Olympus Zuiko Digital 9-18 mm f/4-5.6 ED review - Vignetting

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Olympus Zuiko Digital 9-18 mm f/4-5.6 ED

14 May 2009

Arkadiusz Olech

8. Vignetting

The result in this category interested us a lot. The ultra-wideangle lenses with the field of view of about 100 degrees, designed to work on ASP-C/DX matrixes, had a loss of brightness in the corners of about 40-50%. Olympus simply outclassed its competitors in this category. Even using the most demanding combination of the widest angle and maximum aperture, the vignetting reached the rather low level of 19% (-0.61 EV); on stopping down to f/5.6 it almost disappeared (11%).

Olympus Zuiko Digital 9-18 mm f/4-5.6 ED - Vignetting

When you look at the results for longer focal lengths, you can’t help cheering – there are practically no vignetting problems. At 14 mm and by f/4.8 the corner illumination fall is just 11% (-0.35 EV) and it decreases to 9% by f/5.6. The results are even better for the maximum focal length, although it is hard to believe. Even at a maximum aperture, the vignetting is non-existent (9% - truly imperceptible level!)

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