Tinsanta Posted February 25, 2007 Posted February 25, 2007 Hi All, Another question on My home theatre quest. I am looking at getting a 120" screen but I was just wondering how far back you have to be from a screen that big to enjoy the picture. I will have a Epson tw 700 working the screen. Any comments would be greatly appreciated. I am also going to get the Jamo A120 as the speakers for this beast, and a Yamaha 359 av receiver. I also will have a custom built media centre Pc.... Sorry to bable but I am quite excited. So My question I pose to you all, What is the recommended viewing distance from the screen?
50mxe20 Posted February 25, 2007 Posted February 25, 2007 There have been a lot of threads here talking about this. Just do a search on distance - topics only. In the meantime, here is a place to start. Pinned: Viewing Distance Calculation Results and http://www.myhometheater.homestead.com/vie...ancemetric.html
50mxe20 Posted February 25, 2007 Posted February 25, 2007 Thanks! No worries. I'm actually re-reading that thread at the moment. Some very good stuff in there.
norpus Posted February 26, 2007 Posted February 26, 2007 Here is a pretty technical thread on avs, showing what is important regarding resolution of the human eye vs resolution of pj and sitting distance. http://www.avsforum.com/avs-vb/showthread....age=1&pp=30 Note that resolution is not the be and end all - its probably 4th on the list. But the latest 1080p pjs like the HD1 have these other attributes covered better than others as well This chart probably simplifies it best http://www.carltonbale.com/wp-content/uplo...ution_chart.png Tinsanta, as a direct response to your question with a 720p projector and 120" screen, the answer is 42 23 feet (7metres) when 720p is fully resolved ie your eyes resolving powers are no better the further back you go (kinda like pixel mapping for your 20/20 vision?? ) For a 1080p source/pj later down the track, this would be 16ft (5mtrs) for your screen (or closer as you really can't see SDE/pixels anyway on these)
50mxe20 Posted February 26, 2007 Posted February 26, 2007 Tinsanta, as a direct response to your question with a 720p projector and 120" screen, the answer is 42 23 feet (7metres) when 720p is fully resolved ie your eyes resolving powers are no better the further back you go (kinda like pixel mapping for your 20/20 vision?? ) Would it be fair to say that unless you are in a very large room (7 metres) that maybe a 120 inch screen is a bit large?
Tinsanta Posted February 26, 2007 Author Posted February 26, 2007 Would it be fair to say that unless you are in a very large room (7 metres) that maybe a 120 inch screen is a bit large? Yeah I have a about 4-5m viewing distance so I am leaning for to big. Although I will see what happens and let you guys know. Thanks for your assistance.
50mxe20 Posted February 26, 2007 Posted February 26, 2007 Yeah I have a about 4-5m viewing distance so I am leaning for to big. Although I will see what happens and let you guys know. Thanks for your assistance. Well it should be a very emmersive experience. With that PJ and room size though I'd be tempted to go a bit smaller. However, that is just my opinion on very limited PJ experience. I would welcome a comment from the many PJ experts here (like norpus, or foggy, or benthx, or ??).
norpus Posted February 26, 2007 Posted February 26, 2007 Well it should be a very emmersive experience. With that PJ and room size though I'd be tempted to go a bit smaller. However, that is just my opinion on very limited PJ experience. I would welcome a comment from the many PJ experts here (like norpus, or foggy, or benthx, or ??). Yes that 120" is a big screen. From 4.5mtrs, that is OK (about 33degrees) I have often commented my 108" screen is actually too big for my room/viewing distance. I view from only 3.5mtrs, so that is a very wide angle of just under 36degrees which is THX spec. It takes a few screens/projectors/years to get over the bigger is better. As you can tell, I have still not learned My aim tho is to get a scope screen of about the same width and smaller height, and then do the CIH thing which will give me 25% more punch, an immersive image without looking too big on 16:9. It will still be 36 degrees but an easier screen to view in scope
flukeyluke Posted February 26, 2007 Posted February 26, 2007 Yes that 120" is a big screen. From 4.5mtrs, that is OK (about 33degrees)I have often commented my 108" screen is actually too big for my room/viewing distance. I view from only 3.5mtrs, so that is a very wide angle of just under 36degrees which is THX spec. It takes a few screens/projectors/years to get over the bigger is better. As you can tell, I have still not learned My aim tho is to get a scope screen of about the same width and smaller height, and then do the CIH thing which will give me 25% more punch, an immersive image without looking too big on 16:9. It will still be 36 degrees but an easier screen to view in scope Dont you find your eyes need to track around the screen. I will be viewing from 4.5metres and will probably just go a 95"
norpus Posted February 26, 2007 Posted February 26, 2007 Dont you find your eyes need to track around the screen. Not on scope movies but yes on the tennis (there I try to stay focussed on one young thing at a time, and turn the sound off)
CAVX Posted February 26, 2007 Posted February 26, 2007 Not on scope movies but yes on the tennis (there I try to stay focussed on one young thing at a time, and turn the sound off) If you work on 3.68 times the image height, you'll never have "tracking issues" regardless of image size or aspect ratio... Mark
flukeyluke Posted February 27, 2007 Posted February 27, 2007 If you work on 3.68 times the image height, you'll never have "tracking issues" regardless of image size or aspect ratio...Mark Just to clarify the 3.68 bit, I read that to mean you should be seated 3.68 x the screen height - eg: screen height = 1.5m, you should be 5.52m from the screen. Correct?
