LensTip.com

Lens review

Olympus M.Zuiko Digital 12 mm f/2.0 ED

3 August 2011
Szymon Starczewski

7. Coma, astigmatism and bokeh

The coma is clearly visible but only at the maximum relative aperture – at that setting it is difficult not to notice its influence on the circular image of a diode. Fortunately by stopping down by one stop you can make the problem decrease significantly. The level of this aberration in Olympus is a bit higher than that of the Panasonic 2.5/14. On the other hand, when we start to compare the same aperture values, the differences become negligible and both lenses fare similarly well.

Olympus M.Zuiko Digital 12 mm f/2.0 ED - Coma, astigmatism and bokeh

The astigmatism of the tested lens can be described as medium at most. The average difference between vertical and horizontal MTF50 function values amounts to 9%.

- - - - - - - - - - - - - - - - - advertisement - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Below we also present some off-focus images of a point-like diode which might help you to assess how the lens renders fuzziness.

Olympus M.Zuiko Digital 12 mm f/2.0 ED - Coma, astigmatism and bokeh