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Canon EF 100-300 mm f/4.5-5.6 USM

22 September 2007
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Arkadiusz Olech

8. Vignetting

We were sure the Canon would not have any problems in this category since the lens was designed for the full frame. Indeed, the results we achieved were excellent. At 100 mm and 200 mm focal length the light fall off in the corners of the frame, even with the open aperture, is absent and in both cases reaches only 7% (-0.2 the value of the diaphragm). A slight stopping down of the lens decreases the problem to as little as 3%.

Canon EF 100-300 mm f/4.5-5.6 USM - Vignetting

The strongest, although still quite low, vignetting can be noticed at the biggest focal length. There, at the open aperture, we notice a light fall off of 15% (-0.48 the value of the diaphragm). When stopping down the lens to f/8, the vignetting is reduced to a very low value of 2%.


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Canon EF 100-300 mm f/4.5-5.6 USM - Vignetting

Canon EF 100-300 mm f/4.5-5.6 USM - Vignetting



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