I have read all of the stickied articles and searched across the net about primes vs zoom, etc.
In the past month I have become the unofficial "official" photographer for my wife's roller derby team. Shooting fast sports combined with a low-light indoor setting has surpassed the limits of my 17-85mm and 70-300mm lens. Even when I use my 580EXII flash I can't get enough light, etc to catch a good shot of the action. For the past 2 bouts I have been relegated to using my 50mm 1.8 as it is the only lens that gets enough light for a good shot. BUT.....it's still slow to focus. So, I put all my lenses up on eBay and have decided to go for quality.
Right now I'm thinking that the 24-70mm 2.8L is my best bet, but a friend who is a professional photographer suggested I get a 50 1.4 and 85 1.8 instead to use. My problem with this is that I sit track-side for the photos and depending on where the action is during the roller derby I feel that the zoom would be better to allow me to get the shot. Switching primes depending on where the action is on the track would be really difficult during a bout.
Would the 24-70 be fast enough? Or are the primes listed above faster and necessary?
What does everyone think?
As a side note, do you think that a monopod would be a good idea to help stabalize the photos since the 24-70 has no IS. (recommendations?)