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Topic: Help - Ceiling Mounting Vivitek HK2288
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Joined: May 4, 2018
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After Much research of projectors I've decided on a Vivitek HK2288. Before I purchase it, I had a concern on keystone and Lens shifting. I am planning on Ceiling mounting the projector to acquire a 120" diagonal size at a throw distance of 14'7" with 1.25x Zoom. My Ceiling height is 10Ft. Can anyone help me with this setup? Will I be able to get a picture that has correct keystone and accurate lens shift with mounting this Projector on my ceiling? Or choose another Projector for my setup?

I have plenty of room (approx 20') to move the projector closer or further from my wall if need be.

Thank you for all the help in advance.
[Edited by Shadowven on May 4, 2018 at 9:16 AM]

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Lens shift of that model is 16% of image height, with a neutral position even with the top edge of the screen when ceiling mounted.

With a 120" diagonal, the lens to screen distance may be anywhere between 12'2" to 18'3", whatever works best for you.

From the top of the screen, the lens must be between 9" above the top of the screen, to 9" below the bottom of the screen.

If your screen is 40" from the ceiling, then the center of the projector lens must (MUST!) be between 31" from the ceiling to 49" from the ceiling.
AV Integrated - Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.
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Quote (AV_Integrated on May 4, 2018 5:15 PM):
Lens shift of that model is 16% of image height, with a neutral position even with the top edge of the screen when ceiling mounted.

With a 120" diagonal, the lens to screen distance may be anywhere between 12'2" to 18'3", whatever works best for you.

From the top of the screen, the lens must be between 9" above the top of the screen, to 9" below the bottom of the screen.

If your screen is 40" from the ceiling, then the center of the projector lens must (MUST!) be between 31" from the ceiling to 49" from the ceiling.


Thank You AV_Integrated for your reply. This will help me quite a bit. It seems i'll have to maybe get an extension for my ceiling mount to lower the height of the lens in order to prevent the screen having to be too high. Is the lens shift a mechanical change or electrical change through settings?
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Lens shift is a physical function of the projector. It moves the lens optics up and down to shift where the image passes through the lens. It should have no negative impact on image quality.

This is in contrast to keystone correction, which degrades image quality by mapping the rectangular image into a trapezoidal shape, throwing out pixels and changing the actual shape of the original image.

The use of lens shift is shown on page 2, and page 13 of the owner's manual.

http://www.projectorcentral.com/pdf/projector_manual_9852.pdf
AV Integrated - Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.
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Awesome! Thank you again. You have helped me out tremendously. I greatly appreciate it =D. I'll be mounting my Projector Next week. Take care!