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jeffslife
Joined: 17 Apr 2010
Posts: 4190
Location: ohio usa
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| Posted: Sat Jun 07, 2014 3:33 pm Post subject: How big of an image can a digital pj make ? |
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In 4k ? I am just curious. 1080P too if you happen to know.
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sat Jun 07, 2014 3:53 pm Post subject: |
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How many lumens is the projector what's the screen gain?
You can project the size of a building if you want.
It depends on the light output of the projector and what kind of black level you are looking for.
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Sat Jun 07, 2014 4:14 pm Post subject: |
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Like Jeremy says, you can do anything you want. Even more than black level, it depends on room size and budget. Other than affecting the price, the resolution has nothing to do with it; it's all about how bright the projector can go.
Some of the big DLP machines from DPI and Sim2 will light up a 15 or even a 20-foot wide 1.0-gain screen to levels that are even 2-3 times what you're accustomed to seeing. Some will go even bigger, and you can stack 2, 3, 4, or more to go bigger, or make images in bright conditions. Those are mostly 1080p machines.
The few consumer 4k projectors available right now like the Sony VW1100 and VW600 are medium-sized projectors. A $15k Sony VW600 at around 1500 lumens is plenty bright. I saw one on a 10-foot wide Screen Innovations Black Diamond Slate (1.2 gain) a few weeks ago, and it was gorgeous. Insanely bright, like a giant plasma. I think you could easily go a little larger… Maybe even 12-foot wide with a good 1.3-gain material.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Jun 07, 2014 5:30 pm Post subject: Re: How big of an image can a digital pj make ? |
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| jeffslife wrote: | | How big of an image can a digital pj make ? |
As big as the lens will allow it to focus. Has nothing to do with light output or screen material.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Sat Jun 07, 2014 6:19 pm Post subject: Re: How big of an image can a digital pj make ? |
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| macgyver655 wrote: | | jeffslife wrote: | | How big of an image can a digital pj make ? |
As big as the lens will allow it to focus. Has nothing to do with light output or screen material. |
If somebody came asking about how big of an image a G90 can make, would you tell them 300 inches diagonal? Or, would you assume they were asking about maximum size within the typical context of a reasonably watchable picture, and probably mention screen gain and lighting conditions as caveats?
I think one can safely assume that no normal person (like Jeff) would give two shits about the theoretical maximum based on lens focus when that theoretical maximum is completely and utterly useless in any normal context.
To be honest, since many lenses will focus to infinity, and few projectors (that Jeff would care about) will make an image more than a dozen or two feet in diagonal, a question about maximum image size wouldn't really have anything to do with lens focus.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Jun 07, 2014 6:43 pm Post subject: Re: How big of an image can a digital pj make ? |
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| ecrabb wrote: | | macgyver655 wrote: | | jeffslife wrote: | | How big of an image can a digital pj make ? |
As big as the lens will allow it to focus. Has nothing to do with light output or screen material. |
If somebody came asking about how big of an image a G90 can make, would you tell them 300 inches diagonal? Or, would you assume they were asking about maximum size within the typical context of a reasonably watchable picture, and probably mention screen gain and lighting conditions as caveats?
I think one can safely assume that no normal person (like Jeff) would give two shits about the theoretical maximum based on lens focus when that theoretical maximum is completely and utterly useless in any normal context.
To be honest, since many lenses will focus to infinity, and few projectors (that Jeff would care about) will make an image more than a dozen or two feet in diagonal, a question about maximum image size wouldn't really have anything to do with lens focus.
SC |
Ha, are you even reading what you are writing. Your posts are getting worse as weeks go by.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Jun 07, 2014 6:52 pm Post subject: |
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And if Jeff wants to change his question to meet your criteria I could then change my answer.
Otherwise, my answer remains.
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jeffslife
Joined: 17 Apr 2010
Posts: 4190
Location: ohio usa
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| Posted: Sat Jun 07, 2014 8:39 pm Post subject: |
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I guess what I meant was what was the largest size that still has a real good image. I should have known to be more specific. The reason I ask is I have a 1.0 gain screen that it 11 foot wide by 8 feet high. Masked off to 110 diagonal. Just thinking about the future. Thanks
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Sat Jun 07, 2014 8:43 pm Post subject: |
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| macgyver655 wrote: | | Ha, are you even reading what you are writing. Your posts are getting worse as weeks go by. |
Ha, are you even reading yours? How exactly are mine getting "worse", Mac? Do tell. Yours, while technically accurate, is as usual, confusing and even obfuscatory.
| macgyver655 wrote: | And if Jeff wants to change his question to meet your criteria I could then change my answer.
Otherwise, my answer remains. |
So does mine. I'm inferring what he's asking about, and you're taking him at literal face value. Neither of us know for certain exactly what he was getting at because of the extremely general nature of his question, so how about we wait and see exactly what he was getting at before we jump in and correct others?
