skip to: page content | links on this page | site navigation | footer (site information)
 
Not logged in

Big Screen Forums

Projector Forums: Projection Screens Forum

Topic: Screen gain for a bright projector
 
LoginRegisterRules
Add Reply to Topic
Author
Topic: Screen gain for a bright projector
bstra00t
member
Joined: Nov 27, 2024
Posts: 1
Nov 27, 2024 3:56 PMReply to PostAlert Moderator
Hello everyone,

Quick question in relation to screen gain. I have a Optoma GT1080HDR that I plan to project to a 150" screen. Seating distance would be about 11-12ft away (IMAX experience).

The general consensus seems to be dark treated room = white screen, and low/high ambient light = grey/ALR. I have a dedicated space, everything's painted flat black (including ceiling), no ambient light.

When I look at the foot lambert calculator on projectorcentral for my model, a 1.0 gain screen is reading at 56.78 FTL for 150". Given this is not within the 16-26 FTL recommended for dark rooms, how low do you have to go here? Am I misreading something, or is my 3800 lumen projector just that bright?

Thanks!
B
[Edited by bstra00t on Nov 27, 2024 at 3:57 PM]
AV_Integrated
moderator
Joined: Mar 28, 2005
Posts: 13,332
Dec 3, 2024 8:36 AMReply to PostAlert Moderator
Your projector isn't NEARLY that bright. Optoma has a tendency to severely overstate their brightness claims. Also, the claim is for absolute PEAK brightness, not calibrated and accurate brightness. This is why reading reviews is so very important.

Generally speaking though, you can run the projector in low lamp mode, which makes it quieter and the lamp last longer, and in cinema mode, which is often the most color accurate, and one of the dimmer settings.

This said, a white screen is still the strongest recommendation in a properly treated dark cinema, and will help the image 'pop' when there are bright details on the screen.
AV Integrated - Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.
Add Reply to Topic
 

Where to Buy:

Projectors Lamps Screens Ceiling Mounts