Fujifilm Fujinon XF 23 mm f/1.4 R LM WR
8. Vignetting
| X-T2, JPEG, f/1.4 | X-T2, RAW, f/1.4 |
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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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It is clear that vignetting is corrected automatically on JPEG files and you cannot switch that process off. Results are moderate: by f/1.4 brightness loss in frame corners amounts to 31% (−1.09 EV) and it decreases to 24% (−0.79 EV) on stopping down the aperture to f/2.0. By f/2.8 the aberration, described here, drops slightly to 23% (−0.76 EV), and by f/4.0 to 17% (−0.54 EV). In case of the f/5.6 aperture and higher you deal with a level of 12% (−0.36 EV).
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Still, the real situation can be perceived only after analysing RAW files. At the maximum relative aperture vignetting amounts to 52% (−2.11 EV). It's a lot but if you take into account the aperture fastness and the angle of view of this lens you can say the Fujinon doesn't fare weaker than its rivals. Additionally, it's a result, within the margin of error, practically the same as the result of its predecessor and the Viltrox which both had vignetting near 50%.
We are a bit surprised by slow decrease of vignetting on stopping down. By f/2.0 you deal with a level of 41% (−1.52 EV), by f/2.8 the aberration, described here, decreases to 37% (−1.32 EV). In case of f/4.0 we got 32% (−0.13 EV), and by f/5.6 it was a level of 28% (−0.94 EV). By f/8.0 and higher aperture values vignetting stays near 25% (−0.85 EV).
| Fujifilm X-T2, RAW, f/1.4 |
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