Panasonic G 42.5 mm f/1.7 ASPH. POWER O.I.S. review - Coma, astigmatism and bokeh

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Panasonic G 42.5 mm f/1.7 ASPH. POWER O.I.S.

27 June 2015

Arkadiusz Olech

7. Coma, astigmatism and bokeh

The coma makes itself felt only at the maximum relative aperture but even there its level remains low. That aberration disappears practically completely on stopping down by 1 EV stop. In the case of the Olympus 1.8/45 we observed a very similar performance; still if you look closely at the photos you find out that the Panasonic is minimally better in this category.

E-PL1, 42.5 mm, f/1.7, center	E-PL1, 42.5 mm, f/1.7, corner

E-PL1, 42.5 mm, f/2.2, center	E-PL1, 42.5 mm, f/2.2, corner

The astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to 6.3%. The Olympus fared better in this category for a change as in its case the astigmatism was 5%. Still both values are slight and there are no serious reasons to complain.

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The circles of light we got in the blurred areas look nice - the light spread is even, without any local extremes. The tested lens should be only praised here.

E-PL1, 42.5 mm, f/1.7, center	E-PL1, 42.5 mm, f/1.7, corner

E-PL1, 42.5 mm, f/2.2, center	E-PL1, 42.5 mm, f/2.2, corner

E-PL1, 42.5 mm, f/3.2, center	E-PL1, 42.5 mm, f/3.2, corner