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Quote:
Originally Posted by tyree91 /forum/post/0


The RS-232 is a DB9 connector on the Scaler. The interface from the Scaler to the projector is HDMI. I've got their color brochure with a photo of the Scaler connections. The IR extension and the 12V triggers are on the Scaler as well as an AV receiver loop on HDMI. Hope this helps.

Could you can and post this brochure for all to see?


Thanks
 

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Well done, given this it will work for me after all, my screen is slightly smaller at 106" diagonal and I currently have the center channel on the floor and point slightly upward. Future plans did include a riser for the rear seats for a 'mini stadium' view over those in front... could work out fine.


What was the throw for this going to be like, my room is about 21' long

Quote:
Originally Posted by Bob Sorel /forum/post/0


Ok, I've created a sample installation so that people could get an idea of what 27% offset will mean in real life. I am going to use a standard 8' (96") ceiling for my example, and I am going to assume that I am able to build a "hugger" ceiling mount for the projector in order to get it within 4" of the ceiling. Also, I am going to use my actual screen, a 16:9 100" X 56" wall mount (114" diagonal) with 1.5" frame all around. Here's how it fits:


96" total height

92" high is center of lens (4" down from ceiling)

77" high is top of viewable screen (I rounded off 15.12" to 15" - top of frame would be 78.5" high)

21" high is bottom of viewable screen

19.5" high is bottom of frame


Using a 114" diagonal screen in an 8' room, "hugging" the ceiling with the projector would then leave you with 19.5" below your screen to place your center speaker, or you could mount it above the screen since your screen will be 78.5" down from the ceiling (Edit: oops, that's 78.5" up from the floor), giving you 17.5" above to work with.


Now, if you increase the size of the screen, don't forget that the screen will need to mount lower on the wall, as the 27% of screen height offset will increase as the screen gets larger.


If you use a more normal mount with a drop of 8" instead of 4", shift everything down 4".


You can also "fudge" things a bit by tilting the projector in order to mount the screen up higher and/or use a larger screen, but make sure you have a fairly wide black border to absorb the slightly trapezoidal image that will result from tilting the projector.


I have provided this example just so that people can get a feel for how this projector will or will not fit into their particular plans.


I have a 7' ceiling and my center speaker speaker measures 72" X 18" X 18" (yes, it really is that huge!), so unfortunately the HD81 won't work for me.
 

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I have a 120.5" screen and an eight foot ceiling. I have roughly 15-16 inches from the ceiling to where my screen starts (past black border). Center channel is below the screen. So with my screen being 59 inches tall, does this mean this PJ will NOT work for me as well?
 

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From my CES Report:


Best Front Projection 1080p -- Optoma H81: Without a doubt the best front projector demo that beat the six-figure competitors. I don't know if someone had fully tweaked both the projector and the source material, but all in our group agreed that the Optoma H81 blew away all other demos of DLP projectors. Amazing black levels, color saturation, and most of all, smooth and detailed picture resolution.


Good News - Bad News: In March, Toshiba will release two HD-DVD players at $499 and $799 MSRP. A number of movies will be released at this time. The bad news is that due to HDMI compatibility issues, the movies will be released in the 1080i format. Since most people have digital displays at native 720p, or hope to someday have a 1080p display device, the use of 1080i is disappointing but it seems a necessary evil to ensure that HD-DVD will play on as many systems as possible.
 

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Quote:
Originally Posted by HiHoStevo /forum/post/0


Bob, glad you came back in to quiet all the excitement about a "negative" offset and no lens shift...

My first question would have been... "has anyone ever seen a projector with a negative offset?" What would be the purpose of this design... and who was it designed for?

Some of the JVC projectors had a 40% offset, IIRC (SX21, HX1/2, HD2K?). The way JVC measured offset, this put the bottom 10% of the image below the lens centerline. Also, I think the Panasonic LCD projectors also had this as well, before Panasonic got lens shift religion with the AE500 (?).


I am another of the H7x owners who, it looks like, Optoma no longer wants as a customer (need that lens shift!). So, hopefully the Sharp won't be absurdly priced, nor have an excessively short throw.


Later,

Bill
 

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Bill I don't think Optoma is trying to "dis" there current 7x customer base by leaving out the lens shift.... rather the business projector they used as a basis for the H81 was probably the only box currently available that could handle the DMD size and lens they needed to use.


It is undoubtably a series of compromises to get the machine on the market to blunt the Ruby freight train. We all speculated that the DLP manufacturers had to do something to respond to Ruby as Sony definitely caught TI in napping mode. It seems that Optoma was the manufacturer that was able to respond the quickest and as such will be rewarded with a bunch of sales that would have otherwise gone to the Ruby... Is it a perfect solution... nope, but I am guessing that Tzun and company already have a team assigned and working hard to bring out the next model that will use this DMD and the Brilliant color technology.


And I Carnac jr. proclaim it WILL have lens shift.........!! Of course now if I could predict when it would show up... then I would be a true prognosticator!
 

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Quote:
It is undoubtably a series of compromises to get the machine on the market to blunt the Ruby freight train.

