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Lens review

Panasonic Leica DG Summilux 25 mm f/1.4 ASPH.

5 September 2011
Szymon Starczewski

7. Coma, astigmatism and bokeh

The coma makes itself felt at the maximum relative aperture and also on stopping down by 1 EV. Its level is perhaps not especially high but this aberration is certainly an important contributing factor to the resolution limitation on the edge of the frame, described in chapter 4.

Panasonic Leica DG Summilux 25 mm f/1.4 ASPH. - Coma, astigmatism and bokeh

The situation looks a bit better in the case of other off-axis aberration so astigmatism. At the maximum relative aperture it is noticeable but it decreases swiftly on stopping down. Its average value amounted to 9% - definitely not a level we should worry about.

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This chapter we finish by presenting out of focus photos of a diode which might allow us to assess how the lens renders fuzziness and bokeh.

Panasonic Leica DG Summilux 25 mm f/1.4 ASPH. - Coma, astigmatism and bokeh