Much thanks, I figured you were busy. These look good to me in the edges at the focused length and even the unfocused borders (depth of field) look good.
Thanks very much, this makes me less wary and more happy if I go this way, because a decent lens with fast focusing and good clarity etc is what I am after, because I will be doing some fast sport like you (including horse racing).
It is only a hobby, so spending 2,100+ for the top of the line does not make much sense, even though from what I see one could sell such as the Nikon VRII after a couple years for not too much loss, if one wished.
Also, its my only real hobby now (apart from reading and running lol), so spending on equipment is not as bad as some people who spend with golf clubs and fees, etc etc. so spending on a lens may not be so bad if its my only 'thing'.
But at this time this Sigma looks like a good approach.
I spent a bit of time shooting yesterday and found that I was at the 200mm of the 18-200 quite a bit, and cropped in some too.
So, might get a 300 f4 or some such later on )I am not a huge fan of teles, though they may do their job, Do you use a teleconverter and how do you find the result?
Much thanks again for taking the time!
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.....Just from an amateur......