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Lens review

Canon EF 100 mm f/2.8 Macro USM

23 October 2009
Szymon Starczewski

8. Vignetting

We can expect good results in this category from a prime lens of these dimensions, in addition designed to work on full frame.

Canon EF 100 mm f/2.8 Macro USM - Vignetting


At the maximum relative aperture the brightness loss in the frame corners amounts to 21% (-0.69 EV). It’s an average result and if you want to be very meticulous you can complain a bit because on full frame this value is bound to increase significantly. Fortunately on stopping down to f/4.0 the problem disappears completely (5%).

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Canon EF 100 mm f/2.8 Macro USM - Vignetting