Q. Ok, I've been asking questions on here all week, and not too long ago i chose the epson 705hd but now ive decided i will spend enough to get the higher end powerlite home cinema 8350 model. I had everything planned out, i knew the screen size i needed, i knew how far back it needed to be, i knew how dark the room needed to be and pretty much everything else, i was 100% sure i would get the 705hd but now i have to start over. I was using projector centrals projector calculator to see how far back my epson powerlite home cinema 8350 would have to be to get a 111 inch diagnal screen size and it said i need to be 14' 10' feet back and that is '10 too much unfortunately (i know, it's not a huge room, but i do plan to add a home theater room when i get some "fun" money) , it says this distance is for 1.55 zoom. I was wondering if i increased the zoom enough, would there be any negative side effects? I guess i just don't understand how zoom works but will the picture quality be same no matter how much or how little i use zoom? And also, this projector has a brightness of 2000 lumens and a contrast ratio of 50,000:1, i was wondering what kind of screen i should get for the deepest blacks and richest colors? For the most part i'll be using the projector in eco mode which is somewhere around 500-800 lumens. With that said, what kind of screen would you guys recommend? Also, no DIY answers please, i can't do that in its current location or i couldn't open the door that's behind it, unless someone can point me to a guide that will allow me to make a screen that retracts as well (I have such an odd house...). So much to do... it's making my head spin...
Listen, i just wan't to know if zoom effects the quality at all, that's all i want to know.
Answer
The zoom lens will not have a negative influence on the image quality as long as you avoid using the zoom lens at either end of its maximum range. That said youâre clearly on the correct path. Keep working with your projection calculator of choice to refine and optimize your projection system â itâs an iterative process. Selecting the optimum combination of projector settings, lens adjustment, projector mounting location, screen material, and screen sizeâall which is influenced by the viewing environment and viewing conditionsâis a very fine balancing act.
My position when it comes to home theater projectors fitted with zoom lenses is as follows: avoid any projector arrangement that forces you to set the zoom lens within roughly 10% of either extreme of the zoom lens range. For example, pushing a lens to the shorter- or wider-angle-end of its throw range generally increases the potential for âvignetting,â which is a term commonly used to indicate a noticeable non-uniformity of illumination that is concentric in nature. Here is a quote from Projector Centralâs Epson PowerLite Home Cinema 8350 Projector review: âtelephoto does have the advantage of focusing the light coming from the projector into a tighter cone, which will result in more even screen illumination.â I believe the best compromise is to select the remaining factors such that you end up with the zoom lens set at or near the middle of its zoom range. Much of this will greatly depend on interdependent factors such as real world screen illuminance, screen size (and peak screen gain and type of screen,) viewing distance, and projector mounting distance. And you need not worry about (zoom) lens performance â Fujinon is well known and has a very good reputation.
The choice of screen sizeâand more importantly screen materialâwill depend on the maximum size of the audience that will be viewing the screen, the seating layout, and the projectorâs light output, which is directly influenced by the projector settings and throw, and the amount of ambient light that may be present under viewing conditions.
To avoid any potential for noticeable âhot-spotting,â while at the same time providing for an acceptable half-gain viewing angle, you should avoid any screen material with a peak screen gain greater than 1.3 to 1.4 roughly. I highly recommend a black-backed diffusion screen material from any one of the reputable, well-known screen manufacturers, of which there are many choices. A fixed-frame projection screen would maximize simplicity and help control the screen cost however a retractable screen shouldnât pose a problem as long as it is a tensioned screen. The screen formatâor aspect ratioâshould be no less than 16:9 or 1.78:1. Also, itâs important that your screen border is fitted with a black velour or velvet screen frame finish or masking (i.e. border) to absorb overspill. This helps to noticeably increase perceived contrast. Please keep in mind that, while I wholeheartedly support your decision to use âeco-modeâ as the primary operating mode of your projector, however the Epson PowerLite Home Cinema 8350 Projector has a real-world light output of no more than roughly 360 lumens or so when configured for optimal performance in a dark room, i.e. Color Mode is set to Cinema and Power Consumption is set to ECO. As you might expect this ultimately forces you to use a smaller projection screen IF you value reasonable screen brightness.
Taking into account the projector light output when configured for optimal picture quality, lamp longevity, minimal cooling fan noise, and a reasonable zoom lens setting, I recommend a screen size no larger than 92 inches for a screen with a peak gain of 1.1. If you allow yourself to compromise on certain projector settings, and possibly use a higher gain screen material in the neighborhood of 1.3, you would likely be able get away with using a larger screen â perhaps 100 to 106 inchesâ¦but at the expense of picture quality and/or shorter lamp life. Itâs worth noting that you also have the option of purchasing a bit larger screen than an optimized Epson PowerLite Home Cinema 8350 Projector can handle by simply masking the screen down to a more manageable image size. This allows you to use the same screen in the future (with less masking) whenever you choose to upgrade to a new, potentially higher light output projector.
