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Lens review

Panasonic G 14 mm f/2.5 ASPH.

16 November 2010
Szymon Starczewski

7. Coma and astigmatism

At the maximum relative aperture the coma influence is visible but the level of this aberration is not exceptionally high. On stopping down by 1 EV we see the coma decreasing to a low level.

Panasonic G 14 mm f/2.5 ASPH. - Coma and astigmatism

The astigmatism of the tested lens is negligible. The average difference between horizontal and vertical MTF50 function values amounted to less than 3% which is a very low result.

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The astigmatism as an off-axis aberration, increases swiftly when you move away from the proximity of the frame centre. In the case of the tested lens it increased very slowly on the right side of the frame and much faster on the left side. Because of that in the case of some shots the left side of the frame can differ from the right side when it comes to the sharpness level.