I was thinking about picking it up for $110 on amazon, I don't really need the lens but for the price it would be nice to have a prime in my bag. here is the lens link does anyone have any experience with the lens? I was going to use it for indoor shots, and for taking some action shots like people skateboarding and such because of its speed, for the price is it worth it? Or for what im looking to do should I just go with the 1.4 here? this is for a D90 btw.