Getting these great shots? I don't have the targets the two of you do, but would like to be able to improve my technique when the opportunity presents itself.
It's like the old "How do you get to Carnagie Hall" joke, practice practice practice. If I take a few months off I get rusty and it takes me a day or two to get back in sync. So practice on any bird you see flying, big or small, close or far. I must have shot a million gulls, but when I see another one I can't resist.
Generally speaking, with a 500 mm it is very hard to track anything small or anything close to you, so with my lens I will zoom out to 200 for tracking and zoom in when I get an oppertuniity. That is why I love the 200-500 and Canon's 100-400. Everyone knows the 100-400 is a push pull zoom. Everyone knows the 200-500 is a twist zoom and it takes about 200 degrees to travel the full extent of the zoom. This is not easy since you must support the lens barrel with your left hand. This can make for some awkward positions. What most people don't know is that the 200-500 can also be zoomed with a push pull motion, and then you don't have to twist your left hand at all.
Getting the sun to hit you in the back of the head before you start shooting is critical to getting good BIF. Side lighting and back lighting really suck.
I have two cameras, an a330 with a wide angle and an a55 with the 200-500. I leave the 200-500 pall the time. I always leave it on the 10 fps mode. I always leave it on center spot focus. I am always prepared for any BIF moment that may occur, such as when I am driving down the road and suddenly a BIF appears. I can park, grab my camera and jump out.
If I can think of any more I will post them later, but it is my bedtime.
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Tom Seiler
My portfolio:
http://picasaweb.google.com/SeilerBird/MyPortfolio
Sony a330 Copper > Sony 18-55
Sony a55 > Tamron 200-500
Sony 75-300