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Photography Q&A
Overriding Auto Focus?
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<blockquote data-quote="wornish" data-source="post: 402224" data-attributes="member: 15434"><p>Some lenses have a two position switch labelled M/A - M</p><p>Others have a three position switch labelled A/M - M/A - M</p><p></p><p>In both types if the switch is set to M then it only focusses manually and the camera autofocus does not work</p><p></p><p>If set to M/A then the camera will autofocus but manual focus adjustment is still possible and will prioritise over the auto.</p><p>If set to A/M then again camera will autofocus and manual focus adjustment is still possible but you have to move the focus ring some way before the autofocus is overridden. This prevents accidental changes to focus caused by unintended operation of the focus ring.</p><p>In both cases the focussed can be manually adjusted even if the shutter is half pressed or AF-On is pressed. </p><p></p><p>I can't find any ref in my cameras user guide that says you can cause any damage by manually adjusting the focus whilst the camera is set in AF. Why bother having the manual switch on the lens if thats the case? Most people would forget to switch the camera back to Manual as well.</p></blockquote><p></p>
[QUOTE="wornish, post: 402224, member: 15434"] Some lenses have a two position switch labelled M/A - M Others have a three position switch labelled A/M - M/A - M In both types if the switch is set to M then it only focusses manually and the camera autofocus does not work If set to M/A then the camera will autofocus but manual focus adjustment is still possible and will prioritise over the auto. If set to A/M then again camera will autofocus and manual focus adjustment is still possible but you have to move the focus ring some way before the autofocus is overridden. This prevents accidental changes to focus caused by unintended operation of the focus ring. In both cases the focussed can be manually adjusted even if the shutter is half pressed or AF-On is pressed. I can't find any ref in my cameras user guide that says you can cause any damage by manually adjusting the focus whilst the camera is set in AF. Why bother having the manual switch on the lens if thats the case? Most people would forget to switch the camera back to Manual as well. [/QUOTE]
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Photography Q&A
Overriding Auto Focus?
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