Nikon Nikkor Z 24-70 mm f/2.8 S
7. Coma, astigmatism and bokeh
| Center, 24 mm, f/2.8 | Corner APS-C, 24 mm, f/2.8 | Corner FF, 24 mm, f/2.8 |
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| Center, 45 mm, f/2.8 | Corner APS-C, 45 mm, f/2.8 | Corner FF, 45 mm, f/2.8 |
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| Center, 70 mm, f/2.8 | Corner APS-C, 70 mm, f/2.8 | Corner FF, 70 mm, f/2.8 |
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Astigmatism, understood as an average difference between vertical and horizontal MTF50 function values amounted to 6.2%. It's a moderate level. We also didn't notice any significant differences between particular focal lengths even though officially the lowest result we got at 70 mm.
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Defocused circles of light look very nice - they don't feature any distinct traces of onion ring bokeh or a significantly brighter rim. Mechanical vignetting is the bother, though, as it is very distinct by f/2.8, noticeable by f/4.0 and still slightly accented by f/5.6.
| Center, 70 mm, f/2.8 | Corner APS-C, 70 mm, f/2.8 | Corner FF, 70 mm, f/2.8 |
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| 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, 70 mm, f/5.6 | Corner APS-C, 70 mm, f/5.6 | Corner FF, 70 mm, f/5.6 |
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