brightness (a) x screen size(b) = what projecter? ????? - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
Thread Tools
post #1 of 2 Old 08-07-2014, 03:21 PM - Thread Starter
Advanced Member
metalguy's Avatar
Join Date: Apr 2008
Posts: 509
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 127 Post(s)
Liked: 41
brightness (a) x screen size(b) = what projecter? ?????

So my problem is trying to figure out how big of a screen to get. I have room to go as large as I really want to, but the problem is how do i figure out how which projector will work for me other than just looking at the lumens? I have seen small cheap projectors that claim to light up to 200- 300 inches and others that cost several thousand dollars that have a hard time filling up 120, let alone 3d. so if anyone can give me a guide as to what to look for that would be great. Thanks in advance.
metalguy is offline  
Sponsored Links
post #2 of 2 Old 08-07-2014, 07:19 PM
AVS Forum Special Member
Ftoast's Avatar
Join Date: Dec 2013
Posts: 5,038
Mentioned: 44 Post(s)
Tagged: 1 Thread(s)
Quoted: 1919 Post(s)
Liked: 624
Theaters (and many users) try to aim for 14ftL. which is lumens divided by screen size in square footage. An example would be a 500lumen projector on a 110" screen (which is 8x4.5=36ft square at 16:9)..that's 500lumens/36ft = 13.9ftL. More than enough for bright 2D.

Many users seem to be fine going as low as 10ftL, but it is common for 2-3.5ftL (with gamma still set very dark) to get complaints. I would recommend aiming a little higher for 3D unless you can recover decently with gamma control (15ftL+ is likely a good spot to be for 3D).

110" needs 430lumen for 12ftL, or 540L for 15ftL
120" needs 570L for 12ftL, or 715L for 15ftL
130" needs 605L for 12ftL, or 750L for 15ftL
140" wants 700@12 or 875@15
150" wants 800@12 or 1000@15

Both the top recommendations for their price categories (w1070 and hw40) make 800+lumens in eco and around 1400lumens with full-lamp at very accurate settings which will keep you safe for lamp dimming over time even on a 150" screen.

Easy $25 DIY black (or any color) ALR paint +$40-$50sprayer screen mix smooth/clean and very easy to learn spraying with little/no mess.
Simple $25-40 DIY black/dark-grey ambient-light rejecting screen, grab two things from a local store..mix..roll..done.
Quick <$250 dedicated black-fabric theater room "A store that sells blinds can help your picture more than a store that sells projectors many times." -bud16415

Last edited by Ftoast; 08-07-2014 at 11:03 PM.
Ftoast is online now  
Sponsored Links
Reply Digital Projectors - Under $3,000 USD MSRP

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off