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I Made DIY 2.40:1 Masking for My 1.85:1 Screen - Page 5

post #121 of 164
OK I have all material now.

This isn't as cheap as I thought it'd be, someone else said it'd be $17/yard for the blackest velvet.

Considering my screen width, I'd need 4 yards (and hopefully I can cut it height in half to use for both masks) - $68!

Seems like a $100 masking scenario for me since I also had to buy double sided velcro and 3m spray adhesive, in addition to the $20 of styforoam board (since I need two 4x8 to extend wide enough).





Without masking (iphone takes blurry pictures - gray bars extend completely across screen, hard to photograph):


-ELmO
post #122 of 164
You can get the SYFabrics Black Plush Triple Velvet for $7 a yard. That is what I used for my bonus-room temporary theater.
post #123 of 164
i paid $13 a yard at a local store called Jo-Anns fabrics. It was the royal black i think it is.

also check around for places going out of business.
post #124 of 164
Interestingly, most of the velvet I saw at Joann's has a shimmer to it (as VELVET does!!) - I was afraid that it wouldn't work well since the projector might be projecting light on it.

I did a quick test with holding the fabric up and it indeed appears to block out all light fine when the lights are off...and appear black.

We will see wheN I have it jury rigged together sometime this week.

-ELmO
post #125 of 164
Just one more voice for implimenting a masking plan ASAP. It does make a huge difference in the improvement of the experience. You (I) want the image to float in the end of the room.

I have been using some version of masking for over 20 years starting with a 35" JVC tube set. ($3000 at the time). Oh how things change.

Currently using the 1" thick insulation board, black velvet from Jo Ann's, used hot glue methode to secure cloth to boards (pull tightly around the edge and glue to back) with velcro to hold masks in place on 84" wide, Dalite HP screen on DIY frame, also covered with the same black velvet.

I am going to change later this year or early next to a larger 110' wide, 2.35:1 screen with SIDE masking. Much easier to deal with the masking for 16 x 9 format viewing. Either swing or slide back and forth. Many simple automation options. Only negative I see is dealing with sub titles.

Regardless of the methode, everone should get rid of them darn BLACK BARS!

Steve
post #126 of 164
Black bars? I *want* black bars! It is the grey bars that I want gone!
post #127 of 164
just watched some transformers and terminator 3 with velvet black bars, superior
post #128 of 164
Quote:
Originally Posted by gnolivos View Post

Black bars? I *want* black bars! It is the grey bars that I want gone!

I should have said NO bars! Good point.

Steve
post #129 of 164
interestingly i watched chronicles of narnia lion witch wardrobe, and it was set to 2.4:1.

The aspect ratio is cropped differently than transformers - and I actually was unable to move my top mask high enough to show the full image at the top.

The bottom mask was fine - but I only have about 1" to work with at the top (before it hits the ceiling). I missed roughly 1-2" of the top of the image throughout the movie! RATS!!!

Why aren't movies filmed with specific aspect ratios projecting in the same area of the 1.78 screen? I.e. I'd assume 2.35 and 2.35 would project in the same area, but this was over 1-2" off!
-ELmO
post #130 of 164
I may have to go to the insulation board stuff as my top wood board is starting to warp like crazy. what is everyone buying?
post #131 of 164
I have been using the ridgid 1" foam insulation board, with the aluminum foil on both sides, covered with black velvet. At 84" wide no problems.

I think some have been using the 1/2 version, but depending on the width you are covering the 1" would always be stronger. No sagging.

Steve
post #132 of 164
Mine is 87" * 5 1/2" right now but I need to consider something else.
post #133 of 164
dogprego and others...
thanks for the info in this thread - just got done making my masks and they have improved the picture quite a bit, especially at night when I can make the room pitch dark.
post #134 of 164
Thread Starter 
Quote:
Originally Posted by Maestro J View Post

dogprego and others...
thanks for the info in this thread - just got done making my masks and they have improved the picture quite a bit, especially at night when I can make the room pitch dark.

You are quite welcome. Let's see some pics.

