LensTip.com

Lens review

Fujifilm Fujinon XC 16-50 mm f/3.5-5.6 OIS

14 July 2014
Arkadiusz Olech

8. Vignetting

In the case of JPEG files the vignetting is corrected very efficiently by the software of the camera. You would be hard-pressed to notice it even at the maximum relative aperture where, at both ends of the range, it amounts to about 6-7% (about –0.2 EV) and in the middle of the focal range it reaches just 5% (-0.15 EV).

The situation changes noticeably if you consult the raw files developed by an independent program such as e.g. dcraw.

Fujifilm Fujinon XC 16-50 mm f/3.5-5.6 OIS - Vignetting


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You can see significant problems at the wide angle where, at the maximum relative aperture, the vignetting reaches 43% (−1.62 EV). That value decreases to 34% (-1.22 EV) after applying f/4.0 and to 26% (-0.89 EV) if you stop down the lens to f/5.6. By f/8.0 the vignetting is still noticeable, getting to 19% (-0.61 EV) and by f/11 it decreases to 16% (-0.51 EV).

A significantly better situation can be observed in the middle of the focal range. At the maximum relative aperture the brightness loss in the frame corners amounts to a moderate value of 25% (-0.84 EV). By f/5.6 that aberration is decreased to 19% (-0.60 EV) and by f/8.0 it goes down even more, to 12% (-0.38 EV). Further stopping down has a very slight influence on vignetting: by f/11 it is 11% (-0.33 EV) so it doesn’t differ much from the result you got by f/8.0.

At the maximum focal length the vignetting increases again. By f/5.6 it is 32% (-1.14 EV) but fortunately on stopping down the lens to f/8.0 it becomes slight, reaching just 14% (-0.44 EV), and it disappears almost completely by f/11 (9%).

Fujifilm Fujinon XC 16-50 mm f/3.5-5.6 OIS - Vignetting

Fujifilm Fujinon XC 16-50 mm f/3.5-5.6 OIS - Vignetting

Fujifilm Fujinon XC 16-50 mm f/3.5-5.6 OIS - Vignetting