Need Screen sizing help - AVS Forum
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post #1 of 7 Old 06-19-2013, 03:29 PM - Thread Starter
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Hello everybody,

I need some advice as to which screen size to get 120" vs 130"

I have a completely light controlled environment (completely dark if needed) and...

Sony HW30ES projector
View distance 12-13ft
Screen is 3ft off floor
Seymour XD acoustically transparent screen.

Questions:

Should I get a 120 or 130" screen?
Can this projector be about 77 off the floor?

Thanks for your help in advance!

Joe
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post #2 of 7 Old 06-19-2013, 03:38 PM
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Quote:
Originally Posted by joechuan View Post

Hello everybody,

I need some advice as to which screen size to get 120" vs 130"

I have a completely light controlled environment (completely dark if needed) and...

Sony HW30ES projector
View distance 12-13ft
Screen is 3ft off floor
Seymour XD acoustically transparent screen.

Questions:

Should I get a 120 or 130" screen?
Can this projector be about 77 off the floor?

Thanks for your help in advance!

Joe

this may help,though I didn't try it[IMG
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post #3 of 7 Old 06-19-2013, 03:43 PM
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120" diagonal.
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post #4 of 7 Old 06-19-2013, 05:43 PM - Thread Starter
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Thank you very much for your suggestion!
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post #5 of 7 Old 06-19-2013, 07:31 PM
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Quote:
Originally Posted by joechuan View Post

Thank you very much for your suggestion!
Where do you like to sit in a movie theater?

THX calls for viewing to be about 1.5x the screen width, or vice-versa, your screen width is .66x your viewing distance.

So, from 12' that's a 8' wide screen which is about 110" diagonal.

What's that mean for you?

That means that if you like sitting DEAD CENTER in your typical movie theater, then a 110" diagonal screen, from 12' away, will recreate that effect almost exactly.

But, some people like the screen to be a bit bigger, so they sit closer.

That's fine - there is truly nothing wrong with that other than the reality that you may see some pixel structure from the projector at that distance. I certainly have that issue when I go to a digital movie theater, but I accept it because I like the larger image.

So, I would go to at least 120" if that's the case, and nothing wrong with 130" either from that distance.

Now, depending on your timing and setup, you could actually fire the projector up, hook up a Blu-ray player to it and just watch a movie on a white wall with a 120" and a 130" diagonal and see which version you prefer from a 12'-13' viewing distance. That's truly the best way to do things always IMO as it gives you something very personalized to your specific tastes. You may find you want something closer to 110" or even a bit bigger.

The Sony 30ES has lens shift which means that you should have no issue placing it 77" above the floor. Generally, you measure DOWN from the ceiling, not up from the floor when ceiling mounting. It is much easier to measure that way... usually.

AV Integrated - Theater, whole house audio, and technology installation in the Washington DC metro area.
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post #6 of 7 Old 06-19-2013, 09:42 PM - Thread Starter
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AV Integration,

Thanks so much for your helpful comments! I really do appreciate forum members such as yourself who take the time to post great advice such as this.

I am currently building a house with a home theater room, but I wanted it all to get done prior to move-in and was going to order a Seymour XD screen from Jamestown Screens for it. I don't really have a true THX setup (it's 5.2) and so the rear speakers are going to be about 2 feet behind me. I would like to sit in the center, but I don't want to compromise picture quality. The pros of going 130 at 12 feet is that it will be a bigger, perhaps more immersing experience. However, if I went 120, will the picture perhaps be sharper from that distance?

I really want to maximize picture quality to have the sharpest, cleanest possible.

Oh and the reason I was measuring up is because I am building a platform to hold the projectors as opposed to hanging it from the ceiling.

Joe
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post #7 of 7 Old 06-20-2013, 11:28 AM
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You might consider the brightness drop to go with a bigger screen, taking into account as the bulb ages the brightness will drop as well. Is that screen 1.2 gain? Some numbers from Coderguys calc at, www.eliteprojectorcalculator.com show a 130" will only give you about 14.3 fl, where a 120" will be a little brighter at 16.9 fl. A movie theater is normally around 16 fl.

For the maximum picture aspect, you might take into account the proper throw range as well. To get a little better contrast/sharpness is usually further away, but you sacrifice a little brightness. http://www.avsforum.com/t/1226740/does-zooming-degrade-picture-quality#post_18132593
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