Originally Posted by domingos1965
so if i have a 18x 15 with 9' ceilings and get a 120" screen what would the throw be?
and how many inches should the top of the screen be from the ceiling?
You have a lot play with your room size and screen size so these are just some throws and screen gain and zoom I'm posting here.
You have to decide what screen you'll be buying and how much gain. How many foot lamberts you need for your taste (brightness) and take in to account if you have control of lighting.
Your throw could be 13 ft with a foot lamberts of 17 using a screen with a gain of 1.0 and a zoom of 1.83
A throw of 15 ft giving you 19 foot lamberts using a screen with a gain of 1.3 and a zoom of 1.58
Throw of 14 ft giving you 22 foot lamberts with a screen gain of 1.4 and zoom of 1.70
Only use the sliding bar on the left side to adjust throw and diagonal screen size
at projector central then play with the screen gain to adjust Foot lamberts if needed.
As for me I rather the higher end of foot lamberts being the bulb loses a lot of it's brightness the first few hundred hours.