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Backyard Theater - Outdoor Movies

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Author Topic: Any downsides to using Short Throw over normal throw?  (Read 1161 times)
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« on: May 16, 2017, 12:18:54 pm »

Hey, longtime fan of this forum.

We're looking at setting up our own viewing space next to our barn and bonfire.  I plan to hang a screen on the side of the barn that's maybe 10-12 ft, depending on our material selection.  I've been leaning toward Carl's blackout material.

Anyway, I'm considering a short throw like Optoma's GT1080, as it has the right specs and the short throw means we can use it for halloween window displays and other side fun.  I wanted to check w/ you guys and see if there's a reason to select something more like an HD142x instead.  I know the alignment is a little more specific on the short throw, but other than that I think it's a good option unless you can tell me otherwise.
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« Reply #1 on: May 17, 2017, 11:04:07 am »

There's no downsides other than placement flexibility that I'm aware of. Without a zoom lens, you need to calculator exactly where the projector needs to be placed in order to fill your screen size.

Also, if you use a short-throw with too much more than the built-in offset, you can end up with a picture that is half out of focus. To illustrate I'll give you an extreme example: imagine the projector at ground level and your screen beginning 10 feet off the ground. Because the optics between the upper half and lower half of the projected picture is so extreme, you'll end up with half of the screen out of focus. For typical usage, this would never happen, but it's worth thinking about when you decide how the components in your theater will be arranged.

Phillip Hullquist
I toured the U.S. showing outdoor movies in 2010 on Carl's 16x9 screen.
Now I own eight commercial rental screens ranging from 9x5 to 30x17!
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