Viltrox AF 56 mm f/1.7 Air
8. Vignetting
| X-T2, JPEG, f/1.7 | X-T2, RAW, f/1.7 |
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| X-T2, JPEG, f/2.0 | X-T2, RAW, f/2.0 |
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| X-T2, JPEG, f/2.8 | X-T2, RAW, f/2.8 |
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| X-T2, JPEG, f/4.0 | X-T2, RAW, f/4.0 |
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In case of JPEG files the situation looks very sensible indeed. At the maximum relative aperture vignetting reaches 30% (−1.05 EV), a really moderate result for the f/1.7 aperture, offered by the tested lens. By f/2.0 this aberration decreases to 26% (-0.86 EV), and by f/2.8 it amounts to 22% (-0.73 EV). By f/4.0 and f/5.6 all problems end completely because our results in that place amount to, respectively, 17% (-0.53 EV) and 11% (-0.35 EV).
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Still Fujifilm bodies are known for correcting JPEG files without asking for permission even if you attach to them third-party lenses. Only uncorrected and uncropped RAW files are able to show you the real level of this aberration. Here the results are noticeably higher – at the maximum relative aperture you have to take into account light fall-off reaching 52% (−2.09 EV). It is a high value but still you have to remember that you deal here with a relatively small lens that also features a fast aperture.
By f/2.0 vignetting decreases to 47% (−1.85 EV), and by f/2.8 to 31% (−1.08 EV). By f/4.0 you have to make do with a loss reaching 24% (−0.80 EV), and by f/5.6 this value amounts to 17% (-0.55 EV). All problems end by f/8.0 and f/11.0, where we got the following results: 11% (-0.35 EV) and 9% (-0.27 EV).
| Fujifilm X-T2, RAW, f/1.7 |
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