Not to throw this thread off topic too much, but I simply must comment on Jim's gallery. Stunning, simply stunning. The clarity of the shots is just incredible.
I road race at PIR with the SCCA (amateur), as well as Seattle, Bremerton, and Mission BC. I just bought my wife a 300D for use during my races, and we are looking for an affordable zoom lens that would work for those tracks. I realize the quality lens cost $$$, but we are just starting out with this action type photography. Not to mention I am a racer first, and wannabe photographer second. A thousand dollars buys me another set of race tires for next year.
So, I would like to keep the price at no more then $1000 if possible. I am vacillating between the sigma 70-200 2.8 ex apo w/ 1.4 extender, or possibly the sigma 100-300 F4 EX maybe w/ extender also.
I would like to use this lens for my sons soccer games as well as the auto races. Trying to decide if a 2.8 lens is required here in the oftentimes dark pacific northwest. I would like to have more reach then the 200, but if 2.8 is required for a quality shot I guess I'll just have to give up the reach. This lens would be used for wildlife photography as well, but this would be a secondary consideration.
Also, while I have raced at PIR plenty, I've never walked around to scope out potential photography locations. Are the locations you pro's use restricted, or are the amateurs allowed to use them as well? I am not so much concerned with the pit shots as I have access to all those areas. But I was wondering where are some good track-side locations, like maybe down by the chicane? I also realize the rules and such may very well be different for the professional races you shoot, and the amateur stuff we are doing.
Any guidance you could provide would be much appreciated. If this is too much OT for this thread you could respond via email if you like.