Samsung Schneider D-XENON 100 Macro - Manual (Page 14)

《12》
Using the Quick-Shift Focus System (GX -series cameras only)
If you use the lens with an GX -series camera and the focus mode is set to autofocus,
you can focus manually after autofocus is achieved. Just turn the focusing ring to
manually touch-up the focus. You can do this without changing the focus mode to MF.
How to use the Quick-Shift Focus System
1. Using Autofocus
Set the camera’s focus mode switch to autofocus, then press the shutter button
halfway to autofocus.
With the GX camera set as explained by “Focusing with the OK Button” on page 9,
you can focus by pressing the OK button.
2. Hold down the shutter button halfway (or hold down the OK button) and
then turn the focusing ring to focus.
※ You can focus the subjec with the OK button (GX-1S / 1L) and the AF button (GX-10).
3. Finally, press the shutter release button fully to take a picture.