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Poor Folks with 8" projectors
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WanMan



Joined: 19 Mar 2006
Posts: 10270


Posted: Sat Jun 06, 2009 12:59 pm    Post subject: Poor Folks with 8" projectors

I am keying off of the follow reply posted in another thread:

MikeEby wrote:
Kiev Savoie wrote:
ok but what about custom resolutions like 800 x 1920 where you get rid of the unused bars on the top and bottom of a 2.35:1 movie? wouldn't that make a difference on your G70 which as you say does not fully resolve 1080p? And wouldn't that also be less demanding of your projector?


Not sure why but on my XG I tried 1920X800 and it was not much sharper then 1080p.

I've been running 1600X900@72Hz from my HTPC for some time. Seems like a decent compromise for us poe-foke with 8" projectors. If your running an HTPC the little test pattern application I wrote some time ago has a 1 on 1 off patterns to see how well your projector is doing at a given resolution.

http://www.curtpalme.com/forum/posting.php?mode=editpost&p=108563
Download Here!
Mike


Other than Mike and myself, who else falls into the category? With the basement project eating cash faster than I can eat hotwings and look at p0rn, the idea of being able to 'step up' to the next level seems bleak. This itself presents a philosophical issue with me in that I see no reason to pay for pixel resolution (in the source) when I cannot display it in a manner to skit certain video anomalies due to constraints.

And while the wife has 'other' ideas in the projector market, I can am not [yet] willing to consider them. Thus, I wonder how many others with HD sources are displaying less than 1920x1080 coming from the source because of their poor financial conditions?

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garyfritz



Joined: 08 Apr 2006
Posts: 12088
Location: Fort Collins, CO

Posted: Sat Jun 06, 2009 1:50 pm    Post subject:

My HT doesn't get enough use -- nor enough love from my wife, who is not a big movie fan -- to justify much investment. I happen to be feeding my 8" 8500 a 1080p signal, but only because it's easy to do with a PS3 and I prefer it over 1080i or 720p.
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BradTheAggie



Joined: 08 Mar 2006
Posts: 651
Location: Oak Point, Texas

Posted: Sat Jun 06, 2009 1:52 pm    Post subject:

I use 1080i on my 8000, and am very happy with it. Can't justify spending more when I don't use it that much...
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ecrabb
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Joined: 13 Mar 2006
Posts: 15909
Location: Utah

TV/Projector: JVC RS40, Epson 5010

Posted: Sat Jun 06, 2009 1:56 pm    Post subject:

Same here, Gary... 1080p from a PS3 to my G70. Looks incredible. My wife actually loves movies, and we try to make it down to the HT at least once or twice a week... But, it'd be a tough sell to spend a LOT more money considering how great of an image I already have.

Wan, you sure make me think sometimes about what the hell you're really getting at!

Look, there are a whole slew of us with 8" machines that won't fully resolve 1080p. But, I suspect most of our choices have less to do with "poor financial conditions" and more to do with picking the projector that best fits our "bang for buck" desires and spending comfort level. Personally, I'm thrilled to have the machine I have for the money I spent on it. I could afford to sell my G70 and scrounge up a nice used G90, 9500, or 1209... But personally have little to no interest in dropping the extra $2000-3000+ to get a machine to best the picture I'm already watching in my HT.

As for your philosophical issue of not paying for pixel resolution in the source you can't see, that's simply a false choice. While it's true that you can't see ALL of the source resolution, you can see MOST of it. In seeing most of it, the difference between Blu-ray and the FAR inferior alternative (DVD) is so stark, plainly obvious, and in-your-face, that there's no point in discussing the issue further! Really, its that clearly different. So, there is not philosophical issue. We're not even considering the far superior audio experience Blu-ray has to offer, regardless of the projector you choose.

