Fujifilm Fujinon XF 50 mm f/1.0 R WR
8. Vignetting
| X-T2, JPEG, f/1.0 | X-T2, JPEG, f/1.4 |
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| X-T2, JPEG, f/2.0 | X-T2, JPEG, f/2.8 |
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Despite an excellent aperture fastness you don't see here any significant problems. Vignetting is visible at the maximum relative aperture where it amounts to 34% (−1.22 EV). The situation improves very quickly on stopping down so by f/1.4 the aberration reaches 28% (−0.95 EV); by f/2.0 it decreases to 17% (−0.53 EV) and by f/2.8 it becomes imperceptible, being just 7% (−0.23 EV)
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Still the real level of vignetting you can determine only by examining RAW files – appropriate thumbnails you can find below.
| X-T2, RAW, f/1.0 | X-T2, RAW, f/1.4 |
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| X-T2, RAW, f/2.0 | X-T2, RAW, f/2.8 |
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At the maximum relative aperture, you must take into account brightness loss of 45% (−1.73 EV). That's a lot but if you remind yourself that full frame 1.8-1.4 lenses with similar angles of view sometimes have results of 2-3 EV in this category, the overall assessment can't be bad. Especially that vignetting decreases very quickly on stopping down. By f/1.4 we got a result of 33% (−1.16 EV), by f/2.0 it decreases to just 18% (−0.57 EV), and by f/2.8 all vignetting problems end because its level drops to an imperceptible value of 9% (−0.27 EV).
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| Fujifilm X-T2, RAW, f/1.0 |
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