Serious help is needed here.
I mainly shoot sport and portraits (with FF !). Kind of sports : swimming, cycling and running. Triathlon in fact, so mainly outdoor but when some races continues when the night fall and sometimes in pool where the light is "difficult". Big apertures is usefull for light but because I love thin DOF too.
I had 3 70-200s : the f4, f4IS and f2.8. I loved all the f4s. I only tried to shot races with the f2.8 version. And I found the AF of the 2.8 slow and often miss my focus. Maybe my copy had a problem ? And the f2.8 (got 2) were not as good at 2.8 then f4 were at f4. So I sold the f2.8 and I'm on the point to sell my 135L. But due to € crash I want to reduce my gear and I'm confused between 2 options :
-selling my 135L and get this called "fabulous 70-200 mk2"
-keep the 135L and get a 70-200/4IS
Option 1 is 210€ more expensive, not so much in a way.
Please don't tell me I don't need IS. I have it on 24-105 and absolutely need it !
Now, I'm debating between 70-200/4IS (and keep my excellent 135L) and 70-200/2.8IS2.
According to you, wich one have the fastest AF on 5D2 ?
PS : I never tried to shot a race with the 135L where I think zoom is most usefull