Canon EF 70-200mm f/4L IS USM
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Canon EF 70-200mm f/4L IS USM Lens Review
By: What Digital Camera (Feb 20, 2013)
Overall, the f/4 lens clearly plays second fiddle on paper but it is a very easy lens to carry and to use. Though it is expensive it is only roughly half that of the f/2.8 version, based on Canons SRPs. So there's probably a case for saying Canon has made the f/4 lens too good compared with the f/2.8 version. Its compromises and limitations are slight but its price advantage is substantial.
Review of Canon EF 70-200mm f/4L IS USM
By: SLR Gear
It isn't easy to improve on an almost flawless lens like the Canon 70-200mm f/4L, unless you add 4-stop Image Stabilization without degrading any of the optical or build qualities. This lens tests and performs as well, or better than, any lens tested recently. It is quite sharp across its entire aperture-focal length spectrum; chromatic aberration, vignetting, and distortion are all quite...