CAVX Posted February 27, 2007 Posted February 27, 2007 Just to clarify the 3.68 bit, I read that to mean you should be seated 3.68 x the screen height - eg: screen height = 1.5m, you should be 5.52m from the screen.Correct? Correct Mark
Guest EZYHD Posted February 27, 2007 Posted February 27, 2007 I lined up my Epson TW600 lens smack in the middle of my 100" 16.9 screen, the lens is half way of recommended lens throw, about 3.6m, the picture is beautiful.
AndrewW Posted February 27, 2007 Posted February 27, 2007 Dont you find your eyes need to track around the screen. I will be viewing from 4.5metres and will probably just go a 95" I have a 96" screen, my front row of seats is 3.5m and the back row is 4.5m from the screen. Front row feels a little close (I'm happier when reclined to get away from the screen a bit), the back row is perfect. So your screen size and distance sounds great (based on my personal experience). Andrew.
50mxe20 Posted February 27, 2007 Posted February 27, 2007 If you work on 3.68 times the image height, you'll never have "tracking issues" regardless of image size or aspect ratio... Can this ratio be applied to a plasma display and be meaningful or is that a completely different kettle of fish? Slightly OT but relevant.
flukeyluke Posted February 27, 2007 Posted February 27, 2007 I have a 96" screen, my front row of seats is 3.5m and the back row is 4.5m from the screen.Front row feels a little close (I'm happier when reclined to get away from the screen a bit), the back row is perfect. So your screen size and distance sounds great (based on my personal experience). Andrew. Yeah, I reckon I am on the money too.
Tinsanta Posted February 27, 2007 Author Posted February 27, 2007 Yeah, I reckon I am on the money too. So Basicly people think I will be ok at 4.5m on a 120" screen, well 110" widescreen format.
norpus Posted February 27, 2007 Posted February 27, 2007 So Basicly people think I will be ok at 4.5m on a 120" screen, well 110" widescreen format. One thing you may notice Tinsanta is if the source is not perfect, moreso the bigger the screen 1. HD as in 1080i and scope you won't have a problem with 2. Good SDTV and good DVD transfers also OK through a good player 3. What you may have probs with with a big screen is the poorer sources - like older tv programs and some foxtel channels. They can become fuzzy and hard to watch on a pj, let alone a big pj screen. But you know all that I'm sure. I partially solved this by buying a crash hot SD scaler (VP30) and it did help a lot, but still not perfect for big screen naturally
Guest EZYHD Posted February 27, 2007 Posted February 27, 2007 We sit about 4.3m back from a 100" screen, think its perfect, don't really need a bigger screen IMO.
Tinsanta Posted February 27, 2007 Author Posted February 27, 2007 Foxtail, you will be proud to know I got my epson tw700 ($2080). It is all slowly coming together. Next the receiver (Yamaha 359) and speakers (Jamo A102) and the the HTPC. I cant wait.
Guest EZYHD Posted February 27, 2007 Posted February 27, 2007 Foxtail, you will be proud to know I got my epson tw700 ($2080). It is all slowly coming together. Next the receiver (Yamaha 359) and speakers (Jamo A102) and the the HTPC. I cant wait. Good on you, I think the Epson TW series are an excellent buy for the bread, your price was unreal to say the least.
Tinsanta Posted February 27, 2007 Author Posted February 27, 2007 Good on you, I think the Epson TW series are an excellent buy for the bread, your price was unreal to say the least. I know, I just bought it today, I called the business and they said what price did you hear and I said 2080 and got it. They have to order it but I have put a deposit on and should be here by the weekend.
Guest EZYHD Posted February 27, 2007 Posted February 27, 2007 I know, I just bought it today, I called the business and they said what price did you hear and I said 2080 and got it. They have to order it but I have put a deposit on and should be here by the weekend. Looks like your weekend is going to be exciting, I know mine is birfdee coming up and a huge party to boot, plus I'll be getting a red telly.
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