For your convenience I have included an extensive set of resources, particularly the first Google Docs page listed below, to help quickly narrow-down your choices of screens and screen materials.
######################## RESOURCES ########################
âPlanning and Setting Up a Front-Projection Home Theaterâ
http://www.isftv.com/Article_Planning_and_Setting_Up.html
Projector Reviews
â General Projector Advice and Information
http://www.projectorreviews.com/adviceinfo.php
â The 1080p Home Theater Projector Comparison Report
http://www.projectorreviews.com/1080p-projector/index.php
â Home Theater Projector Brightness, Zoom lenses and Throw Distances
http://www.projectorreviews.com/advice/HomeTheaterProjector-FAQs/ProjectorsLensThrow.php
Recommended Equipment for an Entry-Level Front-Projection System Home Theater
http://docs.google.com/View?id=dhpmqnbb_30frrhb6hh
Epson PowerLite Home Cinema 8350 Projector
http://www.epson.com/cgi-bin/Store/jsp/Product.do?sku=V11H373120
Epson Home Cinema 8350 Home Theater Projector Review
http://www.projectorreviews.com/epson/home-cinema-8350/
Epson PowerLite Home Cinema 8350 Review
http://www.projectorcentral.com/epson_home_cinema_8350_projector_review.htm
Buyerâs Guide for Business & Home Theater Projectors
http://www.projectorcentral.com/buyers_guide.cfm
Practical Home Theater Guide
â Home Theater Screens â The Secret Behind Great Image Projections
http://www.practical-home-theater-guide.com/Home-theater-screens.html
â Screen Size versus Optimum Viewing Distance
http://www.practical-home-theater-guide.com/Tv-viewing-distance.html
AccuCal Projector Screen Reviews: Screen Material Report
http://www.accucalhd.com/reviews.htm
Yahoo! Answers
â Best Home Theater Setup: (Best Projector, Screen, and Sound System)?
http://answers.yahoo.com/question/index?qid=20100620094518AA9Cfqh
â Which are the characteristics to look for when buying a home video PROJECTOR?
http://answers.yahoo.com/question/index?qid=20090701082858AAes5ii
â Why do all the high end Home Theatre Projecters [sic] have less lumens than the cheap ones?
http://answers.yahoo.com/question/index?qid=20090526103558AAQ4FNM
â What front projector screen size?
http://answers.yahoo.com/question/index?qid=20090305132143AAFsL2j
â How do I choose a home theater screen?
http://answers.yahoo.com/question/index?qid=20081214185050AAQcp0v
â What is best screen for Optoma HD80?
http://answers.yahoo.com/question/index?qid=20090226095949AATpahf
Entertainment Technology Consultants
â [PDF] Cowan, M. âImage Quality for Home Theatreâ
http://www.etconsult.com/papers/Image%20Quality%20for%20Home%20Theatre%20Matt%20Cowan.pdf
Audio-Video & Home Theater Resources
http://docs.google.com/View?docid=dhpmqnbb_19t3j6xkgs
âScreen Size vs. Viewing Distance vs. Resolutionâ
http://www.carltonbale.com/2006/11/1080p-does-matter/
Schneider Optics
â White Papers
http://www.schneideroptics.com/info/whitepapers/whitepapers.htm
â Literature for Home Cinema (see âQuality Criteria of Lensesâ)
https://www.schneideroptics.com/info/homecinema.htm
KODAK Cinema and Television: Film Notes for the Reel People
â [PDF] Publication # H-50-29
http://www.film-tech.com/warehouse/manuals/H5029.pdf
â [PDF] Publication # H-50-30
http://www.film-tech.com/warehouse/manuals/H5030.pdf
â [PDF] Motion Picture Education: Resources
http://webperf.kodak.com/US/en/motion/education/informationA.jhtml
Wikipedia
â Vignetting
http://en.wikipedia.org/wiki/Vignetting
â Lens (optics)
http://en.wikipedia.org/wiki/Lens_(optics)
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does a painted flat white wall can beat the real screen on projected image?
Lou
I have a 92" DIY projector screen, painted on flat white latex. I am planning to upgrade this screen to a real one. Does a painted flat white wall can beat the real projector screen, with regards to the quality image?
Answer
Just regular paint is inferior to a Projection Screen. But ... I have heard that you can buy special paint with light reflecting particals that approaches (or is equal to) the quality of a true screen. Check out the links below.
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