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opv
Joined: 18 May 2010
Posts: 202
Location: Emek Hefer,Israel
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| Posted: Fri Nov 02, 2012 6:55 am Post subject: not enough Scheimpflug range |
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Hi,
My projector is BG1209s with continues Scheimpflug adjustment.
The room is small and the lens, HQF900 or HD120 (I have both) isn't ideal for the small screen.
The main problem is that I can't get even focus from to to bottom. the Scheimpflug screw gets to the limit and does not allow me any more range.
Is there a simple way to add more range to the Scheimpflug adjustment?
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Ile
Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland
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| Posted: Fri Nov 02, 2012 7:21 am Post subject: |
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Easiest way is to add washers under lenses.
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opv
Joined: 18 May 2010
Posts: 202
Location: Emek Hefer,Israel
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| Posted: Fri Nov 02, 2012 7:25 am Post subject: |
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Hi Ile,
Can you give me some more details about this option.
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Ile
Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland
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| Posted: Fri Nov 02, 2012 8:07 am Post subject: |
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Remove one lens and put 0.5-1.5 mm washers to bottom row screws (ceiling mounted, top row for table mounted), between lens and LC hardware.
Then new try for Sheinpflug adjustment.
Washers are used for Sheimpflug adjustment in many AC projector.
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opv
Joined: 18 May 2010
Posts: 202
Location: Emek Hefer,Israel
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| Posted: Fri Nov 02, 2012 8:44 am Post subject: |
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Great!
I'm on my way to try.
Ile, thanks again.
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Fri Nov 02, 2012 1:02 pm Post subject: |
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Ile you're a genius! 
_________________
Domenico (Barco fan!)
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Fri Nov 02, 2012 2:00 pm Post subject: Re: not enough Scheimpflug range |
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| opv wrote: | Hi,
My projector is BG1209s with continues Scheimpflug adjustment.
The room is small and the lens, HQF900 or HD120 (I have both) isn't ideal for the small screen. |
Could you say the dimensions of your room, the distance between screen and pj?
Can you enlarge image to cover the tubes surface and cover the screen?
Wich is the dimension of screen?
I asked these questions because in the future I would like to install a 9" crt (with relative lenses) but I've also a small room like you.
_________________
Domenico (Barco fan!)
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opv
Joined: 18 May 2010
Posts: 202
Location: Emek Hefer,Israel
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| Posted: Fri Nov 02, 2012 3:09 pm Post subject: |
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My room is 3.5X3 meter
The throw distance is 3.5m minus projector body length.
Screen width is ~1.8m.
The image uses all the tube face.
The only issue I had is this scheimpflug problem, but now that I added the washers it's gone and just rquires some tweaking.
My previous PJ was a BG808S with HD8 lens, it gave me a bigger picture and had no Scheimpflug problems.
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