I am really struggling with this one, I am not sure what to do. I just found out from a friend of mine that he is trying to sell his lenses because he mostly uses his 24-105, and all the other lenses he owns have been sitting in his camera bag. One of these lenses is a rather new Canon EF 24-70mm that he said would be willing to sell me for $800, because we are friends. Here's my dilemma: do I need it and can I afford it? I also have a 24-105 that I use on my 50D. Is it worth getting this lens only to gain an extra f-stop? I also recently purchased a new 70-200, and I am not sure I want to dish out an extra $800 for a lens I may not need. Any advice on pros and cons would be appreciated, because I am not sure what to do with this one. I almost wish he had not told me about it 





