Quote Originally Posted by MrT
But will I miss not having the extra 15mm of reach that the 24-70 offers?

Only you can answer that question; personally, I would find 55mm too short for basketball and track and field. Even the 85mm is too short sometimes. 85mm is the lens I would go for, though a lot of shots would be missed because it can't zoom.


17-55 would be great for environmental portraits and full length shots, but I would switch to the 70-200 f/4 for close ups, headshots, etc.


The 24-70 and 17-55 both have very good image quality. One is wider and the other is longer (by about the same amount on each). One big difference is that one has I.S. and is $150 cheaper. If you don't need I.S., you would be paying a lot of extra money for something you don't need. Consider the Tamron 17-50 f/2.8, which has nearly the same quality and features, but is less than half the price. (Read Bryan's review.)


Quote Originally Posted by MrT
I have seen some comments that the lower focal length L quality zoom lenses (24-70) are somewhat wasted on crop cameras.

It's true. A lot of cost and design goes into the part of the image circle that a crop camera never sees. If Canon made an EF-S 24-70 f/2.8, it would be a lot cheaper for the same level of quality.


Quote Originally Posted by MrT
If this is true then is spending $1,200 on the 24-70 a wise investment?

Yes, it's still a wise investment if it's the focal length you need. You can't help the fact that Canon doesn't make the exact lens that would be perfect for you, because you have to pick from the lenses Canon actually does make. If that means paying an extra $400 over what the "ideal" lens would cost, so be it.


Quote Originally Posted by MrT
The present says the 17-55 may be better (lower $, higher IQ?). But for versatility and the future seems to be the 24-70?

Always go with the present. At the very worst, you'll just have to sell your current choice for 20% or so of what you paid for it.


Quote Originally Posted by MrT
Also what are your experiences with "refurbished" lenses? Is the IQ better the same or worse then new lenses.

Some say that they are better since they have been through more QA. I don't know.