I don't get why there is all this fuss over the 17-55 when I've always thought the 16-35 is a joke lens. 2 x zoom, no sharper than the 17-40, twice the price! Come on?! In relation to that the 17-55 is a bargain.
The 17-55 is a expensive, and it is should come with a hood -- really stupid mistake by Canon. However, it's very sharp right across the picture and is a great focal range for me. The 17-40 is great for landscapes but too slow indoors/events. I love my 50 f/1.4 but it's not wide enough for the uses I would like; I like my Tamron 28-75 f/2 but it's not quite enough, and not fast enough sometimes.
So here comes the 17-55 that is wide enough, fast enough (particularly with IS) and sharper than anything else. It replaces the 17-40, 28-75 (almost) and I haven't put on the 50 f/1.4 since getting it.
If you just want landscapes then the 17-55 is not for you.
Malcolm


