I have a Digital Rebel that I am currently using a Canon 75-300mm f/4.0-5.6 lens to shoot my kids sporting events with. I am somewhat happy with it but since I will be trying my hand in shooting local baseball games for profit then I don't think it will be enough. I have a budget up to $600.00 and I have these three lenses picked out. Any of them decent enough? Or do you have any suggestions? Thanks!!!!
Canon Zoom Telephoto EF 70-200mm f/4.0L USM Autofocus Lens
Canon Zoom Telephoto EF 75-300mm f/4.0-5.6 EF IS Image Stabilizer USM
Sigma Zoom Telephoto 135-400mm f/4.5-5.6 APO Aspherical Autofocus Lens