Epson 821 사용자 설명서

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Installation
Screen Size and Projection Distance
The distance between the projector's lens and the screen determines the 
actual image size.
While referring to the following table, position the projector so that the 
images are projected onto the screen at the optimum size.
The values should be used as a guide for setting up the projector. The 
actual values will vary depending on projection conditions and the zoom 
setting.
 
EMP-821
Recommended distance
86–1473 cm (2.8–48.3 ft.)
Units: cm (in.)                     Units: cm (ft.)        Units: cm (in.)
4:3 Screen size
Projection distance 
Distance from 
centre of lens 
to bottom edge 
of screen 
 
Shortest 
(wide)
Longest 
(tele)
30"
61 ×
 46 
(24.0 × 18.1)
86 (2.8)–142 (4.7)
4 (1.6)
40"
81 ×
 61 
(31.9 × 24.0)
117 (3.8)–192 (6.3)
6 (2.2)
50"
100 ×
 76
 (39.4 × 30.0)
147 (4.8)–241 (7.9)
7 (2.7)
60"
120 ×
 90
 (47.2 × 35.4)
178 (5.8)–290 (9.5)
8 (3.3)
80"
160 ×
 120
 (63.0 × 47.2)
239 (7.8)–389 (12.8)
11 (4.4)
100"
 200 ×
 150 
(78.7 × 59.1)
300 (9.8)–487 (16.0)
14 (5.5)
200"
410 ×
 300 
(161.4 × 118.1)
604 (19.8)–980 (32.1)
28 (10.9)
300"
610 ×
 460 
(240.2 × 181.1)
909 (29.8)–1473 (48.3)
42 (16.4)
EMP-81/61
Recommended distance
87–1094 cm (2.8–35.9 ft.)
Units: cm (in.)                     Units: cm (ft.)        Units: cm (in.)
4:3 Screen size
Projection distance 
Distance from 
centre of lens 
to bottom edge 
of screen 
 
Shortest 
(wide)
Longest 
(tele)
30"
61 ×
 46 
(24.0 × 18.1)
87 (2.8)–104 (3.4)
4 (1.6)
40"
81 ×
 61 
(31.9 × 24.0)
117 (3.9)–141 (4.6)
6 (2.2)
50"
100 ×
 76
 (39.4 × 30.0)
148 (4.9)–177 (5.8)
7 (2.7)
60"
120 ×
 90
 (47.2 × 35.4)
179 (5.9)–214 (7.0)
8 (3.3)
80"
160 ×
 120
 (63.0 × 47.2)
240 (7.9)–287 (9.4)
11 (4.4)
100"
 200 ×
 150 
(78.7 × 59.1)
301 (9.9)–361 (11.8)
14 (5.5)
200"
410 ×
 300 
(161.4 × 118.1)
608 (19.9)–728 (23.9)
28 (10.9)
300"
610 ×
 460 
(240.2 × 181.1)
915 (30.0)–1094 (35.9)
42 (16.4)