Steve, it is one thing to try to capture some sales that would otherwise go to the Ruby, but it is also quite another to alienate their already loyal following. Optoma customers are used to having lens shift. If they take that very important feature away by putting the new DMD into a presentation frame/light engine, they will probably sell some of these to their business customers, but they are leaving a bad taste in the mouths of the loyal home theater crowd. Sure, some people will be able to use the presentation offset, but many will be left out in the cold. At first I blamed TI for getting caught with their pants down, but the more I think about it, the more I have to agree with an earlier poster who mentioned that Optoma must have at least known the size of the DMD well in advance of its release. I have to believe that they have had at least a year to prepare some sort of light engine for the new DMD and not have to resort to using a presentation engine. Maybe I'm wrong. Where is Tzung?


I don't know how many people are in the same boat as I, but I was waiting to find out what showed up at CES before making my next purchase. I had high hopes for the HD81, and I would even consider waiting as long as March to buy one if I could possibly use it in my theater. Seeing that no one else seems to be releasing anything any sooner, it looks like I will be buying a Ruby, warts and all, simply because I don't have any other option other than waiting and hoping. If I buy a Ruby now, at least I can get a year or maybe more of 1080p enjoyment before the DLP people get settled with 1080p offerings. What I really long for is a 3 chip 1080p DLP, and based on how long it is taking just for the single chippers, I fear that affordable 3 chippers will be at least a year away, probably a lot longer. So do I wait a year or whatever for Optoma to release a lens shift version of the HD81 or do I buy a Ruby now?


Please don't take this as Optoma bashing and/or Ruby praising. I have no particular affection towards Sony and their products, but unless Optoma offers a lens shift version OR can at least drastically reduce the offset (if that could be done without a major redesign), I am FORCED to look elsewhere. I would prefer to buy an Optoma if they would offer one I could use!
 

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Quote:
Originally Posted by Bob Sorel /forum/post/0


I have no particular affection towards Sony and their products

I would think that EVERY HT enthusiast would have affection towards Sony right now, if only for completely redefining the price/performance curve!
I suspect that a Ruby is not in my future (too long for my shelf mount needs), but I do send warm, positive thoughts towards that billion dollar plant in Pittsburgh that necessitated Sony pursuing a mass-market strategy with SXRD.


As for knowing the dimensions of the 1080p chip, I'm not sure we can actually say what the manufacturers knew and when. In reality, they had a few basic issues:
  • Pulling together a processing solution that can deal with 1080p
  • Tweaking the reference motherboard design to fit their needs
  • Deciding between dropping the chip into an existing light engine and having a much shorter throw as a result (Sharp 20K?), or cutting new glass to maintain/extend the throw range (Optoma and PD kind of cheated here by having SXGA models already)
  • Hitting a $10k MSRP that allows them to be profitable in the first year, knowing that Sony will have almost a year's head start on them, with discounted pricing to follow.

Basically, I agree that Optoma chose the best route available to hit TTM (time-to-market) considerations. By the time the HD82 (or whatnot) shows up, with lens shift, it will probably be CEDIA, at the earliest. I'm just not going to be in the market for an Optoma machine until the lens shift makes it back in. Fortunately for them, most of my HT budget for the year is already slated for HD-DVD/BDA source components and software.



Later,

Bill
 

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Quote:
Originally Posted by Bob Sorel /forum/post/0


Expletive, good points! Since the scaler is a totally separate unit connected vis standard HDMI, why not add the lens shift back and make the scaler an option? I know that this is self serving, but I'll bet that a LOT of people would prefer this route, if the HD81's release configuration is not already written in stone. Just food for thought...

Completely agreed. A lot of customers who are in the market for a $10K projector will already have a scaler, but the lack of lens shift rules this projector out entirely--scaler or no scaler--for a lot of people (including me). Oh well.
 

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I would assume they won't add the lensshift back in this unit because they don't have a lens to use right now, in other words, they (or whoever builds these for them) need to design one, which will take time...
 

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The link to the photos in my Optoma HD81 CES 2006 Pics & Screenshots - Best HT Projector at the Show - thread is now fixed if anyone is interested.
 

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Quote:
Originally Posted by Bob Sorel /forum/post/0


I don't know how many people are in the same boat as I, but I was waiting to find out what showed up at CES before making my next purchase. I had high hopes for the HD81, and I would even consider waiting as long as March to buy one if I could possibly use it in my theater. Seeing that no one else seems to be releasing anything any sooner, it looks like I will be buying a Ruby, warts and all, simply because I don't have any other option other than waiting and hoping. If I buy a Ruby now, at least I can get a year or maybe more of 1080p enjoyment before the DLP people get settled with 1080p offerings. What I really long for is a 3 chip 1080p DLP, and based on how long it is taking just for the single chippers, I fear that affordable 3 chippers will be at least a year away, probably a lot longer. So do I wait a year or whatever for Optoma to release a lens shift version of the HD81 or do I buy a Ruby now?


