Olympus M.Zuiko Digital 40-150 mm f/2.8 ED PRO review - Distortion

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Olympus M.Zuiko Digital 40-150 mm f/2.8 ED PRO

27 July 2016

Arkadiusz Olech

6. Distortion

The software of micro 4/3 bodies correct the distortion of lenses; in the case of the Olympus PRO 40-150 mm it is done very well. Distortion level remains practically zero at every focal length and exact values we got in our tests are as follow: +0.03%, −0.06%, +0.03% and +0.05%, for 40, 90, 150 and 210 mm (TC) focal lengths respectively.

Still if you want to see the real level of distortion of the tested lens you have to consult RAW files developed by dcraw program. The situation is no longer as rosy, especially at the 40 mm focal length where you observe a noticeable “barrel” of −2.02%. Fortunately at the longer end of the focal range the problems with deformations are not so distinct. At 90 mm the distortion disappears almost completely (+0.12%) and at 150 mm you deal with slight pincushion of +0.71%. After attaching the converter the distortion decreases to −0.09% so you can say there are no problems at all.

Olympus E-PL1, JPEG, 40 mm

Olympus E-PL1, JPEG, 90 mm

Olympus E-PL1, JPEG, 150 mm

Olympus E-PL1, JPEG, 210 mm (TC)

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