Projection distances by the type of projection lenses (for
• For the screen aspect ratio of 5:4 |
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Screen | Screen dimensions |
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| Projection distance (L) |
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| Zoom lens |
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size |
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Effective | Effective | |||||||||||
(inch) | ||||||||||||
| height (SH) | width(SW) | Minimum | Maximum | Minimum | Maximum | Minimum | Maximum | Minimum | Maximum | (0.8 : 1) | |
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70 | 1.111 | 1.389 | 2.17 | 2.89 | 2.92 | 4.41 | 4.42 | 7.40 | 7.41 | 11.97 | 1.13 | |
| (3'8") | (4'7") | (7'2") | (9'6") | (9'7") | (14'6") | (14'6") | (24'4") | (24'5") | (39'4") | (3'9") | |
80 | 1.270 | 1.587 | 2.49 | 3.32 | 3.35 | 5.05 | 5.06 | 8.48 | 8.48 | 13.69 | 1.29 | |
| (4'2") | (5'3") | (8'2") | (10'11") | (11'0") | (16'7") | (16'7") | (27'11") | (27'11") | (45'0") | (4'3") | |
90 | 1.428 | 1.785 | 2.81 | 3.74 | 3.78 | 5.70 | 5.71 | 9.55 | 9.56 | 15.41 | 1.45 | |
| (4'4") | (5'11") | (9'3") | (12'4") | (12'5") | (18'9") | (18'9") | (31'5") | (31'5") | (50'7") | (4'9") | |
100 | 1.587 | 1.984 | 3.13 | 4.17 | 4.21 | 6.34 | 6.35 | 10.63 | 10.63 | 17.14 | 1.62 | |
| (5'3") | (6'6") | (10'4") | (13'9") | (13'10") | (20'10") | (20'10") | (35'0") | (35'0") | (56'5") | (5'4") | |
120 | 1.905 | 2.381 | 3.78 | 5.02 | 5.07 | 7.63 | 7.64 | 12.78 | 12.78 | 20.59 | 1.94 | |
| (6'3") | (7'10") | (11'1") | (16'6") | (16'8") | (25'1") | (25'2") | (42'0") | (42'0") | (67'9") | (6'5") | |
150 | 2.381 | 2.976 | 4.74 | 6.30 | 6.36 | 9.57 | 9.58 | 16.00 | 16.01 | 25.70 | 2.43 | |
| (7'10") | (9'10") | (15'7") | (20'9") | (20'11") | (31'6") | (31'6") | (52'8") | (52'8") | (84'7") | (8'0") | |
200 | 3.175 | 3.968 | 6.34 | 8.44 | 8.50 | 12.79 | 12.80 | 21.38 | 21.38 | 34.38 | 3.24 | |
| (10'5") | (13'1") | (20'10") | (27'9") | (28'0") | (42'1") | (42'1") | (70'4") | (70'4") | (113'1") | (10'8") | |
250 | 3.968 | 4.960 | 7.95 | 10.57 | 10.65 | 16.02 | 16.03 | 26.75 | 26.76 | 43.00 | 4.05 | |
| (13'1") | (16'4") | (26'2") | (34'9") | (35'0") | (52'8") | (52'8") | (88'0") | (88'0") | (141'5") | (13'4") | |
300 | 4.762 | 5.953 | 9.55 | 12.71 | 12.79 | 19.24 | 19.25 | 32.13 | 32.13 | 51.62 | 4.86 | |
| (15'8") | (19'7") | (31'5") | (41'10") | (42'1") | (63'3") | (63'4") | (105'8") | (105'8") | (169'10") | (16'0") | |
350 | 5.556 | 6.945 | 11.16 | 14.84 | 14.94 | 22.47 | 22.48 | 37.50 | 37.51 | 60.24 | ||
| (18'3") | (22'10") | (36'9") | (48'10") | (49'2") | (73'11") | (74'0") | (123'4") | (123'4") | (198'2") | ||
400 | 6.350 | 7.937 | 12.76 | 16.98 | 17.08 | 25.69 | 25.70 | 42.88 | 42.88 | 68.86 | ||
| (20'11") | (26'1") | (42'0") | (55'10") | (56'2") | (84'6") | (84'7") | (141'1") | (141'1") | (226'6") | ||
500 | 7.937 | 9.921 | 15.97 | 21.25 | 21.37 | 32.14 | 32.15 | 53.63 | 53.63 | 86.10 | ||
| (26'1") | (32'8") | (52'7") | (69'11") | (70'4") | (105'9") | (105'10") | (176'5") | (176'5") | (283'3") | ||
600 | 9.520 | 11.906 | 19.18 | 25.52 | 25.66 | 38.59 | 38.60 | 64.38 | 64.38 | 103.34 | ||
| (31'4") | (39'2") | (63'1") | (83'11") | (84'5") | (126'11") | (127'0") | (211'10") | (211'10") | (339'11") | ||
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Note • The projection distances listed here involve an error of ±5%.
•Keystone distortions are corrected in the way the screen size becomes smaller than the original one.
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