NEC PA721X User Manual page 199

9. Appendix
Throw distance and screen size
1.
Lens types and throw distance
PA722X/PA721X/PA622X/PA621X
0.6
1.0
1.3
1.6
2.0
2.5
12.3 - 16.0
1.8 - 3.7
3.0 - 6.1
6.1 - 12.3
4
187
3.6 - 5.8 5.7 - 8.7
7.6 - 11.6
7.3 - 11.7 11.5 - 17.6
23.2 - 35.3