I'm choosing between 135L and 85L for portrait, especially full body portrait and low light, for both FF and crop. I don't shoot sports, at least very rarely. I'm leaning towards 85 L at this moment because 135L is too long for my 60D, it's even a bit long on FF for full body, requires a fair bit of distance to work with. The main concern I have about 85L is the AF speed and the super thin DOF at 1.2, but I guess for shooting portrait AF shosld be ok.
One thing I hear about 85L is that I can use it on 60D and get a similar result as 135L on FF, is it true?
Another question, if I do get 85L, in order to use it wide open at day time, I 'm thinking about getting a 3 or 4 stop ND filter. Is it o k?
Any suggestion will be appreciated.