Fujifilm Fujinon XF 23 mm f/1.4 R
8. Vignetting
| JPEG | RAW |
| f/1.4 | f/1.4 |
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| f/2.0 | f/2.0 |
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| f/2.8 | f/2.8 |
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As long as you work with JPEG files the vignetting shouldn’t bother you at all. At the maximum relative aperture it amounts to 27% (-0.90 EV) and is moderate. After stopping down to f/2.0 it decreases slightly to 22% (-0.73 EV) and when you pass to f/2.8 it becomes imperceptible, reaching just 14% (-0.42 EV). On further stopping down you see only slight improvement – the vignetting gets lower by just 2%.
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The RAW files are just another matter. The vignetting is distinct here, reaching at the maximum relative aperture as high as 50% (-2.01 EV). A noticeable decrease of that aberration is observed on stopping down to f/2.0 - the brightness loss falls to 35% (-1.27 EV). By f/2.8 and f/4.0 you deal with moderate level of vignetting, with the light fall-off in the corners being respectively 23% (-0.77 EV) and 21% (-0.67 EV). Further stopping down doesn’t bring any measurable effects.
Perhaps the results of the Fujinon 1.4/23 are not exactly impressive in this category but still you should remember that such an angle of view and f/1.4 aperture rise the standards quite significantly. It’s also worth remembering that most of full frame constructions of this type fare even worse, having 50-70% of vignetting at the maximum relative aperture.
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