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Discussion Starter · #1 ·
The sharp manual shows that the minimum projection distance for a 100" diagonal 16:9 screen is 13'2" and the maximum is 17'11". Is it best to be at one end of the range or the other or right in the middle?
 

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Does not make a difference.

In this case, the sharp - with the help of its zoom lens is able to project a 100" image when fully zoomed in @ 17'11 and when fully zoomed out @13'2 distance of screen to projector. In both cases, the same amount of light is hitting the screen.


Ok, for screen/projector choice, it goes like this.

Choose projector model.

Choose screen size.

Decide projector to screen distance. (i.e. your room size)

Make sure the chosen projector will display image that fills up the chosen screen at chosen distance. This is referred to as the 'throw' of the projector.


However, for a given projector, the smaller the screen, the brighter the image.
 

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Discussion Starter · #3 ·
But don't you want to be able to take advantage of being able to zoom in or out after the projector is mounted? And which is better to be able to zoom in or out? In other words, if mounted at 13'2" you would no longer be able to zoom out, correct?
 

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That depends on whether you want to run a constant height, constant width, or neither; it also depends on whether you want to use a vertical compression anamorphis lens, horizontal stretch anamorphic lens, or neither; it also depends on whether you want to use the power zoom in to aid in any of the above, use digital scaling to aid in any of the above, or neither.
 

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Richard,

You're knda jumping the gun here.:)

Zooming in or out may be relevant depending on your screen's aspect ratio, vis-a-vis how you want to handle other ARs.


Take my (constant height) setup for instance:


I use a 2.35:1 AR 110"x47" screen. I chose this size and AR because, (1). I mostly watch scope movies in my theater and (2). my room's height, width and length dictated that size. (Room dimensions usually affect the choice of screen size and AR).


When watching 2.35:1 movies, my DILA FP is zoomed out all the way - producing an image thats 110" wide and 47" tall.

Whereas when watching 16:9 or 1.85:1 fare, the projector is zoomed in all the way - producing an image thats 83.5" wide and 47" tall.


I also want to add that I would probably not be using the zoom in this manner if it weren't motorized.

Quote:
Is it best to be at one end of the range or the other or right in the middle?
In my case, I am definetly not in the middle, but I am using the zoom at both ends of its range.


I have simplified the description of my setup, i.e. not delving into the details of how a 4:3 FP is being used with 2.35:1/16:9 screen.
 

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Many of the experts here recommend trying to mount towards the far end of the zoom because it can result in better overall contrast.


There are a variety of things to consider regarding the throw you choose. All else being equal though you may want to mount if so that its not directly overhead in your optimal seating position, just to help minimize the fan noise.
 
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