Crapking said:The 'slow' AF is way over-rated and talked about by those who don't actually shoot with it. I regularly use it with the 1dIV and 5d3 to shoot indoor volleyball and while hit rate is lower than 70-200, it is definitely usable for fast-action (if you have any sense of timing and are willing to shoot mulitple frames).
As for its' portraiture value, it is unsurpassed in sharpness, even wide open if you place your focus point properly.
As to the OP's original 'prime' question, since he has the 24-104 range covered, I'd cast my vote (again) to the 135...
+ 1
The 135L is Unreal
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