Adjusting the Projection Distance
Standard Lens Throw distance ratio 1:1.8 to 2.4
NORMAL Mode (4:3) | Screen size (4:3) (X) |
| Projection distance (L) |
| Lens center to the lower edge of the screen (H) | |||||
| Diag. | Width |
| Height | Maximum (l1) | Minimum (l2) | Upper lens shift position (h1) | Lower lens shift position (h2) | ||
|
|
|
|
|
|
|
|
|
|
|
| 300 | 240 |
| 180 | 47 | 0 (14.3 m) | 36 | 2 (11.0 m) | 7 6 (228.6 cm) | 0.0 (0.0 cm) |
| 200 | 160 |
| 120 | 32 | 2 (9.8 m) | 24 | 3 (7.4 m) | 5 0 (152.4 cm) | 0.0 (0.0 cm) |
| 150 | 120 |
| 90 | 23 | 6 (7.2 m) | 18 | 4 (5.6 m) | 3 9 (114.3 cm) | 0.0 (0.0 cm) |
| 100 | 80 |
| 60 | 15 11 (4.9 m) | 12 | 0 (3.7 m) | 2 6 (76.2 cm) | 0.0 (0.0 cm) | |
| 84 | 67 |
| 50 | 13 | 2 (4.0 m) | 10 | 1 (3.1 m) | 2 1 (64.0 cm) | 0.0 (0.0 cm) |
| 72 | 58 |
| 43 | 11 | 1 (3.4 m) | 8 | 6 (2.6 m) | 1 10 (54.9 cm) | 0.0 (0.0 cm) |
| 60 | 48 |
| 36 | 9 | 6 (2.9 m) | 7 | 3 (2.2 m) | 1 6 (45.7 cm) | 0.0 (0.0 cm) |
| 40 | 32 |
| 24 | 6 | 1 (1.9 m) | 4 | 7 (1.4 m) | 1 0 (30.5 cm) | 0.0 (0.0 cm) |
| The formula for screen size and projection distance |
|
| |||||||
| l1 (Max.) = (0.0482x 0.0226) 3.28 |
| x: Screen size (diag.) (X) (inches) |
| ||||||
| l2 (Min.) = (0.037x 0.041) 3.28 |
| l: Projection distance (L) (feet) |
| ||||||
| h1 (Upper) = 0.3x |
|
|
| h: Lens center to the lower edge of the screen (H) (inches) | |||||
| h2 (Lower) = 0 |
|
|
|
|
|
|
| ||
WIDE Mode (16:9) | Screen size (4:3) (X) |
| Projection distance (L) |
| Lens center to the lower edge of the screen (H) | ||||
| Diag. | Width | Height |
| Maximum (l1) | Minimum (l2) | Upper lens shift position (h1) | Lower lens shift position (h2) | |
| 300 | 261 | 147 |
| 51 3 (15.6 m) | 39 | 5 (12.0 m) | 6 2 (186.8 cm) | 2 1 (62.3 cm) |
| 200 | 174 | 98 |
| 34 5 (10.5 m) | 26 | 5 (8.1 m) | 4 1 (124.5 cm) | 1 4 (41.5 cm) |
| 150 | 131 | 74 |
| 25 11 (7.9 m) | 19 11 (6.1 m) | 3 1 (93.4 cm) | 1 0 (31.1 cm) | |
| 133 | 116 | 65 |
| 23 0 (7.0 m) | 17 | 7 (5.4 m) | 2 9 (82.8 cm) | 10.9 (27.6 cm) |
| 106 | 92 | 52 |
| 18 3 (5.6 m) | 14 | 0 (4.3 m) | 2 2 (66.0 cm) | 8.7 (22.0 cm) |
| 100 | 87 | 49 |
| 17 0 (5.2 m) | 13 | 1 (4.0 m) | 2 1 (62.3 cm) | 8.2 (20.8 cm) |
| 92 | 80 | 45 |
| 15 10 (4.8 m) | 12 | 1 (3.7 m) | 1 11 (57.3 cm) | 7.5 (19.1 cm) |
| 84 | 73 | 41 |
| 14 1 (4.3 m) | 10 10 (3.3 m) | 1 9 (52.3 cm) | 6.9 (17.4 cm) | |
| 72 | 63 | 35 |
| 12 0 (3.7 m) | 9 | 3 (2.8 m) | 1 6 (44.8 cm) | 5.9 (14.9 cm) |
| 60 | 52 | 29 |
| 10 2 (3.1 m) | 7 10 (2.4 m) | 1 3 (37.4 cm) | 4.9 (12.5 cm) | |
| 40 | 35 | 20 |
| 6 6 (2.0 m) | 5 | 0 (1.5 m) | 9.8 (24.9 cm) | 3.3 (8.3 cm) |
| The formula for screen size and projection distance |
|
| ||||||
| l1 (Max.) = (0.0525x 0.0546) 3.28 |
| x: Screen size (diag.) (X) (inches) |
| |||||
| l2 (Min.) = (0.0404x 0.0397) 3.28 |
| l: Projection distance (L) (feet) |
| |||||
| h1 (Upper) = 0.2451x |
|
| h: Lens center to the lower edge of the screen (H) (inches) | |||||
| h2 (Lower) =0.0817x |
|
|
|
|
| |||
Setup & Connections
•There is an error of 3% in the formula above.
•Values with a minus () sign indicate the distance of the lens center below the bottom of the screen.
