Projector display horizontal fits, vertical is too big. - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 8 Old 09-22-2019, 02:39 PM - Thread Starter
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Projector display horizontal fits, vertical is too big.

Hello, I just installed my new BenQ HT-3550, replacing an old w1070 projector. Issue is that after properly centering the projector, the image fits perfectly horizontally, but vertically it extends about 2 inches high on the top and bottom. Everything is properly setup for 16:9 aspect ratio.

Why would a projector display the image larger vertically than horizontally? Zooming in to fit top, means the sides are now too small.

My display is an EluneVision AudioWeave 4k 100'.
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post #2 of 8 Old 09-22-2019, 02:47 PM
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measure the screen (image only) to be sure it is actually 16:9 (1.78)

Also what image are you shining on the screen?
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post #3 of 8 Old 09-22-2019, 05:37 PM - Thread Starter
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Quote:
Originally Posted by BIGmouthinDC View Post
measure the screen (image only) to be sure it is actually 16:9 (1.78)

Also what image are you shining on the screen?
The EluneVision Screen, white portion measures: 1.345m x 2.40M
The projected image is: 1.41m x 2.39M

As you can see the projected image nearly perfectly fits the width, but its too tall. The keystone setting on projector is -7.
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post #4 of 8 Old 09-22-2019, 08:05 PM
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you should not use any keystone for HT use, it doesn't preserve the integrity of the image. It mushes pixels. not sure if that is the cause of the problem. to get rid of keystone you need to move the projector vertically.
I asked what image? internal test pattern, Cable box, Bluray etc. we need to determine if that is the potential source of the problem.
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post #5 of 8 Old 09-22-2019, 08:38 PM
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Double check you are running the latest firmware.
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post #6 of 8 Old 09-23-2019, 09:15 AM - Thread Starter
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Quote:
Originally Posted by BIGmouthinDC View Post
you should not use any keystone for HT use, it doesn't preserve the integrity of the image. It mushes pixels. not sure if that is the cause of the problem. to get rid of keystone you need to move the projector vertically.
I asked what image? internal test pattern, Cable box, Bluray etc. we need to determine if that is the potential source of the problem.
Thanks. Right now unfortunately moving the projector vertically down, to the point that no Keystone is used is not possible. I am going to try to move it a little down. I measured the image from the test pattern & also the one coming off the X-Box One, both measure the same. I also updated to the latest firmware.

The projector is connected to a Marantz 7702, which is connected to an X-Box One. All machines are running on the latest firmware's.
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post #7 of 8 Old 09-25-2019, 05:35 AM
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I think your problem with needing keystone is probably due to incorrect mounting. If you hang a projector from the ceiling you need to invert it. That coupled with the lens shift should sort you out.

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post #8 of 8 Old 09-25-2019, 05:43 AM
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I would test the image without any keystone adjustment and see if it is 16:9. Even if you have to take the projector somewhere else and shine on a wall you might have your answer.
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