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Lens review

Canon EF 300 mm f/4L IS USM

13 November 2009
Szymon Starczewski

10. Autofocus


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No reservations here. The autofocus operates very quietly and quickly and after using the focus limiter, even with truly lightning speed. On the 20D body we haven’t noticed any back- or frontfocus tendency and the accuracy level was high (6% of misses in studio conditions).

Canon EF 300 mm f/4L IS USM - Autofocus