Advice for set up of Canon 40d af

[swoosta]

Hi
Just been taking some photos of horses. They are hard to get in focus and I was a bit disappointed with some of the shots. What is the best AF point to select for moving objects. i had it on the centre. I also had the focus on servo.
thanks

[wave01]

hi can we see some and whats wrong with them. it may help

[swoosta]

http://www.flickr.com/photos/swoosta/

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[dan123]

I looked at the Exif info on the first, you need a faster shutter speed, thats why, the 1/50th it showed will result in blurry images of fast moving subjects, youd need at least a 200th to freez the action appropriately,

Dan

[KeithT]

The minimum shutter speed should be 1 over the focal length of your lens for hand-held photography but at least 1/200sec or faster. I would suggest you use centre focus and set AF mode to AI Servo which will help you track any movement of the subject.

[swoosta]

Thanks for the help people

[swoosta]

Originally Posted by KeithT

The minimum shutter speed should be 1 over the focal length of your lens for hand-held photography but at least 1/200sec or faster. I would suggest you use centre focus and set AF mode to AI Servo which will help you track any movement of the subject.

What do you mean by 1 over the focal length?

[GeoffWessex]

Keith means.... if the focal length is, say, 75mm, "1 over" would be 1/75th of a second, so don't go slower than that with the shutter speed; if the focal length were 250mm, put a 1 over it and it becomes 1/250th of a second, and so on. For any given focal length, the minimum recommended shutter speed (handheld) would be the focal length, converted into fractions of a second.
With a newer camera, with Vibration Reduction, Anti-Shake etc, you can probably go one stop slower than that, but it's always good to use the fastest shutter speed you can get away with, bearing in mind your requirements for the ISO and Aperture.

[swoosta]

Got it - thanks

[KeithT]

I apologise for not being clearer, but Geoff has now put you right on that. Good luck with your photography and I hope you get some great shots.