I am wondering what the ratio of distance to screen and screen size is? I am struggling to find the calculators everyone keeps mentioning and my projector comes tuesday. Can anyone help me? Even if it is just a link to another thread. Thank you.

EDIT: Also, if the screen is say 6.5 feet diagonal, whats a good distance to sit back from the screen?

Thanks again!

http://www.lumenlab.com/forums/index.php?showtopic=7912

The best distance is about 1.4-1.6x the distance from the screen. So around 9' back from a 6.5' screen.