LensTip.com

Lens review

Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH.

21 August 2017
Arkadiusz Olech

7. Coma, astigmatism and bokeh

We don’t have the slightest reservations concerning the coma correction of the Panasonic 8-18 mm. The image of a diode, after shifting to the frame corner, increases a bit its size but there are no distinct deformations. Here the lens manages quite well.

E-M5 II, 8 mm, f/2.8, center E-M5 II, 8 mm, f/2.8, corner
Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh
E-M5 II, 13 mm, f/3.5, center E-M5 II, 13 mm, f/3.5, corner
Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh
E-M5 II, 18 mm, f/4.0, center E-M5 II, 18 mm, f/4.0, corner
Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh


Astigmatism, understood as an average difference between vertical and horizontal MTF50 function values, amounted to 10% so can be called medium. Still the maximum focal length is the biggest contributor to that value as the astigmatism level at that point reaches 14%.


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Taking into account the fact that you deal here with an ultra wide-angle zoon lens we cannot criticize the blurry areas too harshly. Only features that stick out in a negative way are a lighter rim and deformations of the circle due to the lens’s mapping. After all out-of-focus areas are not a feature you expect from a lens with such angles of view, additionally offered for a small Micro 4/3 camera format.

E-M5 II, 18 mm, f/4.0, center E-M5 II, 18 mm, f/4.0, corner
Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh
E-M5 II, 18 mm, f/5.6, center E-M5 II, 18 mm, f/5.6, corner
Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh
E-M5 II, 18 mm, f/8.0, center E-M5 II, 18 mm, f/8.0, corner
Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Coma, astigmatism and bokeh