Lens review

Olympus M.Zuiko Digital 75 mm f/1.8 ED

5 October 2012
Arkadiusz Olech

4. Image resolution

The resolution test of the Olympus 1.8/75 was based on RAW files from the Olympus E-PL1 camera. In the case of that body the highest results achieved by the best fixed-focus lenses are about 80 lpmm (the record value of 82.6 lpmm was reached by the Voigtlander 0.95/25). The decency level is set near 42 lpmm.

Let’s glance at a graph, posted below, and check how the tested lens compares here.

Olympus M.Zuiko Digital 75 mm f/1.8 ED - Image resolution

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The performance in the frame centre can be only called brilliant. Already at the maximum relative aperture the lens goes to a very high level of over 64 lpmm. Stopping down the aperture only improves the situation further – near f/4.0 you are on a practically record level as the lens gets to 82 lpmm there. Taking into account measurement errors, the images generated by the Olympus are as sensationally sharp like those of the Voigtlander 0.95/25 or the Panaleica 1.4/25.

The edge of the frame fares a bit worse but not because it is bad but because it is compared to excellent achievements in the centre. If you only assess the edge of the frame separately any reasons to complain will vanish without trace instantly. Even at the maximum relative aperture the image remains fully useful and on slight stopping down it becomes very sharp.

In the resolution category the Olympus M.Zuiko Digital 75 mm f/1.8 ED deserves only and solely to be praised and it cannot be praised too highly.

Below we present crops of our resolution testing chart, taken from JPEG files saved along RAW files, which were used for the analysis above.

Olympus M.Zuiko Digital 75 mm f/1.8 ED - Image resolution