Samsung SPA400BX-XAA - Manual (Page 19)

You can adjust the size of image within zoom range by manipulating the
Zoom Knob.
Focus the picture on the screen using the Focus Ring.
If your product is installed at a location out of the specified projection
distance (refer to Screen Size and Projection Distance ), the focus cannot
be adjusted correctly.
Leveling with Adjustable Feet
For level placing of the projector, adjust the Adjustable Feet of the projector.
You may adjust the level of the projector up to 12 mm (average 3.4°) degrees.
Depending on the position of the projector, Keystone distortion of image may appear.
Screen Size and Projection Distance
Install the projector on a flat, even surface and level the projector using the adjustable feet to realize optimal picture quality. If
images are not clear, adjust them using the Zoom Knob or Focus Ring, or move the projector forward and backward.
Screen size
(M:inch)
Horizental Vertical Max Min Offset
(X:mm) (Y:mm) (Z:mm) (Z:mm) (Y':mm)
10 218 131 392 326.7 11.1
20 436 261 784.1 653.4 22.2
30 653 392 1176.1 980.1 33.3
40 871 523 1568.2 1306.8 44.4
50 1089 653 1960.2 1633.5 55.5
60 1307 784 2352.3 1960.2 66.6
70 1525 915 2744.3 2286.9 77.8
80 1742 1045 3136.4 2613.6 88.9
90 1960 1176 3528.4 2940.3 100
100 2178 1307 3920.5 3267 111.1
110 2396 1438 4312.5 3593.8 122.2
120 2614 1568 4704.5 3920.5 133.3
130 2831 1699 5096.6 4247.2 144.4
140 3049 1830 5488.6 4573.9 155.5
150 3267 1960 5880.7 4900.6 166.6
160 3485 2091 6272.7 5227.3 177.7
170 3703 2222 6664.8 5554 188.8
180 3920 2352 7056.8 5880.7 199.9
190 4138 2483 7448.9 6207.4 211.1
200 4356 2614 7840.9 6534.1 222.2
210 4574 2744 8233 6860.8 233.3
220 4792 2875 8625 7187.5 244.4
230 5009 3006 9017.1 7514.2 255.5
240 5227 3136 9409.1 7840.9 266.6
250 5445 3267 9801.1 8167.6 277.7