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Old March 12, 2014, 02:20 PM   #3
Brian Pfleuger
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Join Date: June 25, 2008
Location: Austin, CO
Posts: 19,578
AO isn't "focus". Bart describes the correct procedure.

You can, in fact, use the AO as a crude range estimator by turning it one way until it's blurry, note the setting, turn it the other way until it's blurry and go to the middle. That's crude though and the AO is not meant to "focus" the image.
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