I get all of my information about photography, lenses, ect... from the internet or books. My question is how do you say some things? For example if I were to say "I am looking into getting a EF 70-200mm f/2.8L IS USM." How would I say EF 70-200mm f/2.8L IS USM in words? 70-200mm f-stop 2.8? Feel stupid asking but I don't know any other way to find out. Thanks.