1. Join Now

    AVForums.com uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

what size?

Discussion in 'Projectors, Screens & Video Processors' started by marcoeser, Apr 8, 2004.

  1. marcoeser

    marcoeser
    Standard Member

    Joined:
    Jul 17, 2000
    Messages:
    340
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    21
    Ratings:
    +1
    just a quick question, what size of screen (16:9) would you install if you were sitting 4.5m away? I'm between 3 & 2. 5m widths. What's you suggetions?
    Thanks, marc
     
  2. MATT JENNER

    MATT JENNER
    Active Member

    Joined:
    Dec 3, 2000
    Messages:
    374
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    21
    Location:
    Gravesend/Kent
    Ratings:
    +8
    4.5 metres is approx 14 feet,

    what is the distance betwen the front of the lens of the projector to where your screen is going to be ?

    just measure that distance and divide by 1.5

    i have an 8 ft dual masked screen and it is 12 feet from lens to centre of screen, so you have more than enough space for an 8 ft screen.
    I have based this calculation on the assumption you have a crt,
     
  3. Gary Lightfoot

    Gary Lightfoot
    Distinguished Member

    Joined:
    Apr 6, 2001
    Messages:
    12,431
    Products Owned:
    1
    Products Wanted:
    1
    Trophy Points:
    166
    Location:
    Surrey. UK.
    Ratings:
    +2,092
    If you have digital, then sitting two times screen width away may be more prudent, depending on resolution.

    If it's an xga or higher res digital, then 1.85 should be OK. Any closer and you may see screendoor (the gaps between pixels). This is more evident with LCD than DLP.

    I belive the SMPT recommendation is around two times screen width and 30 degree viewing angle. THX has a similar spec IIRC.

    Gary.
     
  4. marcoeser

    marcoeser
    Standard Member

    Joined:
    Jul 17, 2000
    Messages:
    340
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    21
    Ratings:
    +1
    Thanks for your replies, but I wasn't really asking about the projector restrictions of size, i was more interested if you were sitting 4.5m (14.7 ft) away how large would you like the screen. Another way of asking it is whats your prefered angle of view?

    At the cinema some people like sitting right at the front and others all the way at the back and most somewhere in the middle.

    Gary, whats SMPT ?


    marc:hiya:
     
  5. Gary Lightfoot

    Gary Lightfoot
    Distinguished Member

    Joined:
    Apr 6, 2001
    Messages:
    12,431
    Products Owned:
    1
    Products Wanted:
    1
    Trophy Points:
    166
    Location:
    Surrey. UK.
    Ratings:
    +2,092
    Sorry, that should have read 'SMPTE' which is The Standard of Motion Picture and Television Engineers.

    At the cinema, I sit in the middle, at home, I sit at about 1.85 (12.5ft) screen width (7ft) from my screen.

    HTH (Hope That Helps). :)

    Gary.
     
  6. avanzato

    avanzato
    Active Member

    Joined:
    Jan 21, 2003
    Messages:
    1,881
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    51
    Location:
    Norfolk
    Ratings:
    +61
    The minimum angle of view for a THX cinema is 26 degrees for the farthest seat with 36 degrees recommended. I just worked my angle out at 31 degrees which I feel is too narrow, the screen seems distant and not immersive enough. The problem is if I sit too close I get the screendoor effect of the PJ.

    You also want the bottom of the screen to be below eye height if possible it makes a huge difference IMO.
     
  7. Gary Lightfoot

    Gary Lightfoot
    Distinguished Member

    Joined:
    Apr 6, 2001
    Messages:
    12,431
    Products Owned:
    1
    Products Wanted:
    1
    Trophy Points:
    166
    Location:
    Surrey. UK.
    Ratings:
    +2,092
    Good point Mat,

    I find that having to look up at a screen too much makes me feel uncomfortable. I sit with my eyes about a third up from the bottom of the screen, and that feels very comfortable. I may consider lowering the screen a little to improve this further, but my subs and center sit under the screen so I could only do this by a few inches at most.

    Here's a link that might be useful regarding distances and viewing angles for those who might be interested:

    http://www.myhometheater.homestead.com/viewingdistancecalculator.html

    Gary.
     
  8. dr no

    dr no
    Moderator

    Joined:
    Mar 30, 2004
    Messages:
    8,756
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    166
    Ratings:
    +3,592
    I have just joined the projector scene.

    I sit 12 feet from an 8 feet screen. It is barely enough. A few couple more feet would have been better but not everyone is fortunate enough to have a choice.

    But re: angle - I find the best position is to be somewhere quite close to the midscreen height from sitting position.

    It is SOOOOO much more comfortable.

    Looking up I find is quite difficult for long periods of time.

    In Cinemas I aslo sit in the middle. Anywhere else I find uncomfortable.
     

Share This Page

Loading...