So, there are really only two alternatives to consider: Keep your 8" machine and enjoy something close to 90% of the spatial resolution with a smooth, film-like image, or spend another couple of grand on a 9" machine or a digital to view 100% of the spatial resolution Blu-ray has to offer, each choice with its advantage and disadvantages over your current machine. You consider your financial situation and decide what's best for you.

SC
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Kiev Savoie



Joined: 25 Oct 2007
Posts: 432


Posted: Sat Jun 06, 2009 2:42 pm    Post subject:

Well, for me that post was not motivated by finances. The G70's i have came my way at an outstanding price. this will be my first EM/LC machine and i stay active on this forum just trying to learn everything i can so i can get a better eye for video quality and appreciate the difference this upgrade will make. For me things have been happening almost too fast. i expected to play with my Barco 1208 for another 6 months to a year tweaking it till i ran out of things to try. Now that i have the G70's just sitting in storage though, I've reluctantly come to the conclusion that it's time to wrap up the 1208 and move on. Anyway the way prices are falling I don't see why anyone who really wants one can't get a decent deal on a 9" machine in the next year or two. I won't make that jump myself until i'm good and ready this time, i really want to see just what i can do with a top of the line 8" machine before moving on. it would seem like a waste not to.
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kal
Forum Administrator


Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada

TV/Projector: JVC DLA-NZ7

Posted: Sat Jun 06, 2009 2:47 pm    Post subject:

I'd have a 9" if I had room. They all require too much throw distance which places them all in the walk area of my second row of seats. The HD-215 lenses on my Zenith1200 are extremely short throw such that the projector's 100% over the first row and away from anyone bumping their heads.

Though I have toyed with the idea of trying to get a Cine 9 to fit. I just don't look forward to the 40+ hours of from the ground up setup time (since I'd redo the magnetics from scratch). For most content I doubt it'd even notice much of a difference from what I have now with what's essentially a Cine 8. Would give me the same accurate primary colours, same light output (12-13ft/L), same LC optics & contrast ratio, fairly similar high bandwidth video chain, etc. Slightly more resolving power yes, but unless you spend your days watching test patterns or an HTPC desktop you'd not notice it much.

Kal

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Last edited by kal on Sun Jun 07, 2009 2:05 pm; edited 1 time in total
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Kiev Savoie



Joined: 25 Oct 2007
Posts: 432


Posted: Sat Jun 06, 2009 2:55 pm    Post subject:

I'm really surprised to hear that Kal. I guess for your situation an 8" machine does make sense though.
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ecrabb
Forum Moderator


Joined: 13 Mar 2006
Posts: 15909
Location: Utah

TV/Projector: JVC RS40, Epson 5010

Posted: Sat Jun 06, 2009 3:10 pm    Post subject:

Actually, an 8" machine makes sense for a lot more people's situations than you'd think. A lot of people in this forum have viewing distances and screen sizes that would make it difficult to even see the difference between an 8" and 9" machine, anyway! Unless you're sitting well inside 12' from an 8' wide screen (110" diag), you'll never see the additional sharpness the 9" provides. How many people here are inside 1.2x screen widths.

Kal, what's the typical difference in throw distance between our 8" machines and a 9" machine? I forgot all about that. I guess I won't be going to a 9" machine or digital anytime soon, either. My throw distance is probably too short for a 9" machine OR a digital... and I am NOT tearing apart my theater again anytime soon. I like watching movies too much.

SC
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bbfarmht



Joined: 27 May 2006
Posts: 1273
Location: Where the Mississippi runs east to west!!

Posted: Sat Jun 06, 2009 3:53 pm    Post subject:

ecrabb wrote:
I guess I won't be going to a 9" machine or digital anytime soon, either. My throw distance is probably too short for a 9" machine OR a digital... and I am NOT tearing apart my theater again anytime soon. I like watching movies too much.

SC


One of the other advantages to a digital is you could recess it into the back wall if you needed the extra throw. I still wouldn't go digital though.

