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Keep Shooting! Photography Assignments (04 Feb 2013)

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How to get an acurrate focus on a moving subject?

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4 years 1 month ago - 4 years 1 month ago #4759 by Julie Anne Moore
I was having a hard time focusing on this little guy jumping and flying off of his perch. These are my two best shots but they are still a little off.





Any advice would be appreciated.
Last Edit: 4 years 1 month ago by Julie Anne Moore.

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4 years 1 month ago #4774 by Tim Shrimpton
A continuous auto focus mode (AF-C on my Nikon) should, in theory, track the object and adjust as needed while the object is moving. I've done tests with my son running around with mixed results. If you have any way to anticipate where the subject is going to be moving (say, a baseball player running down the baseline), you can orient yourself so that your plain of focus is parallel with the motion so that there movement won't take them out of that focused area. But with birds as you have pictured, that's pretty impossible to predict.

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4 years 1 month ago #4781 by Bill
well basically if the closer or faster the subject is the faster shutter speed you need. If the subject is moving 45 degrees to the camera you'll need approximately double the shutter speed and parallel is about 3 times the shutter speed. I have a camera app(Photo Tools by hcpl) that has a minimal shutter speed calculator on it. That was my reference for the above numbers, not sure if there are any hard and fast rules to it!
here's a link to an online calculator that should help:

johndudak.com/photographers/sp2.php#spp

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4 years 1 month ago #4782 by Julie Anne Moore
Thanks.

The shutter speeds were 350th/s and 500th/s both at f/4 and ISO 500.

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