I'm thinking of purchasing the 135mm f2 L, but wondering if I really need to. I found one second hand which is only a little more than double the price of the 85mm f1.8 brand new. Use, wedding photography and I'm anticipating doing some gigs as well. I know the 135mm has a very close focusing distance, like 90cms. I have just never used either of them long enough to make a kind of informed decision. Nobody please suggest the 85 f1.2 L, out of my price range. I have the 24-70mm L so the difference between 70mm and 85mm I'm thinking isn't that much, hence the reason for leaning towards the 135mm. My camera is full frame.