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Lens review

Panasonic Leica DG Nocticron 42.5 mm f/1.2 Asph. P.O.I.S.

9 January 2014
Arkadiusz Olech

8. Vignetting

Fast lenses always have to fight hard in order to control vignetting. The Leica 1.2/42.5 is not free of that aberration either and the thumbnails shown below are the proof.

Panasonic Leica DG Nocticron 42.5 mm f/1.2 Asph. P.O.I.S. - Vignetting


At the maximum relative aperture the brightness loss in the frame corners reaches 54% (-2.23 EV) – a very weak result indeed. Even the vignetting level of the full frame Canon EF 85 mm f/1.2L USM II was by 1% lower! When you stop down the aperture to f/1.4 the vignetting decreases to 49% (-1.95 EV) which is still a huge value. The problem becomes moderate by f/2.0, where it amounts to 22% (-0.73 EV), and it disappears completely by f/2.8, where it is just 10% (-0.29 EV).

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The assessment in this category can’t be positive. If a lens, designed for a small Micro 4/3 sensor, has the same light fall-off as its equally fast full frame equivalent it is nothing to boast of.

Panasonic Leica DG Nocticron 42.5 mm f/1.2 Asph. P.O.I.S. - Vignetting