I too am running an two 8" machines. Well one isn't completely an 8" machine. I don't plan on making a outrageously large screen. I do plan on making it setup for 2.35:1 so I can do it in the future. As far as going to a 9" I don't think I'll ever get there. By the time I can afford one the digitals should be of good enough quality to go that route.

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akajester



Joined: 09 Jul 2008
Posts: 934
Location: Wisconsin

Posted: Sat Jun 06, 2009 4:16 pm    Post subject:

I got a great price on a barco graphics 808 and have enjoyed building my room around that. We're a single income family with 3 kids, so a dedicated room didn't make much sense, it's more multipurpose. I'm still tweaking the barco and feel I'm at 90% of what the unit can offer. I run 720p from an htpc and xbox 360. I've done 1080i from the htpc and it looks a little sharper but I feel it makes a few flaws more noticeable. Hopefully once I get those ironed out I can stay at 1080i. Otherwise, I love the picture this thing puts out at 720p, part of me doesn't want to mess with it much more. My family loves it and anyone that stops by says it looks great. I wouldn't turn down a 9" set if it dropped in my lap, but I'm in no hurry!
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J Kildare



Joined: 28 Sep 2006
Posts: 164


Posted: Sat Jun 06, 2009 5:19 pm    Post subject:

From a guy who just jumped from an 8500 to 9500lc.

My 8500 had hd144 lenses, and MP mods with 400 hr tubes when I tore it down for the conversion.
Now it was extreme raster size to be sure, 1/16" from both sides. I could not adjust skew one click without hitting the edge. When I tore it down I was doing 1080p @ 72 thru a vp50 with scan lines thru the middle 2/3 of screen. The pic was incredible, with lots of 3d punch. I attribute a lot of this to the setup, screen and the fact that my walls are basically black material that eats up almost all reflections.

I have just spent a lot of time setting up the 9500lc with the same video chain. I did however add frankenyokes, and my raster is a lot more conservative, about 1/2" each side to allow for a slightly larger screen. The sharpness is about the same, partly because of the smaller raster and partly because of LC. I am now using g90 Hd10f lenses, so the corner focus is a little better. The pic is very close at first glance. I notice a slight difference in background detail, and a slight difference in 3d.

For most people the difference could be made up a lot easier with a VP and room treatment of some sort, providing you start with a really tight machine. For example, my ceiling is painted Benjiman Moore ultra flat black, and yet it has 10 times the reflections of the GOM fabric.

Nobody talks room treatment.......


Its Huge!!!!

In my gallery there is a pic of the darkest black carpet I could find along with black berklines, they are lit by 50w mr16 lamps. You can see the difference in reflections pretty quick...... and there goes the contrast.

Jim
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garyfritz



Joined: 08 Apr 2006
Posts: 12088
Location: Fort Collins, CO

Posted: Sat Jun 06, 2009 6:07 pm    Post subject:

ecrabb wrote:
While it's true that you can't see ALL of the source resolution, you can see MOST of it.

Out of curiosity, how much of the 1080p resolution are folks seeing?

Mine isn't fully 100% resolving it, but it does darn well. Try displaying the attached 1-on-1-off pattern if you have an HTPC or PS3. On my 8500 the horizontal lines are fully and cleanly resolved over most of the screen. The vertical lines are a bit beyond the 8500's bandwidth capabilities, but they're still there. If you view this pattern from a distance, it looks like a checkerboard, because the vertical-line squares are significantly darker than the horizontal-line squares. But looking up close, you *can* see the individual lines even in the vertical sections.

I figure if the projector can visibly resolve 1080p vertical 1-1 lines, it's going to show at least 90% of the actual picture content in any Blu-Ray movie source.



