Canon 24-105mm f/4L lens test posted on SLRgear.com By
Dave Etchells, The Imaging Resource (Monday, July 31, 2006 - 13:13 EDT)This has been one of the most-requested lenses for us to test, so it's with great pleasure that we use it to mark our return to active test-posting.
While expensive lenses don't always justify their prices, the Canon 24-105mm f/4L is one that clearly does - at least, on cameras with APS-C size sensors like the EOS-30D (we tested on an EOS-20D). When we tried it on our full-frame EOS-5D body, we discovered that it struggled a bit along the edges and in the corners, with a little softness, more chromatic aberration, and a lot more distortion and light falloff (vignetting).
The good news though, is that this otherwise excellent optic is supported on most recent Canon bodies by the superb DxO Optics Pro software, so its few foibles can be fairly easily dealt with. Check it out, this is one sweet lens, just the ticket for a "walk-around" lens to use in a wide variety of shooting situations!
Canon 24-105mm f/4L lens test posted on SLRgear.com