Viewing distance - yes another thread

Discussion in 'LCD & LED LCD TVs Forum' started by n00b, Sep 1, 2007.

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  1. n00b

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    Hi all,

    I'm getting an lcd tv and will be sitting about 2.2m away. Now at first I was thinking a 32" set would be perfect (about an 18 degree viewing angle), but now I'm not so sure and am seriously considering going for 40" (23 degree viewing angle).
    Is 23 degrees too much? I have read that the max recommended is 15-20.
    Am I going to regret going for 40"? Ie. is 2.2m too close for 40"?

    Thanks for any replies, just want to confirm before i set it all up and then think "damn i should have got the 40".
     
  2. ChrisGgr

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    Its a little close for a 40"!!Its better to take a 32",but I keep an open window for a 37".Maybe the 37" is good.
     
  3. craigd

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    It is very close for a 40" - DVD may be OK and HD fine but SDTV willlook awful. I sit ~3m from a 42" and digital SDTV (apart from BBC) is pretty bad but I am not too bothered cos I bought it for watching DVDs.
     
  4. TRON1

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    Depends what your watching,HD matriel will be good whatever the screen size,but if its just for SD id stick to 32" for viewing distance.
     
  5. n00b

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    sd stuff, xbox 360 and hd movies too.
     
  6. badbob

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    I'm 2M from a 40", looks great. Don't watch freeview TV though. If you get a 32" you'll regret it when watching 2:35 films.
     
  7. jason g

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    ive got the same dilemma, i want an lcd tv for my bedroom and will be about 9-10ft away from it, i dont know whether to get a 32 inch tv or 37 inch tv.

    looked at the toshiba 32 inch 3030c version, but the 37 inch version didnt look much bigger.
    also saw the 'X' version of the tosh 37 inch available for £799.
    so dont know whether to go for full hd and then rebuy dvds for it or keep the standard ones i have and just buy a 32 inch tosh.

    any thoughts?
     
  8. badbob

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    Scaling DVD-Video's look much better on a 1080p than you would think, as long as high bitrate.

    I wouldn't rebuy films you've got already, or if you do only for your very favourite films.
     
  9. n00b

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    Its ok I don't intend to watch freeview. I just read another forum and they are of the opinion you are, there are guys on there who watch 50" screens from 2.5m! So looks like its not that huge an issue afterall.
     
  10. emu

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    hi i think all this crap about viewing distances is balonely :rotfl:

    ok heres what i did

    32 inch hitachi hooked up to - xbox 360,wii,ps3,upscaling samsung dvd player,htpc,dvd recorder

    37 inch samsung r78 hooked up to -xbox 360,wii,ps3,upscaling samsung dvd player,htpc,dvd recorder

    40 inch samsung r88 hooked up to -
    xbox 360,wii,ps3,upscaling samsung dvd player,htpc,dvd recorder

    40 inch samsung lem hooked up to -xbox 360,wii,ps3,upscaling samsung dvd player,htpc,dvd recorder

    i sit a couple of feet away from the tv and it has to have a good viewing angle

    my 40 lem actually is giving me a better picture than the hitachi i had
     
  11. emu

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    oops forgot to say i dont watch freeview but sky plus on a good scart cable looks superb :thumbsup:
     
  12. badbob

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    You need to sit at least 150' away from a 7" portable TV. :rotfl:
     
  13. emu

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    oh badbob according to the graphs its 149 away from a 6" screen
     
  14. hollyjoint

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    46 full hd for 4 meters is good?
     
  15. n00b

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    If by full hd you mean 1080p then you are way too far.
     
  16. zAndy1

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    I'm sat approx 8ft from my 42" and to be honest I think it's a bit close, with SD material at least. Thinking maybe a 37" screen would have been better
     
  17. nwgarratt

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    Is that including the 42? How can you focus your eyes or stop your head from moving sideways? Also, expect your eyesight to suffer.

    I am very happy with 32" at 9 feet.
     
  18. Icm76

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    Calculator here: (I used 2.2m = 7.2')
    http://www.myhometheater.homestead.com/viewingdistancecalculator.html
    THX recommendations suggest that you would be sitting twice as far back as their recommended optimum for your 32" screen size!

    THX site home theatre tips:
    http://www.thx.com/home/setup/display.html
    THX cinema certification guidelines:
    http://www.thx.com/cinema/builtTHX/screen.html

    Note that there is no talk of resolution here.

    My 2 cents opinion:
    A lot of rubbish gets talked about viewing angles & optimum screen size. You should go with whatever you feel comfortable using. These THX (or others) recommendations are just that, recommendations. They only become rules if you want your cinema certified to a standard. What is the view angle in an IMAX theatre? What about IMAX dome where the screen wraps around? Would it meet THX standards?

    You need to be able to see clearly, whilst sitting far enough back to not be overwhelmed. You may also want to sit far enough back to eliminate any resolution related jaggies, scaling or deintelacing artifacts, screen door effects etc that you find annoying.

    My PC doesn't have image artifacts that I need worry about, and 21" 4:3 is fine at <=0.6m & >44&#176; view angle. Using the same viewing arc the screen could be 42" (4:3) at <=1.2m. Not sure I'd want that though...


    Where do you get that from? Got any links to opticians advice or anything like that? Seriously - I am looking at large screens for PC gaming & I'd like to look into that more. I would've thought the opposite is true - sitting to far may give you eye strain...
     
