Canon EF 24-85 mm f/3.5-4.5 USM review - Vignetting

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Canon EF 24-85 mm f/3.5-4.5 USM

22 September 2007

Arkadiusz Olech

8. Vignetting

As we expected for a full frame lens, the vignetting with the APS-C detector is not a problem. In the most difficult combination of 24mm focal length and f/3.5 the light fall off reaches 15% (-0.4 value of the diaphragm). Slightly stopping down the lens improves the situation to 10%.

Canon EF 24-85 mm f/3.5-4.5 USM - Vignetting

At the 50mm focal length the situation is even better. At f/4.5 the vignetting reaches 12% and at f/5.6 it is 7%. At 85mm the situation is similar. At the open aperture it is 13% and at f/5.6 it is only 8%.

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When we observe the weak performance of the small digital detector lenses, the vignetting seems to be a clear reason to invest in a full frame lens. Besides, in the future, when all of us will be using the FF, the EF class lenses will serve us as much as they do now.