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Does anyone have one that fits (See message)

Discussion in 'Projectors, Screens & Video Processors' started by petrolhead, Jan 3, 2004.

  1. petrolhead

    petrolhead
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    Strange title I know BUT

    It seems, from reading people comments on this forum and others, that screen manufacturers sem very poor when creating a 16:9 white area on their screen ie the PJ picture normally overlapps somewhere.

    Does anyone have a screen when the pictures fits perfectly within the white area and if so what make?
     
  2. ReTrO

    ReTrO
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    Mostly the screens are correct, and the overspill etc is down to minor inaccuracies in the projector installation.

    The American screen companies work to measurements of 1/4 inch (about 6.4mm) for screen dimensions. NOTE: These are not accuracies though, they are usualy down to about 1-3mm, which you will struggle to notice.

    :)
     
  3. PFM

    PFM
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    If your PJ has blanking facilities then you should be able to trim the picture to fit the screen.... (as long as it is geometrically correct)
     
  4. TheBigApple

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    Posted earlier but seems to have disappeared. :confused:

    I've only got a Draper Luma 92", which I believe is a relatively cheap screen. There is no overlap, although I think the projectors adjustments help to get it just right i.e. horizontal and vertical lens shift.
     
  5. petrolhead

    petrolhead
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    You are lucky Monkeyboy.

    My first screen was a Luma 92 and the picture overlapped by 2cm on the RH side.

    You also have lense shift which must help
     
  6. TT9

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    I know Pete has been having some issues with his picture geometry, and I am not suggesting for a second that his installation is less than perfect, but I think there is a lot in what Retro has to say.

    I found that I had to place my Sim2 absolute dead centre of the screen otherwise if I compensated with even a small left/right angle adjustment I would get a trapezoid effect and get overspill in one or two corners and an image that was not exactly parallel along the horizontals. The vertical, I was able to compensate with lense adjustment.

    Saying all this, I do have a gap of approx 1 inch at the top of the screen which gets me wondering if my screen is exactly 16:9. . . .
    :eek:

    Steve.
     
  7. petrolhead

    petrolhead
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    Point taken Steve and maybe I should do some measuring with the image on the wall 2" behind the screen to check to see its actually 16:9
     
  8. Gary Lightfoot

    Gary Lightfoot
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    I found that just a small amount of innacuracy with placing the pj dead center can cause odd image geometry problems. A slight amount of twist either way would leave the top of the image square with the screen, but the bottom would go down slightly in one corner.

    I also found the screen was flat to the wall, but the wall wasn't flat, so I had to make a couple of minor adjustments, and then everything became square.

    Add to the fact that not all films are pure 1.85.1 or 1.78 to one doesn't help. :)

    Gary.
     
  9. Godfather

    Godfather
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    Mine fits fairly well, may be max 5mm of overspill towards the bottom right corner, most likely because the alignment is not 100% dead centre. Most of the cinemas I've been to have so much over-spill that I think being able to minimise this at home is a real luxury!
     

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