Canon EF 24-70mm f/2.8 USM L - Full Format Review / Test Report
Lens Reviews -
Canon EOS (Full Format)
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Review by Klaus Schroiff, published June 2010
Special thanks to Johannes Matzke for providing this lens for testing!
The Canon EF 24-70mm f/2.8 USM L is one of the more mainstream professional grade lenses
in the Canon line up and very popular among pro (especially press) photographers as well
as serious amateur. On full format DSLRs it's a fast standard zoom lens covering everything
from moderate ultra-wide angles up to short tele settings.
The build quality of this lens is exceptional thanks to a tightly assembled combination of
metal and high quality plastic parts. The lens is also designed to survive in harsh
conditions due to sealings against dust and moisture. Regarding its weight of 950g
and a size of 83x123mm it's quite a brick but actually comparable to similar lenses made
by other genuine brand manufacturers.
The lens has a ring-type USM drive based on a front-focusing system resulting
in an extremely fast AF speed. Typical for modern ring-type USM lenses full-time
manual focusing remains possible in one-shot AF mode. The AF speed decreases
significantly in Live-View mode but it's still faster than e.g. the
Sigma AF 24-70mm f/2.8 EX HSM DG here.
The lens has a reverse zooming mechanism so it extends towards the wide end
of the range so the shortest physical length reached at the 70mm setting. While this
may seem odd at first the system makes sense when attaching the deep flower-shaped hood
which remains highly effective at all focal lengths. So with attached hood the
size of the package remains constant. The front element does not rotate of course.
|Optical construction||16 elements in 13 groups incl. 1x UD and 2x aspherical elements|
|Number of aperture blades||8 (rounded)|
|min. focus distance||0.39m (max. magnification ratio 1:3)|
|Filter size||77mm (non-rotating)|
|Hood||petal-shaped, bayonet mount (supplied)|