  19. hollyjoint

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    which is in the distance ideal for one 46 " full hd?
     
  20. n00b

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    Yep this is one of the caculators i used too. THX says maximum viewing distance for 32" is 5ft, thats less not more :p Recommended is to view from 3.6ft.

    Perhaps this will help. At full 1080p you don't want to be further than 6 or 7 feet from the screen. Although I doubt you'll be watching full hd all the time.

    I think a lot of this has to do with the technology used. For example I can never see the pixel structure on a dlp from a few inches away whereas other technologies such as plasma show the pixel structure from the same distance.
     
  21. robfosters

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    That calculator is crazy!

    It's telling me that from 8 foot, the ideal screen size for viewing THX stuff is 72inch. That's 6 foot :eek:
     
  22. n00b

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    Does your head move sideways when sitting in the middle or back rows of a cinema? That viewing angle is far greater than anything you have at home. In fact I'd say its easier on the eyes since you don't have to strain them to see small detail.
     
  23. n00b

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    Yeah, THX distance calculation is based on high quality video. Take the cinema viewing angle example.
     
  24. robfosters

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    But you can't get much more high quality than a 1080p blu-ray. That's what I am using, so if I want to get the full benefit, i'm gonna have to remortgage the house for a new box :D
     
  25. n00b

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    Or just sit closer?
     
  26. nwgarratt

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    If you sit in the first row then yes. You can't compare the cinema and most people will sit a lot further away than the equivalent at home. I get a bigger picture at home than I would at the cinema when looking at the size of the picture and the distance I sit back. In fact, the cinema screen looked too small for me when compared to the perspective I get at home. That is the problem. Everything is bigger.

    Eyesight will suffer especially when for long periods and sitting to close in the dark. My Friend has gone from 20/20 vision to worse eyesight than I have in less than a year (and have bad eyesight all my life). Both the opticians and Doctor say it is because it is how he watches TV's and play games on it. He had a 37" and sat around 4 feet away.

    Is it really worth risking eyesight over a TV? Sit further back and enjoy it. There is no way to strain eyes from sitting back even with a 14" TV. The picture is just very small. Extra detail won't be seen.
     
  27. Icm76

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    Have I missed something here? You said you were proposing to sit 7.2ft from a 32" screen? That's more than the 5ft recommended maximum?

    I don't think this matters - think we all know what we're getting at :)

    Interesting - plenty of multi monitor set ups on peoples desktops these days, and 30" monitors (much higher res). I wonder if the pixel pitch (space between pixels) & pixel density are particularly critical or if it's using it in the darkness that is the key issue?

    Your friends 37" TV at 4ft is almost bang on the THX 36&#176; optimum? Actually 37.1&#176; according to the calculator, but still below the 40&#176; max the THX home cinema setup guide suggests. Is it a TV with 1920x1080 or 1366x768?
     
  28. nwgarratt

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    Multi monitors are fine as long as the person isn't too close. I wouldn't have them on a desk with me a couple of feet away and have huge monitors. If it is situation where the person is standing up or the monitors are further back then it is different (thinking CSI, 24 type of TV shows).

    Can't remember the TV but it would have been 768.

    I have a projector (one of the reasons I don't need a big TV) at 80" widescreen. I watch it at the same distance as the TV. Oner reason why it is different to a TV is that TV's are a lot brighter (and more contrast). You get a lot of glare from the TV in the dark and way more than I get with a projector and this is being stared at all the time when watching. I would make sure there are some ambient light source in the room behind or next to the TV.

    I can't watch or use my 32" up close like 2 feet away. I can't focus my eyes or make sense what is going on. The minimum distance I watch it is 4 feet away and that is just watching over my shoulder at my computer desk.
     
  29. n00b

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    Unless you are sitting less than 2-2.5m from a 50" screen you are not getting a cinema experience. You need to aim for 30+ degrees.
    edit: not to worry, just read about your 80" projector screen.

    Sorry to hear that, but on the flip side there are people who don't develop vision problems. I remember playing my xbox360 on a 56" screen from less than 2.5m back when it first came out (but that was on a dlp and I didn't watch tv on it or films etc from that distance). My eyes did not have to scan and I found it quite comfortable to play. I know a few people who game on large screen displays. I suppose its one of those things we won't know for 20 yrs when most of the teens now are walking around with thick specs on :)

    Ah apologies, I misread, I thought you said I needed to move further back. Yeah I just repeated what you said, oops heh heh.
     
  30. Icm76

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    This does make a lot of sense. Later I'll see if I can find the Heath And Safety Executive advice for office workspace & computer workstation set up.

    Certainly office monitors are equipped with some very aggresive anti-glare filters and I remember something in Health & Safety about managing ambient lighting.

    It's certainly a strong recommendation (if not a binding requirement) that computer workstations/VDU operator stations are not set up with the monitor up against a wall - unless it's in front of a window. Desks should be faced into the room with the operators back to the wall.

    This is so that when you take your eyes of the screen you are able to focus on objects much further away - it keeps the eye muscles active & healthy to keep changing the focus distance. You're also recommended to keep getting up, moving about every hr - getting a cup of water or something like that.

    If you don't do this then vision can worsen, you'll suffer headaches & dizziness etc. All the bad symtoms VDU & office workers get.



    Of course none of these points about ambient light/glare/variable focus distance take into account the viewing arc or image quality - either as a result of processing artifacts/low res/low pixel pitch etc.
     

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