Panasonic G Macro 30 mm f/2.8 ASPH. MEGA O.I.S. review - Vignetting

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Panasonic G Macro 30 mm f/2.8 ASPH. MEGA O.I.S.

17 March 2016

Arkadiusz Olech

8. Vignetting

Let’s glance at thumbnails below to assess the vignetting of the tested lens.

Olympus E-PL1, f/2.8	Olympus E-PL1, f/4.0

Olympus E-PL1, f/5.6	Olympus E-PL1, f/8.0

At the maximum relative aperture you have to take into account the loss of 38% (−1.37 EV) of light in the frame corners. It is not a result to be proud of but also nothing to be ashamed of. It is more worrisome that the vignetting decreases quite slowly with the stopping down. By f/4.0 its value reaches 24% (−0.81 EV), and by f/5.6 it is 17% (−0.39 EV). Even by f/8.0 you get some chances to notice it as we got a value of 13% (−0.39 EV).

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The vignetting is by 1-3% higher for RAW files and it is mainly a result of a bit wider field of view, leaving some margin necessary for the distortion correction done by the software of the camera.