Interestingly I have returned to my own thread because I am in the beginning of a brand new theater project. I am trying to decide on which screen to pair with my new pj, a Panasonic PT-AX200U. One of the big considerations is how I will accomplish masking in the new HT. I was thrilled with my last masks but I don't think they are a good fit for my new HT. The last screen was 89", the new one will be 120" at a minimum. Placing foam masks is not going to be practical in this scenario. On top of that I may purchase a professionally made screen this time around. If I go DIY I am going to build the masks into the screen. Truth is I don't really feel like building a screen again and will probably end up buying an Elite screen and figuring out some way to mask it.
post #135 of 164
Thread Starter 
So I am ordering that Elite 120" screen I mentioned. Any ideas on how to mask it? This time I would like to devise a more automated method of masking. It would be great if I could push a button and have the panels raise up from the bottom and lower from the top. but not essential. I just don't want to have to manually place them in position if it can be avoided. Even a manual system that would raise and lower them would be great.

I was thinking of some sort of track that runs next to the screen on the left and right from bottom to top. The masks could ride in this track and slide down over the screen to the desired height depending on ratio. I am not sure how to pull this off but at least it's a start.

So any ideas?
post #136 of 164
Masking installed with lights on:
post #137 of 164
Quote:
Originally Posted by docprego View Post


So any ideas?

You could check out the thread link in my sg for one idea of a manual masking system. It isn't completely finished, but you can get the idea.

Another one of my design ideas that I did not use was to put the masking system on drawer pullout rollers. So when you want to use the masking system, just pull down or pull up the mask and it would extend into the screen area using the draw rollers and lock into place. If you don't fully understand that design based on my description, I think I have a design drawing someplace around here.
post #138 of 164
Quote:
Originally Posted by docprego View Post

So I am ordering that Elite 120" screen I mentioned. Any ideas on how to mask it? This time I would like to devise a more automated method of masking. It would be great if I could push a button and have the panels raise up from the bottom and lower from the top. but not essential. I just don't want to have to manually place them in position if it can be avoided. Even a manual system that would raise and lower them would be great.

I was thinking of some sort of track that runs next to the screen on the left and right from bottom to top. The masks could ride in this track and slide down over the screen to the desired height depending on ratio. I am not sure how to pull this off but at least it's a start.

So any ideas?

Mike,
While reading & lurking here for a year I have run across a few links related to masking ideas. Here are a few:

AVS member "threeinone", see post #1 for pics & post #6 for a drawing of his T/B motorized masking set up:
http://www.avsforum.com/avs-vb/showt...518&highlight=

Manual T/B horiz masking animation;
http://www.avsforum.com/avs-vb/attac...8&d=1228255783

Line drawing form British Film Club;
http://www.bfcc.biz/masking.jpg
Note: cords wrap in opposite directions around top roller, so as one mask lowers, the other is pulled upward.

Top roller, drop down, side masking animation;
http://home.earthlink.net/~sushinut/dropmask.gif
(Not what you were asking about, but a cool animation)

AVS member "Jim Mc" from AVS archive 2 "The Stargate"
theater's T/B horiz masking set up, see post #16 for details;
http://archive2.avsforum.com/avs-vb/...d.php?t=271105

You may have already checked this one out, if not please do; AVS member "ScottJ0007" manual 4-way AT masking with wonderful photos;
http://www.avsforum.com/avs-vb/showthread.php?t=941076

Hope these spark ideas for you. One could mount AL U-channels facing inward on each side of the screen to keep the masks' leading edge at a proper distance from the screen surface.

John Hope this helps
post #139 of 164
Quote:
Originally Posted by docprego View Post

So I am ordering that Elite 120" screen I mentioned. Any ideas on how to mask it?
So any ideas?

I have a 100" Elite fixed screen and noticed the inside frame lip is alittle less than 1/2" probably closer to 3/8" thickness...I have enough fabric...just don't know what to use for the actual mask...foam board etc.

Would the 1/2" board be too flexable?
post #140 of 164
Quote:
Originally Posted by jwv651 View Post

I have a 100" Elite fixed screen and noticed the inside frame lip is alittle less than 1/2" probably closer to 3/8" thickness...I have enough fabric...just don't know what to use for the actual mask...foam board etc.

Would the 1/2" board be too flexable?

