If you have the opportunity to borrow a lens that you are interested in purchasing I recommend it so that you know what you are buying since it is an investment for you and if you are like me you don’t like to waste money on gear that you do not need or perform as you expected. You can also rent camera equipment check with your local supplier. Or join a local photography group where maybe one of your fellow photography friends have the gear you are looking into. Here in Dubai the monthly meeting for the local photography enthusiasts are meeting tomorrow evening. Check out http://www.uae-photo.com/ for more information.
Happy shooting everyone.