We swam from the Starfish and the Sand Dollar Cabanas and we're close to the shore. Honestly, with a zoom lense you could get ok shots. The only problem is that you've got 3 groups in one area going at the same time so don't expect a clear shot. The photographers do an excellent job on close-up pics (kissing the dolphin, posing with a full length dolphin shot and the ride ) so don't fear, it'll work out.
The video is nice too and is a must do if you can afford it.
still my advise,,,,,, don't miss out and swim with her. It's an incredible experience and it's nice to be together during the pod experience so you'll have somebody to talk to and say...look at that....ooooohhh....ahhhhhh !