I have a 70-200 F/2.8 IS - it is a fantastic performer - versatile, great IS unit, I'm genuinely pleased with all aspects of its performance. I'm not here to debate the merits of one lens over another, however I'm struggling to decide whether to keep it or not and could use some feedback for the sake of my sanity.
I am using the 70-200 on both FF and crop bodies. Unfortunately due to the size/weight of the F/2.8 IS it stays at home much of the time. I bring the 70-200 when I know a job will need the fast aperture and/or IS, or when a shoot will demand the flexibility of the zoom and something longer than 100mm. I do not bring the 70-200 when doing casual shooting or personal project work as it is too cumbersome. Outside of wedding work the 70-200 is mostly shot at F/3.5 or smaller - so I carry the weight/size/cost premiums for a small percentage of time when I need the F/2.8 aperture.
Since there is nothing worse than a lens that stays in the bag or at home I am considering making a change to the 70-200 F/4 IS (smaller, IS is a must) which can be carried with much more frequently + 135mm F/2 for when I need the faster aperture.
Does this make sense? Can anyone see any shortcomings or reasons not to do this? My only concern is with wedding/event shooting - I know there are a number of folks working with the 135L or 200L for this kind of coverage. I'm wondering if a fast standard zoom and something like the 135 can handle this sort of work.
Thanks for the input all!