I have a question may be a bit off topic. I have the 85mm f/2 lens and heard a lot of recommendation about the much more expensive 85mm f/1.4. I am wondering if the f/1.4 lens is better at say f/11, f/8, f/5.6 etc..? I never use my lens at f/2 or even 2.8 due to my preference for depth of field so do I benefit from the f/1.4 lens?