Theres an italian in the house! - Page 18 - AVS Forum
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post #511 of 522 Old 01-28-2009, 09:47 AM
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This is certainly a new and interesting problem. In order to maximize picture quality, i.e. avoiding a possibly detrimental ND filter, people are having to consider BIGGER screens than they were originally planning.
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post #512 of 522 Old 01-28-2009, 11:32 AM
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i know a guy who built an HT for a silicon valley billionaire in an SF penthouse. the room was NOT light controlled in any way shape or form.

WHat he did was setup a light sensor by the screen and set profiles to pull up so that he could change it based on time of day. he put in a light cannon, and then would ramp various settings depending on light and time of day. it was pretty sweet. lots of code, but it worked like a charm.

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Born October 26 2005.

Ob was the delivery doc.

Since i cannot rant on a soapbox in the town square...

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post #513 of 522 Old 01-28-2009, 12:19 PM
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CM thanks. Seemed like an obvious tweak. Simple is good for me

Now I can have 50ftL in scope and 1.78


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post #514 of 522 Old 01-28-2009, 12:56 PM
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Yesterday, our Az AV Club had a demo from a long time member who for years has had his own custom modded (he's a longtime video engineer)
NEC 10pg 9inch CRT. The member picked up cheap a used Faroudja DILA-1080pHD which he also demod. And the member is adding an addition onto his home for a forty foot wide curved Torus screen (to hopefully be done this year). He demod one of the two Christie S12 DLP projectors that he will be
putting in his new room which will do 3D, too. (Per the member: The S12 utilizes a 1.9kW Ushio Xenon short-arc illumination system for 12000 ANSI lumens. Based on 1.1 cinema dark 3-chip DLP technology, the S12 delivers vivid images with picture-perfect 10bit deep color reproduction. Built-in shutter, easy set-up with no convergence.)

Apparently Paul McCartney used 18 of these projectors in his last tour, and then after the tour they were up for sale - CHEAP!!! So the member picked up two of them. They are 2K units. The member has also picked up the theater lens, so when he wants to change from 2:35 to 1:85, pop in the lens.
I ain't no expert on this stuff but the member will be adding an iris and other mods to the projector.

Even with brightness down all the way, on the member's 10' wide screen,
the picture was amazing. Though of course parts were too bright. But once its setup with the 40 foot Torus should be amazing!!!@@

This club member doesn't like his name being used publicly, so lets just refer to him as "M". Alan Gouger knows "M" well and I'm sure Alan will keep his true identity on the "Q" as well.

"Doug Winsor" used to troll at some AV Forums as "Steve Bruzonsky"! My home theater at:

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post #515 of 522 Old 01-28-2009, 01:09 PM
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Great but...

Please let's not start throwing the term TORUS around so loosely, the term is compound curved screen, a Torus has to be ray traced to the room.


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post #516 of 522 Old 01-28-2009, 01:30 PM
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Quote:
Originally Posted by CINERAMAX View Post

Great but...

Please let's not start throwing the term TORUS around so loosely, the term is compound curved screen, a Torus has to be ray traced to the room.

When "M" said he's putting in a Torus screen that's exactly what he meant.
"M" maintains a low profile by not web posting but I assure you he knows everything you say, post and show here on AVS and elsewhere on the web. HA! I'm sure he's read and investigated all the stuff to do his digital cinema including 3D right!!!

"Doug Winsor" used to troll at some AV Forums as "Steve Bruzonsky"! My home theater at:

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post #517 of 522 Old 01-28-2009, 03:04 PM
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Quote:
Originally Posted by cal87 View Post

This is certainly a new and interesting problem. In order to maximize picture quality, i.e. avoiding a possibly detrimental ND filter, people are having to consider BIGGER screens than they were originally planning.

I was originally planning on an 11 foot CIH screen. With the Lumis numbers I am seriously considering a 12 foot CIW screen firehawk. I have the room and have a line on a bargain for one of those. Also CIW sounds like it will be more 3D ready.

Can anyone point to gotchas in my thinking?

Thanks
Christy
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post #518 of 522 Old 01-28-2009, 03:10 PM
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I do CIW and I love it.
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post #519 of 522 Old 01-28-2009, 06:24 PM
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Quote:
Originally Posted by Christy Warren View Post

I was originally planning on an 11 foot CIH screen. With the Lumis numbers I am seriously considering a 12 foot CIW screen firehawk. I have the room and have a line on a bargain for one of those. Also CIW sounds like it will be more 3D ready.

Sounds reasonable to me. I'm thinking along similar lines. I was considering a non AT setup, smaller screen. If I go larger and (uP) AT I get 2 hits on brightness, both being good for buring some extra ftL. The limiting factor becomes seating distance for my new theater. Still mulling that over... Can't speak to 3D, Peter's the fan there.


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post #520 of 522 Old 02-01-2009, 11:41 AM
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Quote:
Originally Posted by Mark Petersen View Post

Very interesting. I would think that the other drawback of a traditional iris in the lens approach is a reduction in ANSI contrast because of an increase in backscatter as the iris aperture is reduced. DMD?

The reduction in ANSI contrast is probably not due to the backscatter from the blackened IRIS. I have not done a scatter analysis of the RS20 but I doubt it is coming from the IRIS at the stop position. What is probably happening is that there is a multiple scatter path that goes through the part of the stop that is not blocked as you decrease the IRIS . As you stop the system down you decrease the amount of light going to the image but do not reduce the scattered light thus you decrease the ANSI contrast.
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post #521 of 522 Old 02-01-2009, 12:55 PM
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Quote:
Originally Posted by mlang46 View Post

The reduction in ANSI contrast is probably not due to the backscatter from the blackened IRIS. I have not done a scatter analysis of the RS20 but I doubt it is coming from the IRIS at the stop position. What is probably happening is that there is a multiple scatter path that goes through the part of the stop that is not blocked as you decrease the IRIS . As you stop the system down you decrease the amount of light going to the image but do not reduce the scattered light thus you decrease the ANSI contrast.

I'm sorry could you clarify this ? Mutiple scatter pathe by that not blocked ?

Art


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post #522 of 522 Old 04-15-2012, 03:27 AM
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Is there a review on the 3ds? Cant seem to find the right thread
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