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Lens review

Olympus M.Zuiko Digital 12 mm f/2.0 ED

3 August 2011
Szymon Starczewski

8. Vignetting

On the one hand a wide angle of view, good aperture fastness and small dimensions might suggest some vignetting problems are due to appear. On the other hand we deal here with a small sensor and the lens is not a small “pancake” after all.

At the maximum relative aperture the brightness loss in the frame corners reaches a high level for the Micro 4/3 system – that of 40% (-1.49 EV). Fortunately on stopping down by one stop you can see this aberration decrease by over 20%. By f/2.8 the vignetting level is already 19% (-0.61 EV). The problem practically disappears completely by f/4.0, where the vignetting amounts to just 11%.

Because of the program distortion correction RAW files have a bit wider angle of view that JPEG files. That’s why the vignetting measured using the former format is a bit higher as well. However, in this case the differences are not big - the level of RAW vignetting is just 2-4% higher than that of JPEG files.

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JPEG RAW
f/2.0 f/2.0
Olympus M.Zuiko Digital 12 mm f/2.0 ED - Vignetting Olympus M.Zuiko Digital 12 mm f/2.0 ED - Vignetting
f/2.8 f/2.8
Olympus M.Zuiko Digital 12 mm f/2.0 ED - Vignetting Olympus M.Zuiko Digital 12 mm f/2.0 ED - Vignetting
f/4.0 f/4.0
Olympus M.Zuiko Digital 12 mm f/2.0 ED - Vignetting Olympus M.Zuiko Digital 12 mm f/2.0 ED - Vignetting


Olympus M.Zuiko Digital 12 mm f/2.0 ED - Vignetting