Quote Originally Posted by Derek Reese
For what I'll use this lens for, I don't think f/2.8 vs f/4 will make a difference.

In that case it sounds like the 24-105 f/4 L IS would be the best choice for you. There are some photographers (e.g. Thom Hogan) that don't really use "normal" zooms (17-50), but prefer to go right from ultra wide (10-22) to telephoto (44-125). I'm similar to that: I like to shoot the crop equivalent of 15mm, 31mm, and 44-125, so I, too, don't use a "normal" zoom. I think you might fall into the same category, since you're planning 10-22 and 24-105 on a crop.


I think you will really like that combination. If you upgrade to full frame in the future, you'll find that there is no equivalent to the 24-105 (it would have to be 38-170 in order to match the angle of view of the 24-105 on a crop.), so you'll have to change your style and use different angles of view. (Other lenses, like the 17-55, 17-85, and 10-22 do have equivalent full frame lenses.)


By the way, you might also consider an automatic software solution to the distortion problem. I find that DxO Optics Pro is very good at removing distortion (and other lens aberrations) automatically. PTLens is another option.