Carl Zeiss Milvus 85 mm f/1.4
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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Apart from testing the coma in our studio we also got an opportunity to test the Milvus 1.4/85 under a starry sky. We put the lens along with the camera on an equatorial mount and appropriate crops taken from the corner of full frame are presented below. Here the conclusions are a tad more critical. The images of the stars are deformed both by f/1.4 and f/2.0 but still the level of that aberration cannot be called high.
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| 5D MkIII, f/1.4, corner 1:1 |
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| 5D Mk III, f/2.0, corner 1:1 |
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The astigmatism of the tested lens is very low. The average difference between horizontal and vertical MTF50 function values amounted to just 3.1%. It is a result even a tad lower than that of the Otus.
The appearance of defocused light points deserves a lot of praise. The light spread is very even and smooth so you can count on nice out-of-focus areas, very pleasing to the eye. You still have some reservations considering the significant truncation of the circles in the corners of the frame. It seems the mechanical vignetting is very high, we are simply afraid of the results the lens will show in the next category….
| 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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