hey guys im new to the site. I just got into the photography scene and had some questions hopefully someone could answer. Im currently in hawaii and looking to take some pics of the surf with my olympus evolt e500. IM looking for a telephoto lens to get some shots of surfing on some outer breaks from the beach. I was told i dont have to use the olympus brand lenses and could use others such as sigma tamron, vivitar, etc. Could someone please tell me if this is true and also would i need some kind of adapter to mount the lens to my camera. Im sorry for the non photography terms please correct me and let me know the proper names of the equipment so i can learn. Oh and how should i go about choosing a lens. thanks for all the help. have great day!!!!!