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Room Size?

Discussion in 'Projectors, Screens & Video Processors' started by Graham Sims, Oct 7, 2001.

  1. Graham Sims

    Graham Sims
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    Hi,

    I am after either getting a rear projection tv or a Sanyo PLV30 projector, one thing is worrying me about getting a projector,is if my room is big enough to get a decent size projection, my room is 12ft in width.

    Does anyone know how big the picture would be?

    Cheers,

    Graham
     
  2. ReTrO

    ReTrO
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    The length of your room is the biggest problem. You will need this to help work out your throw length. Then you can see what size screen you can go for.
     
  3. Graham Sims

    Graham Sims
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    I am a newbie, how do I work it out, is there a formula?

    Cheers,

    Graham
     
  4. squid

    squid
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    you need the length from the screen wall to the oposit wall . take away the length of the projector and at least a few inchs for breathing room . this is your throw dist :)
     
  5. Roland @ B4

    Roland @ B4
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    Graham

    Recon to sit about 1.5 times the screen width away from your 16x9 image for a front projection screen.
    For rear projection TV's it is more but I would thought between x2 and x3 would be enough. (Of course it can be more but these are considered ideals.)

    Your projection distance will vary depending on the device you chose but allow about x2 to x2.5 the screen width to the back of the projector and you wond be far wrong.

    Go and see as many projectors as you can to get an idea as to what is suitable.

    Asuming you are shooting across you 12ft room you should be abot to achieve a 6ft or 7ft wide image.
     
  6. Chris Frost

    Chris Frost
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    Graham,
    The image size/throw distance for the PLV30 is calculated so:-

    Throw distance x 1.95 = biggest picture width
    Throw distance x 2.13 = smallest picture width

    You can also work from screen width to calculate the throw distance:-

    Screen width /1.95 = longest throw distance
    Screen width /2.13= shortest throw distance

    These figures are for guidance only. Allow an error of +/- 2% to compensate for optical errors in the lens.

    In all cases the screen width is the same for 16:9 and 4:3 images, only the height changes (gets smaller) as you go from 4:3 to 16:9.

    The throw distance is measured from lens to screen. Don't get too anul about this, the projector has a zoom lens so aim to get the machine placed in the middle of the zoom range to make life easy for yourself.

    Regards
     

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