I used to own the 100-300 f4 and think it is a very good lens, personally I'd think long and hard before getting rid of it. Fast focus, great image quality and takes the 1.4x tc really well, not many in the same price bracket can claim the same. I only parted with mine as I had the chance to swicth it and another lens that I never used for a 100-400 IS and a Sigma 70-200 f2.8. If anything I think the 70-200 f2.8 is lightly better (though less reach), if the 50-150 f2.8 is anywhere near the same quality (in such a light package) then it could be a very good option (though that is a lot less reach)...
|