Originally posted by gm4life I second this! What a great piece of glass the 20-40 is.
Oh good grief MORE lenses?
Well, I'll post pics in a few days but my gut feeling, just from walking around with both, is that the 21 is more useful for what I need to do. I do like that the 15 allowed me to take nice images of wide trees, for example, from where I happened to be standing, vs the 21 where I had to back up a bit. But then again I have 2 feet and can do "foot zooming" easily enough.
It might be my imagination but the 21 also seems "brighter" (and I'm not talking about 3.2 vs 4). I'm shooting just in JPG to save time.
And just to add a bit more to the mix, if my 18-55 were REALLY good glass, this debate would be over.