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Sat Jun 07, 2014 8:45 pm Post subject: |
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| jeffslife wrote: | | I guess what I meant was what was the largest size that still has a real good image. I should have known to be more specific. The reason I ask is I have a 1.0 gain screen that it 11 foot wide by 8 feet high. Masked off to 110 diagonal. Just thinking about the future. Thanks |
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sat Jun 07, 2014 8:47 pm Post subject: Re: How big of an image can a digital pj make ? |
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| ecrabb wrote: | | macgyver655 wrote: | | jeffslife wrote: | | How big of an image can a digital pj make ? |
As big as the lens will allow it to focus. Has nothing to do with light output or screen material. |
If somebody came asking about how big of an image a G90 can make, would you tell them 300 inches diagonal?
SC |
Actually, yes. 
Lots of planetariums with 6 9" CRTs throw 40' typically. In a perfectly black room you can more or less do whatever you want. Cliff's screen is 10' wide, more than I'd ever recommend for a typical HT, but with his exceptionally black room, I'd be happy watching just one G90.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Jun 07, 2014 8:50 pm Post subject: |
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| jeffslife wrote: | | I guess what I meant was what was the largest size that still has a real good image. I should have known to be more specific. The reason I ask is I have a 1.0 gain screen that it 11 foot wide by 8 feet high. Masked off to 110 diagonal. Just thinking about the future. Thanks |
That's better but still tough to answer. I was being vague because of the large number of variables. I'll let Steve spend the time to write large posts containing all sorts of these variables. 
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Jun 07, 2014 8:56 pm Post subject: |
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| ecrabb wrote: | | macgyver655 wrote: | | Ha, are you even reading what you are writing. Your posts are getting worse as weeks go by. |
Ha, are you even reading yours? How exactly are mine getting "worse", Mac? Do tell. Yours, while technically accurate, is as usual, confusing and even obfuscatory.
| macgyver655 wrote: | And if Jeff wants to change his question to meet your criteria I could then change my answer.
Otherwise, my answer remains. |
So does mine. I'm inferring what he's asking about, and you're taking him at literal face value. Neither of us know for certain exactly what he was getting at because of the extremely general nature of his question, so how about we wait and see exactly what he was getting at before we jump in and correct others?
SC |
My answer was correct based on what he asked. There was no assumption or inferring involved. If he was wanting to ask something else then that is what should of been asking.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Jun 07, 2014 10:48 pm Post subject: Re: How big of an image can a digital pj make ? |
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| macgyver655 wrote: | | jeffslife wrote: | | How big of an image can a digital pj make ? |
As big as the lens will allow it to focus. Has nothing to do with light output or screen material. |
That was going to be my exact answer too...
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Mon Jun 09, 2014 4:17 am Post subject: Re: How big of an image can a digital pj make ? |
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| CasetheCorvetteman wrote: | | macgyver655 wrote: | | jeffslife wrote: | | How big of an image can a digital pj make ? |
As big as the lens will allow it to focus. Has nothing to do with light output or screen material. |
That was going to be my exact answer too... |
I'll ask you too then, Case… Why would anybody care about some theoretical maximum focus size enough to ask about it? At those sizes, the projector is completely and utterly worthless, so it's beyond me why you'd think anybody would be asking that question.
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HogPilot
Joined: 21 Jan 2010
Posts: 2383
TV/Projector: Vizio P702ui-B3, Pioneer Elite Pro-151FD & 111FD
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| Posted: Mon Jun 09, 2014 5:46 am Post subject: Re: How big of an image can a digital pj make ? |
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| ecrabb wrote: | | CasetheCorvetteman wrote: | | macgyver655 wrote: | | jeffslife wrote: | | How big of an image can a digital pj make ? |
As big as the lens will allow it to focus. Has nothing to do with light output or screen material. |
That was going to be my exact answer too... |
I'll ask you too then, Case… Why would anybody care about some theoretical maximum focus size enough to ask about it? At those sizes, the projector is completely and utterly worthless, so it's beyond me why you'd think anybody would be asking that question.
SC |
+1!
Other answers about the theoretical max pic size based on focus length are completely meaningless in terms of real world application. Your previous responses were spot on and in the spirit of providing meaningful, real-world answers to questions posed here.
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| ecrabb wrote: | | Curt Palme wrote: | | Interesting, Mac isn't returning my emails. Go figure. |
He's mad at us for making Hog a moderator. He took his ball and went home.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Jun 10, 2014 7:53 am Post subject: |
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Well Crabb, it doesnt matter what i think, the question, as interpreted by me, was how big can you make it, not how good will it look.
As you know i maintain a handful of digitals at work, and i have run a portable 4:3 800x600 digital on a 240" 16:9 screen to bail them out of trouble for an event. It was quite pale, i wouldnt consider it suitable, but not one single person complained. It was easily sharp enough, and with the lights out it was adequate in every way. That screen was almost the absolute focal limit for that projector. The specs say 33-300" 4:3.
So the obvious answer to such a simple question is "whatever the specs sheet says itll do". If the question was asked in a different way, like "how big can a digital go before its in over its head?" Then the answer would require the seeking of further information prior to a suitable answer.
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RUNCO DTV991 LC ( NEC XG 852 LC ) 100" 4:3 screen, H/K AVR 7.1...
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