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Lens review

2012-03-29
 

Sigma 30 mm f/2.8 EX DN

8. Vignetting

On RAW and JPEG files the vignetting is very similar. The RAW results, presented below, are by about 1-2% higher than those reached on JPEG files. The difference stems from the fact that JPEG files compared to RAWs are slightly cropped, not because the camera body corrects that aberration.

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
Sigma 30 mm f/2.8 EX DN - Vignetting Sigma 30 mm f/2.8 EX DN - Vignetting
f/4.0 f/4.0
Sigma 30 mm f/2.8 EX DN - Vignetting Sigma 30 mm f/2.8 EX DN - Vignetting
f/5.6 f/5.6
Sigma 30 mm f/2.8 EX DN - Vignetting Sigma 30 mm f/2.8 EX DN - Vignetting



Sigma 30 mm f/2.8 EX DN - Vignetting

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