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Discussion Starter · #1 ·
I received my parkland plastic today, 5X10 sheet, and now I'm ready to make a frame and mount it. However, I'm not sure what dimensions to use. I'm using a diagonal of 100". I will be watching widescreen movies, what are the measurements I need to cut? What kind of water based glue should I use? How thick should the border be? Since aspect ratios are all different, is there a happy medium I should consider or just go with 16:9?
 

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Ask Pythagoras...


x^2 + y^2 = h^2 where h is the hypotenuse of the triangle which you said you want to be 100 inches. x is the width. y is the height.


you know that x/y=16/9 so x=16y/9


so ....


(16y/9)^2 + y^2 = 10000

...

256y^2/81 + y^2 = 10000

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256y^2 + 81y^2 = 810000

...

337y^2 = 810000

...

y^2 = 2403.56

...

y = 49.03 inches


x= 87.16 inches


Checking in the original equation 100 = 100.004 That's close enough for free work.


Ahh - the 8th grade memories (and after that comment I hope I didn't goof).
 

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Discussion Starter · #6 ·
PerryH,


Okay, that sounds good to me, thanks for the help. Do most of you cut in 16:9? Just a few more questions needing to be answered. Yes, I will leave room for a border. I figure about 2.5" would be enough.
 

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Have you thought of a constant height screen? I wish that I had gone this route when I made mine, in fact when I get around to re-decorating the home theatre I WILL be going that route!


With a 5x10 foot sheet of parkland I would leave it 10'wide and possibly reduce the height just a little bit. Then use the PJ's lens zoom to fill the height for each aspect ratio from 4:3 all the way to 2.40:1.


With this method you would only have to worry about masking in one plane, this case on the 2 vertical ends ;)


Right now my screen is 52" high 92" wide (viewable) for 16:9, if I kept it that high but made it 120" wide then it would be almost a perfect 2.40:1 super cinemascope screen!
 
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