Anybody?
It's a good start. Not ideal, but start with what you have. On the 7D you'll have an equivalent to a 100-300mm lens, which is fine for infield coverage. The 7D should be quick enough at focus and shooting speed, too.
A couple of suggestions:
1. Try to shoot from the end of the dugout on the first base side, a little past first base. There is often a photographer's position ("well") there. This lets you shoot action at home plate (right-handed batters and defensive plays at the plate), first base (pickoff attempts), second base (double play attempts and normal defensive plays), and some side-angle shots of left-handed pitchers. You can also shoot the short stop in action, and possibly some defensive play in shallow right field.
2. WATCH OUT FOR FOUL BALLS. You can be seriously injured. NO CHIMPING when there is a batter in the box.
3. If you want peak action like bat-on-ball or the pitcher throwing, be prepared to shoot a lot of pictures and have most of them come up empty. Not a big deal, it's only pixels. (Buy large memory cards.)
4. Shooting from the third-base side gives you a good look at right-handed pitchers, and left-handed batters. You can usually move around between innings.
Hope this helps.
