I'm excited to say I just purchased a used 100-400L to use at the upcoming air race in Detroit. This will be my first time shooting moving objects with a telephoto and I've got a few basic questions. I will be seated along the Detroit river, shooting towards Windsor. Should have no problem getting right up front. I also just got a design engineering job with a small aircraft manufacturer (Thrush Aircraft) and would like to start using this lens to photograph the planes we build. For now I'm focused on the Air Race...
1. Prop Blur: Did some searching and couldn't find much info on propeller diameter or RPM. Also wasn't able to determine whether these guys are flying fixed pitch or constant speed props. I would assume that the typical shutter speed 1/200 or so would be a good place to start... Any thoughts?
2. Shooting Mode: The review screen has been very misleading in the past and I'm still unable to consistently judge exposure using the histogram. I plan to start with Tv at around 1/200 and will adjust ISO to get my aperture to around F8.0 or more. Thoughts on stopping down more if I can get away with it? I'd like to keep the ISO at 800 or less. I hope this won't be a problem. Most of the racing happens at mid day.
3. Metering Mode: This has me a bit stumped... Spot? Partial? What are you guys using?
4. Focus mode: AI servo seems like the obvious way to go here. Especially with the 1D and 100-400L combo, which is supposed to focus very quickly/accurately. Any to reason to take it out of servo mode and try something else? These things will be going fast.
Thanks in advance for you helpful advice!