I bet that lens will come in handy for runway shoots.
What's the max aperture on the 24-105IS and on the 28-135IS? What do you think of their optics? How much do they weigh? How fast do they focus?
I've been thinking that a little wider focal range than my 24-70, with IS, could come in handy for wedding work... especially if it was lighter than the 24-70 and lighter than the 70-200IS.
It does come in handy for runway and hockey photos. I finally got to use the focus limiter switch when I shot hockey games earlier this year. It kept the lens from trying to focus on the plexiglass.
The 24-105/4 IS L is an f/4 and the 28-135 IS is a 3.5-5.6
The 24-105($1100) is weather sealed and built like a tank, but still lighter than the 24-70/2.8. The 28-135($400) is not sealed and is pretty light, it makes a good walk about lens. The L lens has the edge in all regards IQ, durability, etc.
