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post #10561 of 10566 Old 10-17-2014, 06:48 AM
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Quote:
Originally Posted by ShaharT View Post
Really appreciate your feedback – thank you.

Another question, this time on seating distance from a 4K image.

I read online that seating distance from 4K content (or upscaled to 4K content) can and maybe should be closer than the conventional previous wisdom of up to 3.5 times the screen height.

We initially planned a 130” wide 2.35 a/r screen (141” diagonal), that’s supposed to drop between the side speakers and above the center speaker.
The room is under construction, but I stopped by the construction site today, and using masking tape, drew it on the wall. And… that screen did not seem “big” enough for that room.

By moving the screen to be in front of the speakers instead of the original plan of dropping down between the side speakers and above the center speaker, I can now plan for a larger screen (that will be perforated for sound) that can also have its bottom closer to the floor. [First question – is there a best practice on how low above floor level should a screen end at?]

What would nicely fit in when taking the screen in front of the speakers is now a 162” wide 2.35 a/r screen (176” diagonal).
Visually looking at the masking tape glued to the wall to simulate this larger size – I loved it!
I read the VPL-VW1100ES can easily fill a 176” image without compromising brightness, so that’s not a concern.

Now I need to make sure this new screen size is not too big for where the seating is planned to be……

Using this online calculator http://myhometheater.homestead.com/v...alculator.html (that can only take a 16:9 based image size for its calculation of seating distance – so I’ve entered the constant-height 16:9 image that will projected on this 2.35 screen, which is 123” wide on 69” with a 141” diagonal) I see that THX recommended viewing distance is about 16 feet from a screen of this size – a distance that is about as far back as my room would allow. Which means if I got something wrong – I might end up with a screen too big for where my seating distance is.

So my question is – am I doing the math right? Will a reasonable viewing distance of 16 feet work with a constant image height 2.35 176” diagonal screen / 16:9 141” diagonal? And is the math different for 4K content? And a less important question mentioned earlier above, is if there’s best practice on how low above floor level should the screen end, if there’s no practical limitation (center speaker now behind the screen).

The reason I’m so fixated on this, is that I need to tell my contractor where in the concrete ceiling to leave an opening for the screen case (right next to the wall behind, so the screen drops right in front of the tv and between the speakers, or 2 foot forward in the ceiling, in front of the speakers) as well as the dimensions of this opening.

I really appreciate your kindness and patience with me and my questions.
Best,
Shahar
I sit one screen width or 2.4 screen heights from my scope screen and like this distance. Nobody has complained of being too close.
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post #10562 of 10566 Old 10-17-2014, 07:24 AM
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Thanks!! These are super useful answers for me, that helped me feel safer with putting the screen in front of the projector, allowing much bigger screen.

What's your advice or your own setup in terms of how low above the floor do you get the bottom of your screen to end?

I'm currently thinking of having the bottom of the screen (black masking part + metal rod [sorry I'm not sure what's the technical term for that piece]) reach about 8" from the floor, which means the 'white part' of the screen would start about 5" above that, at about 13" from floor level. Does that make sense?
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post #10563 of 10566 Old 10-17-2014, 07:56 AM
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Quote:
Originally Posted by ShaharT View Post
Thanks!! These are super useful answers for me, that helped me feel safer with putting the screen in front of the projector, allowing much bigger screen.

What's your advice or your own setup in terms of how low above the floor do you get the bottom of your screen to end?

I'm currently thinking of having the bottom of the screen (black masking part + metal rod [sorry I'm not sure what's the technical term for that piece]) reach about 8" from the floor, which means the 'white part' of the screen would start about 5" above that, at about 13" from floor level. Does that make sense?
My 72"H screen is on a 100"H wall; it is 16" from the floor, and 12" from the ceiling. I decided on this by showing the pj on the wall for several days before mounting the screen. If you're building an unmovable screen, then you of course don't have this option. Anyway, I am very pleased with the dimensions I chose, but any room has its own specifics.
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post #10564 of 10566 Old 10-17-2014, 12:14 PM
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Originally Posted by millerwill View Post
I also like to sit fairly close (~11 ft from a 144" W screen), but as said viewing distance is a very personal thing.
Me to, I am 10ft from the same size screen and it is totally awesome!!!
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post #10565 of 10566 Old 10-17-2014, 01:23 PM
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Quote:
Originally Posted by ShaharT View Post
Thanks!! These are super useful answers for me, that helped me feel safer with putting the screen in front of the projector, allowing much bigger screen.

What's your advice or your own setup in terms of how low above the floor do you get the bottom of your screen to end?

I'm currently thinking of having the bottom of the screen (black masking part + metal rod [sorry I'm not sure what's the technical term for that piece]) reach about 8" from the floor, which means the 'white part' of the screen would start about 5" above that, at about 13" from floor level. Does that make sense?
My image used to be 20" above the floor, but currently it is 30". That is due to the large bass section of my mains and one of my large 18" subwoofers, under the screen. When I sit up in my chairs, that still puts me, viewing 1/3rd up the screen. Scope screen is 44.5" tall and my eye height is 45".
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post #10566 of 10566 Old Yesterday, 01:07 PM
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Quote:
Originally Posted by Andreas21 View Post
Use Cinema1, D65 and rec 709 and you have a good pre calibrated mode. Reference was the best mode with the VW1000, but with the VW1100 it think Reference and Cinema1 is quite similar. Of course the best is to get it professionally calibrated, but I know you know this.
Thanks for sharing this. I hadn't really played with my settings, since the upgrade. I was just using what I had used in the past (which was reference tweaked in a variety of ways). I really like the suggestion of default Cinema1, D65, and rec 709 after the upgrade. There are a lot of settings engaged in the advanced menu and the synergy is really nice. The result is surprisingly bright and beautiful.

Ben
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post #10567 of 10566 Old Yesterday, 02:59 PM
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Ive been experimenting and interested in your thoughts....


Advanced Settings:


1. Anyone using "Black Level Adjustment" in advanced settings?
I believe it crushes blacks. It has a default setting of LOW in Cin 1 which is what I use. After lots of checking on blacks with bright backgrounds the detail is lost on the black parts of the image, when you turn it off the shadow detail returns. Ive seen this on a number of projectors that use this type of black enhancement and the problem also happened with my previous 500. Maybe OFF is the way to go?


2. Colour Correction, is it safe to use without artefacts?


3. Smooth Graduation, what is it who uses it? The manual is just stupid what it says.... Whatever this does, does it add artefacts? Who uses it?


4. How do people really know if they have the black floor at the lowest it really goes to with this projector. In the past with all my JVCs I used to put up 100% black field and use the black function on the JVC and adjust BLACK until it no longer showed up any changes with the blanking closed on the JVC. With this method I know I had the black floor set correctly on the projector. It doesn't seem to work like this on my 1100 even though Im using the blanking function on the Sony via RS232. not available in the menu or the remote on this model.


5. If one uses a HTPC what is the correct colour space to use, I was told BT.709 is not correct for a PC?




Thanks guys...
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