Samsung SP-M220 User Manual (user Manual) (ver.1.0) (English) - Page 13

Zoom and Focus Adjustment, zoom range by manipulating the Zoom Knob.

Page 13 highlights

2-4 Zoom and Focus Adjustment Zoom Knob : You can adjust the size of the image within the zoom range by manipulating the Zoom Knob. Focus Ring : Focus the picture on the screen using the Focus Ring. The size of your screen determines the distance you set your projector from the screen. If you do not install your projector at the projection distance specified in the Screen Size and Projection Distance table in Section 2-5, you will not be able to adjust the focus correctly. Installation and Connection 2-4

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Installation and Connection
2-4
2-4
Zoom and Focus Adjustment
The size of your screen determines the distance you set your projector from the screen.
If you do not install your projector at the projection distance specified in the Screen Size and Projection Distance table in
Section 2-5, you will not be able to adjust the focus correctly.
Zoom Knob : You can adjust the size of the image within the
zoom range by manipulating the Zoom Knob.
Focus Ring : Focus the picture on the screen using the Focus
Ring.