Tamron SP 85 mm f/1.8 Di VC USD
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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The astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to 3.2% so was low. It would be difficult to see it even near the maximum relative aperture.
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Circles of light, generated by the Tamron in out-of-focus areas, are very pleasing to the eye. Here Tamron managed to outperform even the results we saw in the 1.8/45 and 1.8/35 models – not even a trace of any onion rings.
| 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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