Pentax PENTAX-D - How to Use the Infrared Index

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3. Using Manual Focus
Set to MF with the camera’s focus mode, and turn the focusing ring to focus manually.
• If the lens is used with a camera, you must set the focus mode switch to MF before
you focus manually.
Note:
When focusing manually, do not turn the focusing ring all the way to infinity or
to the minimum focusing distance.
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