Please don't take this as Optoma bashing and/or Ruby praising. I have no particular affection towards Sony and their products, but unless Optoma offers a lens shift version OR can at least drastically reduce the offset (if that could be done without a major redesign), I am FORCED to look elsewhere. I would prefer to buy an Optoma if they would offer one I could use!

I am in the very same boat and my thoughts are quite the same. However, I'm prepared to live with 720 for a while longer until things sort themselves out and am focusing on calibration and optimizing my Optoma (sorry) H79 until CEDIA. After that, it'll be a ~7-8K$ street priced Ruby (II?) or single chip 1080 DLP with lens shift. I, too, doubt that any 3-chip DLPs will be in that price neighborhood for a couple of years, but 1080 LCOS or LCD offerings may be very interesting by then.


Dan
 

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TzungILin,

Hopefully, your adjustable iris will have enough range to reduce the light output and bring up the contrast to lets say, in marketing speak, to 9,000:1. With Optoma's traditional discount off MSRP, and flexibility in the light output and contrast, would make this projector a winner.
 

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Can Someone Tell Me If The Hd72 Can Be Mounted Between The Top And Bottom Of The Screen Or Does It Have To Be Above The Border Like The H81? Thank You Very Much. Sam Zeoli
 

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Quote:
Originally Posted by mdputnam /forum/post/0


TzungILin,

Hopefully, your adjustable iris will have enough range to reduce the light output and bring up the contrast to lets say, in marketing speak, to 9,000:1. With Optoma's traditional discount off MSRP, and flexibility in the light output and contrast, would make this projector a winner.

I like the adjustable iris also, but I doubt it will affect the contrast ratio much in my room. I think at full open that the projector may be too bright(at least with a new bulb) on certain screens. It would also allow you to open it up when more ambient lighting is present. I would hope it would also be powered since it looks like most people that would buy this projector would have at least 9 foot ceilings.


I copied the following post from another thread. I've been reading this forum a long time and have come to respect Alan Gougers's opinion. I think it is unusual to have someone selling projectors to be so honest as Alan. I have never suspected him of even exaggerating about one technology or the other for personal gain, he just tells it the way he sees it. So here is where a 4000:1 contrast ratio projector beats a 15000:1 contrast ratio projector. He's talking about the 3 chip Mercury.



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Quote:

Originally Posted by Tryg

Alan, lets not be cryptic


Is the picture from this 720p projector better than the 1080p Ruby?




Clearly in every way. Ive invited Darin and we will get together in a few months to have a look at some of this side by side.


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The Optoma HD81 was also the best projector I saw at the show, and the scaler is most impressive in number of inputs and features. Sony didn't even have the Ruby hooked up; the only place to see one in Las Vegas was the Sony Style store in the Forum mall.
 

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Quote:
Originally Posted by guitarman /forum/post/0


True I'm not bothered buy the rainbow effect but I could bring them out with projectors if I tried. Same for Wing, he tried also. I'm not sure if this will help people that get eyestrain. Chances of reports from rainbow people are a low percentage prop.


Oh, I didn't gamble much but beat Winn's new Casino for a clean $1200, thx Mr. Winn.



Wing and Tz, I'm not rude at not showing at your party, thanks for the invite. I was there on line to go in but I travel in Las Vegas with running shoes on. They threw me off the line (no sneaker guys allowed) Sorry. But I did hit thier Casino for the $1200.


I am somewhat suseptible to eyestrain with 1 chippers but had absolutely no difficulty with the Optoma H81 (unlike the Infocus demos). I stayed for quite some time, and could have easily stayed there all weekend..



For my humble experience, this was the projector to come closest to the ideal size, brightness, detail, color saturation, and smoothness of image.


A real beaut...



Oh yeah, thanks Sony for having the Ruby on display..... on a pillar.
 

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Guys,


There are some creative ways to use a high offset projector in low ceiling or type of enviroment.


Here is an install of HT1000 in a 7 foot ceiling HT.




How did he get a high offset projector down so low? Digital keystone correction? Nope. Serious overscan? Nope.


He tilted the projector up slightly and the screen forward slightly. A 5 degree tilt will give you 1 inch vertical image shift per foot of throw.


With the specs Tzung posted earlier, on the H81, it works out to about 4 degrees of tilt to turn it from a 27% to 0% offset projector. (0% means the lens lines up with the top edge of the picture.)


Some tilt is actually visually appealing IMO. 4 degrees is definitely not too much. Here is rough sketch if you still don't quite follow me:




The sketch is only for reference. (I free-handed it and then told the program to rotate it 4 degrees - I think it actually turned out fairly accurate)


This level of tilt is not objectionable. For the person in the chair the tangent line is still above their eyes so it doesn't look like the screen is falling forward.


Anyway, where there's a will there's a way. High offset is not that difficult of a problem to overcome.


-Mr. Wigggles
 

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There's a couple of side benefits to this:


1. Less reflection from high mounted lights


2. As Peter (Cineramax) pointed out, this reduces visual keystoning from the top of the screen being farther from your eyes than the bottom
 
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