Viltrox AF 23 mm f/1.4 XF
8. Vignetting
| X-T2, JPEG, f/1.4 | X-T2, JPEG, f/2.0 |
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| X-T2, JPEG, f/2.8 | X-T2, JPEG, f/4.0 |
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At the maximum relative aperture you see a lot of problems in this area because brightness loss in frame corners amounts to as much as 50% (-1.99 EV). It's also surprising that by f/2.0 vignetting decreases just slightly, to 44% (-1.68 EV). A more pronounced decrease you can observe only by f/2.8, where vignetting amounts to 30% (-1.02 EV). A moderate level of that aberration can be achieved by f/4.0 and f/5.6 apertures where we got, respectively: 17% (-0.55 EV) and 13% (-0.39 EV). Further stopping down didn't have any measureable effect on the aberration, described here.
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| Fujifilm X-T2, JPEG, f/1.4 |
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