Reviews and Problems with Canon EF-S 15-85mm f/3.5-5.6 IS USM
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Canon EF-S 15-85mm f3.5-5.6 IS USM
1 February 2010
Summary: A worthy successor to the EF-S 17-85mm IS USM, the new lens boasts a flexible walk-around range with wider-angle coverage equivalent to 24mm, a slightly brighter aperture when zoomed-out, very respectable optical quality (especially at 15mm), along with build quality that's as good as any non-L lens in the Canon catalogue. In short, if you're after a decent quality general-purpose zoom for a compatible EOS DSLR, look no further.
Pros: Flexible range including 24mm coverage., Sharp details into the corners., Quick and quiet USM AF with non-rotating barrel., Smooth manual focusing ring and distance window.
Cons: Poor vignetting with visible darkening in corners., Modest image stabilisation in our tests., Some creep between 24 and 50mm (actual)., As usual for a non-L lens, no hood supplied.
Summary: During testing, this lens has proved itself a capable successor to the popular EF-S 17-85mm IS USM. Although it has some flaws, it is capable of producing excellent results, so long as the limitations of the lens are taken into account.
Pros: Useful zoom range
Cons: Distortion, Vignetting at 15mm, Flare and ghosting performance (no lens hood supplied)
Canon EF-S 15-85mm f/3.5-5.6 USM IS - Review / Lens Test Report
29 October 2009
Conclusion: The Canon EF-S 15-85mm f/3.5-5.6 USM IS is certainly a desirable lens ... if you can get a good one (ours had a bit of QC issue). The resolution is generally very good from 15-50mm whereas you should expect some border softness at 85mm. A weak spot of the lens is the amount of vignetting which is extreme at 15mm @ f/3.5. An edge shading of 1.94EV represents a new (negative) record here at PZ - the lens is somewhat underdesigned here obviously.