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draganm



Joined: 08 Mar 2006
Posts: 8990
Location: Colorado

Posted: Sat Jun 06, 2009 6:52 pm    Post subject:

J Kildare wrote:
I have just spent a lot of time setting up the 9500lc with the same video chain. I did however add frankenyokes, and my raster is a lot more conservative, about 1/2" each side to allow for a slightly larger screen. The sharpness is about the same, partly because of the smaller raster and partly because of LC. I am now using g90 Hd10f lenses, so the corner focus is a little better. The pic is very close at first glance. I notice a slight difference in background detail, and a slight difference in 3d. Jim
well electronically they are identical, so if you squeeze down the 9" tube it will be the same as a maxed out 8 inch. If you want to take another step forward in sharpness you should consider my upgrade pacjage.
The other thing you forgot to mention is the LC should be free of Halo's and have better ANSI contrast at all times. I would expect this to be a significant difference no?
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draganm



Joined: 08 Mar 2006
Posts: 8990
Location: Colorado

Posted: Sat Jun 06, 2009 6:56 pm    Post subject:

garyfritz wrote:
The vertical lines are a bit beyond the 8500's bandwidth capabilities,
Ummm, no they're not Smile there is simply not enoughtspace on the 8 tube to firt them vertically with the raster squeezed.


garyfritz wrote:
I figure if the projector can visibly resolve 1080p vertical 1-1 lines, it's going to show at least 90% of the actual picture content in any Blu-Ray movie source.
I agree with that , on a well set-up and good running 8500 you should see 90% of 1080P content.
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ecrabb
Forum Moderator


Joined: 13 Mar 2006
Posts: 15909
Location: Utah

TV/Projector: JVC RS40, Epson 5010

Posted: Sat Jun 06, 2009 8:13 pm    Post subject:

draganm wrote:
garyfritz wrote:
The vertical lines are a bit beyond the 8500's bandwidth capabilities,
Ummm, no they're not Smile there is simply not enoughtspace on the 8 tube to firt them vertically with the raster squeezed.

Eh? What does raster squeeze have to do with vertical lines (horizontal resolution)?

Horizontal resolution is all about the control of the beam current - the video amplifiers' bandwidth and slew rates. While the area a 9" tube provides certainly makes it easier to get a sharper image, no CRT projector that I'm aware of can perfectly faithfully reproduce alternating black/white lines (a square wave) at the high frequency 1920x1080p requires. Luckily, we don't watch alternating vertical black/white lines in movies, so it isn't an issue on 99.9% of program material.

SC
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WanMan



Joined: 19 Mar 2006
Posts: 10270


Posted: Sat Jun 06, 2009 8:24 pm    Post subject:

But the alternating black/white lines do an excellent job mimicking the the line-pairs that our eyes need to discern one piece of information from the next. Smile

And SC, what I was getting at without just coming out and Crayola-ing it Smile is that when it comes to projecting 1920x1080P the costs of entry to the user is higher in the analog world.

I think I need to assist one of the 9" folks to their grave and hawk their surviving spouse for an affordable buy. Very Happy

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draganm



Joined: 08 Mar 2006
Posts: 8990
Location: Colorado

Posted: Sat Jun 06, 2009 8:35 pm    Post subject:

ecrabb wrote:
Eh? What does raster squeeze have to do with vertical lines (horizontal resolution)?

Horizontal resolution is all about the control of the beam current - the video amplifiers' bandwidth and slew rates. While the area a 9" tube provides certainly makes it easier to get a sharper image, no CRT projector that I'm aware of can perfectly faithfully reproduce alternating black/white lines (a square wave) at the high frequency 1920x1080p requires. Luckily, we don't watch alternating vertical black/white lines in movies, so it isn't an issue on 99.9% of program material.

