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EF 75-300MM F/4-5.6 III USM (2)
 
 
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CMS-XML How to manually focus the lens.
The lens must be switched to manual focus (M) on the AF / M selector switch. You can then look through the viewfinder and adjust the focus by turning the manual focus ring and adjusting it till the image is sharp and the green focus indicator ball, in the lower right corner of the viewfinder lights up.
CMS-XML EF75-300mm f/4-5.6 : How to set the Focus Mode.
Setting the Focus Mode To set the AF mode, set the focus mode switch to AF . To disable the autofocus mode and focus manually, set the focus mode switch to MF and turn the focusing ring.