Review on Canon EF-S 15-85mm f/3.5-5.6 IS USM UD Lens: High-Quality Standard Zoom for Canon DSLR Cameras by Xavier Xavier ᠌

The nature of the blurring at the edges is due not only to chromatism, but also to other aberrations that are not corrected in the DPP RAW converter. At equal focal lengths of 55-85mm (at aperture 5.6) with a Canon EF-S 55-250mm f / 4-5.6 IS lens, it outperforms 15-85 at the edges by a factor of 2. In the center, they have parity. By the way - Canon EF-S 55-250mm f / 4-5.6 IS (by 55mm) surpasses even Canon EF-S 17-55mm f/2.8 IS USM ! You can throw yourself at me, but this is all a sad fact. Before that, I had a Canon EF-S 17-55mm f/2.8 IS USM, I sold it because needed a wide angle for a vacation. So there is something to compare with. So it makes sense to take it if you need a wide angle, otherwise it’s better to take the Canon EF-S 18-135mm f / 3.5-5.6 IS STM - it’s 2 times cheaper, and the quality is almost the same. Yes, even the sharpness in the corners almost does not depend on the aperture!