2.40/1 screen. Am I on track? - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 22 Old 04-12-10, 09:16 AM Thread Starter
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2.40/1 screen. Am I on track?

Hy people,

I would like to do a widescreen HT set-up. After reading posts here, I made an attempt to a design that you can view from the attachment.

The room is semi-dedicated with ample glazing, so even with the heavy black curtains, some ambient light cannot be excluded 100% though we usually watch after dark.
Room W = 28' / D = 23' / H = 8'
There's a 16' wide "black" part of the front wall for the LCR, the custom made pair of LLT SW towers and an AT screen.
We would like a hugh screen, we are not fanatic about picture quality, as long as it's decent enough. Seating distance would be 12'. Hence the screen height could be not more than 6'. For a 16/9, this would limit to a 128" width. But if 2.40/1, this would be 168" x 70"! That's more like it.

Am I pushing to wide here? For normal teevee 16/9 content, we would still have the 128" width, more or less. But with BluRay movies and a anamorphic lens, it would be really immersive. I tried to estimate the viewing distance / screen width ratio in our local movie theater and the screen width was at least as wide as the viewing distance when we sit in the favoured center of the theater.

I see 2 projectors which could do the job in our price range:
1/ Pana PT-AE4000 that is easy for setting up the 2.40/1
2/ BenQ W6000 which is bright enough for a very large screen.
Which would be best?
I found the prices to be 2000€ for the BenQ and 2400€ for the Pana

Projector / screen distance would be max 19' (ceiling mount)

Ronse2010B_HTplan2.pdf

Thanks for helping out!

Oh, one more thing: the Philips BDP9100 player is sold as the ideal device for 21/9 format because of the possibility to shift the subtitles away from the black bars. Maybe no concern for most of you if you only watch English spoken movies, but this is certainly not the case here in Belgium. We have the habbit of using subtitles, not voice-overs for foreign languages. English is no problem, but most other languages are a challenge. Ideas? The BlueRay of choice would be the Oppo BD83, not the Philips.

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Last edited by erwinbel; 04-12-10 at 01:31 PM. Reason: prices / subtitles
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post #2 of 22 Old 04-12-10, 10:58 PM
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Re: 2.40/1 screen. Am I on track?

Well, this is probably the first time I've ever said this, but I think that screen will be too large.

I sit about 12' from a 126" (diagonal) 16:9 screen and while I think it's about perfect, I would not want it any larger (btw, the recommended screen size for 12' viewing distance is about 105" diagonal for a 16:9 screen). That's only 110" wide. Your planned screen of 128" wide is significantly larger and I would not recommend it.

I think you'll be much better off if you stick with a fixed screen height of about 62" (110" wide 16:9, and 148" wide 2.4:1)
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post #3 of 22 Old 04-13-10, 09:20 AM
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Re: 2.40/1 screen. Am I on track?

I agree it's a bit over. THX recommendation is for a max 40 included angle. At 12' distance, that's about 104" wide. I would go for this as the max width regardless of ratio.

-Greg

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post #4 of 22 Old 04-13-10, 09:47 AM Thread Starter
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Re: 2.40/1 screen. Am I on track?

Well, I looked into 2.40/1 before but at the time decided against it beacuse
a/ I don't want to spend 3000€ for the anamorphic lens
b/ Starting with a certain 2.40/1 screen width with the 40 THX recommendations results in a 16/9 size that is simply to small for our liking with constant height.

But since then I read recommendations for even 45 to 50 viewing angles (think it was Seymoor AV) and Prof said to start from double the screen height as viewing distance. So I got carried away. A bit.

But 110" (275 cm) 16/9 and 148" (370 cm) with 2.40/1 would be a very good compromise I think. We now have a 65" RPTV @ 250 cm (100") viewing and we think a projection screen should be way bigger! If we would stick to a width of 110" (or 104"), I would forget the whole 2.40/1 stuff and stick to 16/9. No?

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post #5 of 22 Old 04-13-10, 10:25 AM
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Re: 2.40/1 screen. Am I on track?

Well, any way you cut it there's going to be a compromise between size at one ratio vs size at another.

Where that compromise hits a sweet spot is really your own opinion.

Do you tend to favor content with one ratio significantly more than the other?

-Greg

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post #6 of 22 Old 04-13-10, 10:48 AM Thread Starter
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Re: 2.40/1 screen. Am I on track?

Quote:
glaufman wrote: View Post
Do you tend to favor content with one ratio significantly more than the other?
That's a tough one. I would guess the 16/9 would be for teevee content mostly (we love watching series like the Sopranos earlier, Deadwood today and Midsummer Murders (UK) or Wallander (from Sweden)) and that's more "casual". The proper 2.40/1 would be for BluRay and we would like to get this as "cinematic" as possible.
Conclusion: 80% would be 16/9, but more casual than watching 2.40/1 BluRay.

I have to remind myself to do some proper measuring next time @ the movies
No more of that footstepping, just gonna take out my laser!
Honoustly, officer, I didn't mean to cause such panic, I am only building a HT

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post #7 of 22 Old 04-13-10, 04:19 PM
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Re: 2.40/1 screen. Am I on track?

Quote:
erwinbel wrote: View Post
Conclusion: 80% would be 16/9, but more casual than watching 2.40/1 BluRay.
Keeping in mind that not every BD is 2.4:1...
So take that 80/20, and alter it to reflect the increased importance of the BD watching...

-Greg

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post #8 of 22 Old 09-10-10, 05:11 AM
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Re: 2.40/1 screen. Am I on track?

Just to clarify some THX recommended screen sizes:

For HD home viewing 16:9 is upto 40

For 2.40:1 HD it's upto 52

These also both increase if the source is 3D (upto 56 with 'cinemascope', 2.40:1)

-Pete
THX Certified Professional
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post #9 of 22 Old 09-13-10, 01:24 AM Thread Starter
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Re: 2.40/1 screen. Am I on track?

Thanks. I adjusted the design.
For 2.40:1 @ 55 this is W 360 cm (12') x H 150 cm (5')
For 16/9 @ 42 the height results in W 267 cm (107")

This is less than we hoped for to get that immersive feeling. We will do some test-viewing when the time comes. Maybe don't bother with cinemascope afterall and use 16/9 300 cm (10') x 169 cm (68") with black bars top and bottom when a 2.40:1 movie is showed. We will see.

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post #10 of 22 Old 10-01-10, 01:54 PM
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Re: 2.40/1 screen. Am I on track?

I am still holding out hope for a native 2.35:1 PJ. Probably won't happen, but I can dream.

Last edited by edgebsl; 10-01-10 at 01:54 PM. Reason: spelling
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