Whats a good indoor sports, telephoto lens?
I wonder if a good general outdoor telephoto lens would be better...
Depends on how you define telephoto. Some people might say the 100mm 2.0 and 135mm 2.0 lenses are telephoto. Do you want something longer? then you're into serious cash (think $4000). DOn't confuse telephoto with zoom. They're not the same thing. If you really meant zoom, then the answer depends on the sport. A 70-200 2.8 is a nice lens if you are allowed to use flash (in ohio you can use fash for basketball or wrestling but not for volleyball or gymnastics). If you can use flash then I recommend the 580EX paired with 70-200 2.8