Mmm was pretty set on getting a 85 1.4 but have been looking into the 105 after hearing people mention it on here.Very impressed with the 105 and the DC could be added fun. I must admit the extra length is appealing although its a tiny bit slower than the 85mm. What would be the quickest to focus out of these 2 lenses? Would either be good for low light sports? Feel free to post examples..cheers