SC
Gary said that 1080P vertical lines are beyond the MArquee's bandwidth, inplying that a MArquee electronics cannot fully resolve 1080 vertical ines. that's far from true, with raster expanded vertically to it's normal range, scan lines for 1080P are very visible even on an 8500. The problem lies when you squeeze the vertical size down, they will overlap on an 8500 and not fully resolve each line. since a 9" tube is taller, you should be able to squeeze it down and still be able to fully resolve 1080.
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ecrabb
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Joined: 13 Mar 2006
Posts: 15909
Location: Utah

TV/Projector: JVC RS40, Epson 5010

Posted: Sat Jun 06, 2009 8:45 pm    Post subject:

WanMan wrote:
But the alternating black/white lines do an excellent job mimicking the the line-pairs that our eyes need to discern one piece of information from the next. Smile

True, but the black/white lines represent a worst/best case scenario - a situation which rarely exists in program material (or in the real world for that matter). If you're you looking at anything lower-contrast... say, 30 and 70 IRE alternating lines, the projector will more faithfully reproduce it, but your eyes will be less capable of discerning it (or you'll need to be closer).

WanMan wrote:
And SC, what I was getting at without just coming out and Crayola-ing it Smile is that when it comes to projecting 1920x1080P the costs of entry to the user is higher in the analog world.

I completely disagree. You're not comparing apples to apples. If you're talking about a $4000 or $5000 9500 or G90 and comparing it to a $2000 1080p digital, then it's really not a fair comparison. The cheap digital is not in the same league with those machines.

If you're going to compare CRT and digital, you need to be comparing the 9500 or G90 to much higher-end digital... Say, an RS20 or at least an RS2. In actuality, the still (relatively speaking) high barrier of entry to GOOD 1080p digital projection is exactly what has forced the prices of GOOD analog CRT down into the same price range as what a high-end RPTV might have cost only 5 or 6 years ago. Of course, the trend will only continue... Which, to be perfectly honest, is another reason I wouldn't buy a 9" machine unless I could steal it. In a year or two, you'll be able to buy a 9" machine or a comparable digital for under $3000. Hang up your XG, watch some damn movies, and upgrade if you get the itch.

WanMan wrote:
I think I need to assist one of the 9" folks to their grave and hawk their surviving spouse for an affordable buy. Very Happy

Upgrade-itis can make you do some crazy things. You only live once, Wan! If you think you need the best you can buy, do it. But, you might want to get your walls painted, get some carpet and chairs in there, and set up that XG and see how you like it before you do anything crazy!

SC
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ecrabb
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Joined: 13 Mar 2006
Posts: 15909
Location: Utah

TV/Projector: JVC RS40, Epson 5010

Posted: Sat Jun 06, 2009 8:49 pm    Post subject:

draganm wrote:
Gary said that 1080P vertical lines are beyond the MArquee's bandwidth, inplying that a MArquee electronics cannot fully resolve 1080 vertical ines. that's far from true, with raster expanded vertically to it's normal range, scan lines for 1080P are very visible even on an 8500. The problem lies when you squeeze the vertical size down, they will overlap on an 8500 and not fully resolve each line. since a 9" tube is taller, you should be able to squeeze it down and still be able to fully resolve 1080.

You're mixing up vertical and horizontal. What Gary was referring to was that the Marquee can't resolve *1920 VERTICAL* alternating black/white lines perfectly... It can't (no CRT projector can), and raster squeeze has nothing to do with that. I think Mike Parker has pushed these bad boys about as far as they'll go - and they're damn good - but, it's still far from a perfect digital-style square wave. Fortunately, that's not a problem. We wouldn't like if if they could reproduce that square wave perfectly... It would just faithfully reveal the pixels in the source... Something we CRT'ers are happy to avoid.

Slightly touching scan lines and a touch of horizontal bandwidth smear isn't necessarily a bad thing.

SC
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winduptoy



Joined: 25 Nov 2006
Posts: 187
Location: Lunenburg, Nova Scotia

Posted: Sat Jun 06, 2009 9:22 pm    Post subject:

In a perfect world I would go for a 9" machine, but it would be an expensive upgrade since a larger house would be required. Until that happens I'm quite happy with the G70.
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