Sigma 30 mm f/2.8 EX DN
8. Vignetting
At the maximum relative aperture the vignetting is noticeable without any problems. The value of 24% (-0.81 EV) this lens reaches there is certainly not bothersome though. On applying f/4.0 aperture the level of that aberration decreases to 14% (-0.45 EV). By f/5.6 and f/8.0 the vignetting becomes imperceptible, amounting to 11% and 10% respectively.
You should remember that the presented files concern the Micro 4/3 sensor so the vignetting on a bigger APS-C detector will certainly be higher.
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| 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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