Canon 24-105mmL f2.8
I'm a Canon guy though I think this applies equally to Nikon. I've often wondered why Canon don't produce a Canon 24-105mmL f2.8 and assume it is because it would be to big and heavy. Has anyone figured out what size it would have to be? and what about an f3.5, a compromise, so as to speak? Or a 24-85mm? I wonder at what size and weight the companies consider it impractical. A Canon 24-105mmL f2.8 would be so useful in theory.
because ... http://forums.dpreview.com/forums/post/50288945
Unapologetic Canon Apologist