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Old 07-07-2007, 08:09 AM   #2
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Join Date: Jan 2004
Posts: 4,861

To rundown your techniques, I'll compare them to mine (I use a 350D):

- I have the 50mm f/1.8, but it doesn't see much action.

- I use only 1 focal point. I like to prefocus (pick a spot and hold the shutter halfway down) before a train gets to where I want it and when it does, I press the shutter the rest of the way.

- Avoid AI Servo. Too much room for error and mis-focusing. Stick with the One Shot.

- For ISO, I use 200 for most of my shooting and only go to 400 or higher when it's right around sunset.

- As far as settings, you can't go wrong with 1/500s @ f/5.6 as a starting point. 18 MPH isn't that fast, so I'm guessing 1/250s would work fine. As far as aperature, my understanding is that alot of lenses don't produce the best results near the wide open side of the house. For mine, both on the Kit Lens and the 70-200mm, f/8.0 seems to be the "sweet" spot that produce the best results.

So, to sum up: ISO 100 or 200, 1/500s, f/5.6. Leave the ISO as is, and adjust the shutter and aperature from there based on the light...
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