help needed in set up of HC4000

Discussion in 'Displays' started by rajung, Mar 7, 2011.

  1. rajung

    rajung Auditioning

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    Well I recieved my Mitsubishi HC4000 today and began takeing down my Optoma and setting up the new one today.The ceiling mount set up wont work so I am going to mount on a shelf on the wall.The manual says to set the lens at center of screen.I still have my 4:3 screen set up until the new 16:9 shows up.I temporarily set it up at 30 inches from the center of lens up from the floor.Since I dont have it all set up the way I want currently the projector is 12 ft from screen to front of lens and.Strange thing is that I am playing The Batman Dark knight and Proj. set at 16:9 ration and while playing the movie the projected screen image changes.Most of the time it plays at 28 inches tall by 69 in wide and also goes to 34 x 69 and 39 x69

    I know its only a 12ft throw but this seems a little silly.The projector Calculator on the net shows at that range of throw it should be around 49 h x 100 Diag. x 87W

    Thanks for any advice
     
  2. rajung

    rajung Auditioning

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    Well I just found a zoom!

    Hope thats it

    Man, I shouldnt admit that

    Hope thats it

    But will screen sizes change in height while playing movie?
     
  3. Jim Mcc

    Jim Mcc Producer

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    No, screen size should not change size.
     
  4. rajung

    rajung Auditioning

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    I restarted the movie and at the exact same spots the size changes,really makeing it tough to decide where to set the Pj as far as distance from floor
     
  5. GeorgeAB

    GeorgeAB Second Unit

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    Some scenes in 'The Dark Knight' were shot with IMAX cameras. Those scenes are formatted in a 16 x 9 aspect ratio (1.78:1) on the disc. The rest of the movie was shot with 35 mm film and formatted for 2.40:1 anamorphic aspect ratio. This was an artistic decision presented with dual formats in the IMAX theaters. The same methodology was carried through for the optical disc release. It drives people nuts who use an anamorphic lens or zoom method for a constant image height, Cinemascope screen.


    There may be a test pattern for screen alignment in the menu of your projector. If not, use a similar test pattern from a home theater setup disc, such as 'Digital Video Essentials: HD Basics.' You can also just use a standard HDTV channel on your video programming service, or use an optical disc program formatted for 16 x 9 screens.


    Best regards and beautiful pictures,

    G. Alan Brown, President

    CinemaQuest, Inc.

    A Lion AV Consultants Affiliate


    "Advancing the art and science of electronic imaging"
     
  6. rajung

    rajung Auditioning

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    ,

    wow, thanks for that infoway more than I would have thought to be the issue!
     
  7. GeorgeAB

    GeorgeAB Second Unit

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    Only one small example among a gazillion why being able to hire an experienced professional can help avoid problems in designing and installing a home entertainment system. Hobbyist forums typically only offer guidance for isolated problems when they happen to be recognized as such. Many consumers have problems of equipment performance they never identify, and just live with the diminished value as a result. Ignorance is not bliss in such cases.
     
  8. rajung

    rajung Auditioning

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    thanks again for the info,I tried another one and still set up at a throwing distance of 12ft.As a note the screen didnt change on this one.Just a question though.The prjected image is at 40" heightwith zoom all the way out, going by the projector calculator @it should be showing a image of 49 inches, if I run the distance down on the calc.to the image that I get it shows a throw distance of9.5 ft.Is this just a rough est. of what it should and be that far off,thanks
     
  9. Jason Charlton

    Jason Charlton Ambassador

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    Which projector calculator are you using?


    The one here is showing exactly what you are getting. With the zoom at minimum and a throw distance of 12 feet, the projector will produce an image that is 39" high and 80" wide for a diagonal measurement of 70" (that's a 16:9 aspect ratio).


    If you used a different calculator, please let us know. If it is that far off, we should be sure to avoid recommending that calculator to other HTF members.
     
  10. rajung

    rajung Auditioning

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  11. Jason Charlton

    Jason Charlton Ambassador

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    You must be setting something wrong.


    In the zoom box on the left side of the calculator, pull the slider all the way down (zoom of 1.0).


    Set Aspect Ratio to 16:9.


    Drag the indicator on the Throw Distance slider to 12' 0" (or enter the value in the input field to the right of the slider).


    There you go.


    With the zoom at maximum (1.49x) and at a throw distance of 12' 0" you would get an image size of 58" x 104" (or 119" diagonal).
     

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