A used sigma 70-200 f28 . will do the trick for that kinda sport and is about on budget
f28 that'll be painful to use
I'd second that though!![]()
oops one full stop makes all the difference... f2.8 of course![]()
oops one full stop makes all the difference... f2.8 of course![]()

one full-stop thoughF/2.8 to f/28 is more than one stop![]()
![]()
one full-stop though
that L glass is apparently very sharp but not that cheap
have you used the Canon 70-300 IS as an alternative to the sigma? no macro but...