Fujifilm Fujinon XF 23 mm f/2 R WR
8. Vignetting
| X-E1, JPEG, f/2.0 | X-E1, RAW, f/2.0 |
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| X-E1, JPEG, f/2.8 | X-E1, RAW, f/2.8 |
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| X-E1, JPEG, f/4.0 | X-E1, RAW, f/4.0 |
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Although the lens correct the vignetting in JPEG files you can still notice it at the maximum relative aperture as it amounts to 28% (−0.93 EV). Even by f/2.8 it would be difficult to call its level low as it still reaches 20% (−0.63 EV). The problem becomes negligible only by f/4.0 and f/5.6 where it decreases to 12% (−0.36 EV) and 9% (−0.27 EV) respectively.
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In RAW files, however, the vignetting shows its true colours. At the maximum relative aperture you have to deal with brightness loss amounting to as much as 56% (−2.35 EV) in frame corners. It is a high value, partially stemming from small dimensions of the lens. Even the Fujinon 1.4/23 at its maximum relative aperture had a better result.
That aberration is still visible pretty well by f/2.8 where it reaches 40% (−1.49 EV). Only by f/40 and f/5.6 it diminishes to moderate values, 28% (−0.94 EV) and 24% (−0.80 EV) respectively. Further stopping down decreases the vignetting only by 1% at most.
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