Fujifilm Fujinon XF 14 mm f/2.8 R
8. Vignetting
| JPEG | RAW |
| f/2.8 | f/2.8 |
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| f/4.0 | f/4.0 |
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| f/5.6 | f/5.6 |
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The users of the JPEG format won’t have any serious reasons to complain – the vignetting here is medium at most. At the maximum relative aperture it reaches 24% (-0.78 EV) and it decreases slightly to 22% (-0.71 EV) on stopping down to f/4.0. A quite significant drop of vignetting can be observed when you pass from f/4.0 to f/5.6 where that aberration is just 16% (-0.52 EV) After further stopping down you don’t see any measurable change of the vignetting level – in the range from f/8 to f/16 we got values reaching near 15% (-0.47 EV).
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A much more serious situation can be observed in the case of RAW files. At the maximum relative aperture, in the frame corners, you lose as much as 51% of light (-2.09 EV). There are huge problems by f/4.0 as well, where the vignetting reaches 41% (-1.52 EV). By f/5.6 that aberration remains still visible, getting to 35% (-1.27 EV). Further stopping down doesn’t have any measurable influence on the vignetting because that aberration value stops at 34% (-0.19 EV).
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