Hey guys and gals, I have been getting into sports photography over the course of the basketball season and i am looking to get more serious about sports photography for some more upcoming sports season baseball, football, etc. So right now i am shooting on a Nikon 50 f/1.8 (That I am Borrowing) and that has served me pretty well for the basketball season, i had to do a lot of cropping. I was wondering if i should keep buy a 50 f/1.8 or go towards a few other options. Those other options would be a Nikon 85 f/1.8, Tokina 50-135 f/2.8, Sigma 50-150 f/2.8, Sigma 70-200 f/2.8. So what do you think i should go for?