If the foam board is too flexible for your application, consider using yardsticks to build the frame. I used 1/4" thick sticks for my 92" screen, but you may prefer using 3/8".
post #141 of 164
Quote:
Originally Posted by ajstan99 View Post

If the foam board is too flexible for your application, consider using yardsticks to build the frame. I used 1/4" thick sticks for my 92" screen, but you may prefer using 3/8".

Sounds good...that just might work even better.
post #142 of 164
Well I did the docprego masking thingy and I must say it looks and works excellent...under 30 seconds to put up after completion. Having a mask really does improve image quality...adds a little more pop and wow than without. Best is NO MORE ANNOYING BARS.
post #143 of 164
Thread Starter 
My new theater is up and running, as I said I ordered the Elite 120" 16:9 screen. I love the screen, really beautiful craftsmanship.

My only concern is that Elite doesn't cover it in true velvet, it is more of a sprayed on finish and seems a bit fragile. It's Ironic how I can't use my own system this time around, I am concerned that if I use my own system the rubbing of the panels on the inside of the frame will cause damage to the frame coating. So this time I want a system that does not make physical contact with the frame surface.

I just put curtains up around my screen so I have a very well hidden area on the left and the right of the screen that I could use to devise some sort of masking system.



All ideas and sugggestions are welcome.
post #144 of 164
Thread Starter 
Further investigating this it seems that the Elite screen has only 1/2 inch border to work with. I am not sure how to approach this. I actually stood a piece of the 1 inch thick foam from the last project on the lower part of my frame and it stood there just fine. It stuck out about 1/2 inch from the frame surface so it still might be viable but won't lie flush. From 10 foot viewing distance this is probably a non issue.

So it is proving to be a challenge but I definitely want to make masks. Have any Elite (or other brand) fixed frame owners with very small amounts of frame to work with made masks? How did you attach them and what materials did you use?
post #145 of 164
Thread Starter 
I have started a new thread to document the creation of my masks for the Elite screen:

http://www.avsforum.com/avs-vb/showt...7#post15525357
post #146 of 164
Thanks to you guys for your inspiration and ideas. I just saw this thread about 2 weeks ago and now have my own panel solution.

Tried to find the blue styrofoam at Lowe's but no success in my area. All I could find was that flimsy white Styrofoam. However, I did find a more rigid Styrofoam that worked out great for me. It has white on one side and the other side is silver. The cost was like $12.84 for a 4x8 sheet. It cut really well with a good utility knife. I was pleasantly surprised by this.

I bought royal black velvet from michaels.com and got 50 percent off. Bought 2 yards of it. I have a 92" Criterion screen from Carada that I didn't know quite how I was going to make this all work because of the 45 degree bevel frame.

I didn't have to use 3M spray adhesive or velcro for my purpose. I really lucked out. I only created ONE panel. I wrapped the velvet and used sewing pins to hold in place on the back. I thought this was going to be just temporary to see how things looked but as it turns out its tight and good enough for me in my bat cave. I use the lens shift on the PJ to bring it to the top edge and just use the ONE panel I made which nestles on top the center speaker and behind my front speakers very nicely. No hassle or damage to the screen this way. Easy operation of removing or installing in less than 10 seconds.

I know this won't work for most. I just really lucked out here that it worked this way. 2 yards of Royal Black Velvet. $21. Foamboard. $13. Watching a movie in 2:35 aspect ratio with no grey bars. PRICELESS!

The result is absolutely fantastic. I saved myself $2400 by not buying the Masquerade system

Now I can use that money for a JVC PJ down the road.

I will post a few pics if anyone is interested.
post #147 of 164
yes pics please paradigm!
post #148 of 164
Hey gnolivos! Long time no see. Alright I will get some pics up.
post #149 of 164
Here they are. My photography sucks!
Second picture is without the mask.





post #150 of 164
Thread Starter 
Quote:
Originally Posted by paradigm View Post

Here they are. My photography sucks!
Second picture is without the mask.

I just used the same foam to make my new masks for my Elite screen. i also added metal edges for clean borders, have a look at my new thread:

http://www.avsforum.com/avs-vb/showt...7#post15525357
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