Quote:
Originally Posted by VinnyP
It also largely depends if 200 is enough reach for the motorsport you shoot. I would still recommend getting a 70- 200 first and then think about replacing the 75-300 with a faster 300 F4 or F2.8 depending on your budget at the time.
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I would also recommend the Sigma 70-200 f/2.8 but as the OP's budget is limited I would say adding a 1.4x t-con if the extra reach is needed is a better idea, it won't affect image quality too much and is
alot cheaper way to get more length...
...Another lens to look at would be the Sigma 100-300 f/4, a very sharp and well built lens that I can highly recommend (I used to own one), it is a big beast though so using with a monopod would be a good idea.
If you find you don't use the 300mm end of your current lens that much then I'd definitely go for the 70-200 f/2.8 due to the faster glass.