I'm deciding between 2 lenses here
1) Sigma APO 70-200mm F2.8 EX DG HSM ($1399 quoted by MS)
2) Tokina AT-X 828 AF PRO 80-200mm F2.8 ($980 - MS)
1st question: What's the difference between the above 2 to justify the ~$400 difference?
Will be using a D50 body.
Mainly using for sports photography (soccer to be precise).
I've read several threads here regarding the lenses I've mentioned above. Most ppl commented that a constant F2.8 will be very useful for indoor/event shooting but I won't be shooting indoors that often, mostly outdoors.
So do you guys think i should save some money by buying a cheaper non F2.8 telezoom lens? eg. Sigma 28-200mm F3.5-5.6 DG
Will this lens be sufficient for my sports shooting?
I don't mind getting a 2nd hand lens.
Comments are greatly appreciated