Throw Distance
D-2
Roadster & Mirage S+/HD User Manual
020-100002-04 Rev. 1 (12-2008)
Figure D-1 provides the recommended throw distance formulas for each of the
“Compact” Thunder Lenses. Pre-calculated throw distances for the complete range of
lens types and screen sizes appear in the charts and graphs on the following pages.
Refer to these examples to quickly determine the proper throw distance (±5%) for
your installation and lens.
Table D-1. Throw Distance Formulas
Lens Throw Ratio
Throw Distance Formula Inches (cm)
Screen Diagonal Inches (cm)
Screen Width Inches (cm)
Min.
Max.
Min.
Max.
0.73 SX+
0.7588 x screen width + 12.29 (31.21)
67.8 (172.1)
197.4 (501.4)
59.1 (150)
172 (437)
1.2:1 (
short throw
) SX+
1.2865 x screen width + 3.94 (10.0)
54.2 (137.7)
135.5 (344.2)
47.2 (120)
118 (300)
1.2:1 (
long throw
) SX+
1.2487 x screen width +5.38 (13.58)
135.5 (344.2)
677.6 (1721)
118 (300)
590 (1499)
1.45-1.8 SX+
1.4781 x screen width +7.71 (19.58)
1.839 x screen width + 8.42 (21.39)
71.8 (182.4)
57.4 (145.7)
500.5 (1271.1)
401.6 (1020)
63 (160)
50 (127)
434 (1103)
350 (889)
1.8-2.5 SX+
1.8301 x screen width – 2.29 (5.83)
2.6019 x screen width – 5.22 (13.25)
72.7 (184.7)
52.4 (133.1)
501.9 (1274.7)
361.4 (917.9)
63(161)
46 (116)
437 (1111)
315 (800)
2.5-4.5 SX+
2.6147 x screen width – 2.29 (5.83)
4.7718 x screen width – 10.2 (25.91)
110.2 (280)
61.4 (156)
505.9 (1285)
501 (1274.7)
96 (244)
54 (136)
440 (1120)
437 (1111)
4.5-7.3 SX+
4.5727 x screen width – 3.56 (9.05)
7.4058 x screen width – 8.65 (21.97)
120.6 (306.3)
74.1 (188.2)
501.9 (1274.7)
495.1 (1257.5)
105 (267)
65 (164)
437 (1111)
431 (1096)
0.67 HD
0.7058 x screen width + 3.6025 (9.150)
66.78 (169.61)
200.79 (509.99)
58.2 (134.1)
175 (444.5)
1.1:1 FP HD
1.1940 x screen width + 4.0492 (10.285)
42.8 (108.7)
73.09 (185.64)
37.3 (94.74)
63.7 (161.8)
1.1:1 RP HD
1.1447 x screen width + 5.1343 (13.041)
114.62 (291.13)
588.01 (1493.6)
99.9 (253.7)
512.5 (1301.8)
1.38 – 1.84 HD
1.3834 x screen width + 3.0369 (7.7137)
1.8835 x screen width + 2.6946 (6.8842)
129.19 (328.15)
95.0 (241.3)
710.09 (1803.6)
574.48 (1459.2)
112.6 (286)
82.8 (210.31)
618.9 (1572)
500.7 (1271.8)
1.84 – 2.58 HD
1.8971 x screen width – 2.5791 (6.5509)
2.5974 x screen width – 2.2662 (5.7561)
97.64 (248.0)
71.14 (180.68)
573.9 (1457.7)
419.01 (1064.3)
85.1 (216.2)
62 (157.48)
500.2 (1270.5)
365.2 (927.61)
2.58 – 4.15 HD
2.4591 x screen width + 12.577 (31.9456)
4.1120 x screen width + 10.2889 (26.1338)
161.89 (411.2)
97.41 (247.42)
821.38 (2086.3)
491.87 (1249.3)
141.1 (358.39)
84.9 (215.65)
715.9 (1818.4)
428.7 (1088.9)
4.15 – 6.74 HD
4.0813 x screen width + 12.018 (30.5257)
6.8869 x screen width + 12.07 (30.6578)
129.88 (329.89)
76.87 (195.26)
882.54 (2241.6)
522.96 (1328.3)
113.2 (287.53)
67 (170.18)
769.2 (1953.8)
455.8 (1157.7)
NOTES:
Ensure HORIZONTAL screen size is used in all formulas.