mm, f/4.0 | Corner APS-C, 70 mm, f/4.0 | Corner FF, 70 mm, f/4.0 |
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| Center, 135 mm, f/4.0 | Corner APS-C, 135 mm, f/4.0 | Corner FF, 135 mm, f/4.0 |
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| Center, 200 mm, f/4.0 | Corner APS-C, 200 mm, f/4.0 | Corner FF, 200 mm, f/4.0 |
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Astigmatism, understood as an average difference between vertical and horizontal MTF50 function values, amounted to 4.4% and was very low. You also have to notice that the maximum focal length, with astigmatism reaching 6.3%, contributed the most to that value.
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Defocused circles of light didn't make us overly happy, especially after we compared them to the circles generated by the Sony FE 70-200 mm f/2.8 GM OSS II. In case of the model, tested here, you can clearly notice onion ring bokeh. As if it wasn't enough, mechanical vignetting has also a lot to say, its level especially pronounced at the maximum relative aperture, and it doesn't disappear completely even on stopping down the aperture by 2 EV.
| Center, 200 mm, f/4.0 | Corner APS-C, 200 mm, f/4.0 | Corner FF, 200 mm, f/4.0 |
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| Center, 200 mm, f/5.6 | Corner APS-C, 200 mm, f/5.6 | Corner FF, 200 mm, f/5.6 |
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Center, 200 mm, f/8.0 | Corner APS-C, 200 mm, f/8.0 | Corner FF, 200 mm, f/8.0 |
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