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Old Feb 2, 2007, 10:28 PM   #1
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I've got a KM5D.When trying to capture sportsaction, I hold the shutter release button 1/2 way to engage the autofocus, then hold thatfor long time waiting for the right moment. By a long time, I mean for 30-90 seconds, repeatedly, as long as fingers can take it.

1. Will this shorten the life of the mechanism?

2. Does it drain a lot from the battery?

Thanks in advance.

Scott
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Old Feb 3, 2007, 12:08 AM   #2
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Old Feb 3, 2007, 6:39 AM   #3
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1. If you're using Single-Shot Autofocus ("AF-S" on the "Fn" menu), then pressing the shutter release 1/2 way down engages "Focus Lock". If while you're holding down the shutter release, your subject moves, it could be out of focus.

2. If you're using Continuous Autofocus ("AF-C" on the "Fn" menu), then the camera is constantly focusing, even when you're NOT holding down the shutter release, so pressing the shutter release 1/2 way down doesn't do anything with regard to focusing (it will continue to activate the Auto Exposure feature.) But Continuous Autofocus will drain the battery needlesslyif you're not actively composing shots.

Also, pressing the shutter release 1/2 way down prevents the camera from going into Auto Power Save mode, but you probably want that.
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