DIY Masking Wide screen - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 2Likes
  • 1 Post By craigmohead
  • 1 Post By ScottAvery
 
Thread Tools
post #1 of 5 Old 06-24-2019, 11:00 AM - Thread Starter
Member
 
gil393's Avatar
 
Join Date: Dec 2013
Posts: 166
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 87 Post(s)
Liked: 54
DIY Masking Wide screen

I'd like to add velvet masking to my fixed height screen to use when watching wide format movies. I'm not sure how to do build this. The screen is 14'6" wide so plywood or even 10' sheet goods are out of the question.

Is it as simple as using two pieces of 1/4 plywood with metal plates joining them and perhaps a few 16' 1x4s or 2x2s to stiffen the assembly. The velvet going over the 1x4 would probably not be too visible or annoying. This is the best I can come up with if anybody has tried this any thoughts on what works and what doesn't is greatly appreciated.
gil393 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 06-24-2019, 03:52 PM
DIY Granddad (w/help)
 
MississippiMan's Avatar
 
Join Date: Nov 2002
Location: Byhalia, Mississippi. Waaaay down in the Bottoms
Posts: 22,375
Mentioned: 296 Post(s)
Tagged: 6 Thread(s)
Quoted: 3868 Post(s)
Liked: 1804
Send a message via Skype™ to MississippiMan
What PJ are you using?
Lens Shift.......

What size screen? (OK...just saw 14'.6" wide)

Two things......I read where you were considering a 5050? Despite what some have said, if your Throw can be set at 20' and you use a Screen surface of 1.1 gain, you'll get 24 fl to start out with, and even with Lamp Dimming, a 200" diagonal screen putting out 16 fl across it's surface is a real light producer! 16 fl equates to being 58 nit....well within accepted norms

Masking options are a challenge without Vertical Lens Shift. If you have / get it, you can use a single length of Black Velvet attached to a 15' 2 x4 ripped to 2x3(2.75") that can rest on L-Brackets. Sadly, there isn't going to a much in the way of a Retractable Roller assembly available.....manual or motorized, and any composite Panel Assembly will weigh too much.

In any case, doing Top & Bottom Masks on a screen that size (width) would be an exercise in frustration...perhaps even failure. Shifting the image down and hanging a Curtain-like Mask....much MUCH easier.

"They said it couldn't be done. Well, we sure showed 'em otherwise!"
HAS Advanced Audio and Imaging Solutions...Audio Transducers & Projection Screen Coatings

Last edited by MississippiMan; 06-24-2019 at 04:21 PM.
MississippiMan is offline  
post #3 of 5 Old 06-25-2019, 06:44 PM - Thread Starter
Member
 
gil393's Avatar
 
Join Date: Dec 2013
Posts: 166
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 87 Post(s)
Liked: 54
Thanks for the ideas. It didn't occur to me to move the image. Also, now that you mention it, top and bottom is an issue, especially top.

I am using a single Projection Design DVision 30 XC. Horizontal lens shift went out, thankfully it was centered at the time, but motorized vertical is still working. I get 14fl with brilliant color on, but a grayscale ramp has banding and very light pinks and green color tones. Sports and action movies it is not an issue. Movies with snow and white shadows can get a bit distracting, too me at least. Without BC the grayscale ramp is perfect but the image is a bit dim. I have a second one of these projectors and was thinking of possibly stacking them. Screen is DIY AT Centerstage XD. Speakers are in the the upper 2/3rds so shifting the image down might be an issue. Also, the top of the screen is about 14' in the air and climbing up on scaffolding to put on the masking is a no go. I totally didn't think of that.

How about moving the image up to the top and hanging the velvet from the bottom of the image. Will the thickness of the 2x3 at that bottom of the image, top of the mask, be a distraction? I was thinking of using magnets to mount the mask so that slight adjustments could be made. Yes/No? The ones I have are rare earth and hold 10+ pounds.

Again, thanks for the help and saving me from trying something dumb.
gil393 is offline  
Sponsored Links
Advertisement
 
post #4 of 5 Old 06-26-2019, 01:01 PM
Member
 
craigmohead's Avatar
 
Join Date: May 2006
Location: Silver Spring, MD
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Liked: 12
I'm not 100% sure this will work for you, but this is the best DIY masking solution I've seen, at least for top and bottom bars:

https://www.avsforum.com/forum/110-d...djustable.html
Low Profile likes this.
craigmohead is offline  
post #5 of 5 Old 06-26-2019, 02:05 PM
AVS Forum Special Member
 
ScottAvery's Avatar
 
Join Date: Mar 2002
Location: Great Falls, VA
Posts: 1,818
Mentioned: 24 Post(s)
Tagged: 0 Thread(s)
Quoted: 735 Post(s)
Liked: 216
Quote:
Originally Posted by gil393 View Post
I'd like to add velvet masking to my fixed height screen to use when watching wide format movies. I'm not sure how to do build this. The screen is 14'6" wide so plywood or even 10' sheet goods are out of the question.

Is it as simple as using two pieces of 1/4 plywood with metal plates joining them and perhaps a few 16' 1x4s or 2x2s to stiffen the assembly. The velvet going over the 1x4 would probably not be too visible or annoying. This is the best I can come up with if anybody has tried this any thoughts on what works and what doesn't is greatly appreciated.
It is easier to mask the top only as you don't have to worry about covering a 14 foot span with a material thin enough to be used as a mask as you can simply weight a drape. Given the extreme height I'd recommend having it on pulleys so you can raise and lower it from the ground.

If you do want to mask the bottom, I have seen a build that uses aluminum U channel to reinforce the mask to reduce flex across the span.
Low Profile likes this.
ScottAvery is offline  
Sponsored Links
Advertisement
 
Reply DIY Screen Section

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