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Topic: 8 feet viewing distance for 1080p projector?
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Joined: May 1, 2022
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Hi everyone,

This is my first post on the forum. Writing to seek some advice on a Full HD projector setup for a small room with an 8.5ft - 9ft viewing distance.

By my calculations, I can achieve a 100" to 110" 1080p image from a ceiling-mounted Full HD short-throw projector.

My questions are -

1. Is 8-9 feet an enjoyable viewing distance for a 100" Full HD image?
2. I am considering Optoma GT1080HDR, Benq HT2150ST and Benq TH671ST. Which of these would be ideal, or do you have any other recommendations?
3. Alternatively, should I go with a longer throw like the HT2150A and reduce my screen size?

Projector budget - USD 1000
Primary use - movies (no gaming)
Rooom environment - Will install blackout curtains and paint walls dark

Thanks a ton in advance for your help!
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Joined: Mar 28, 2005
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The 2150ST can throw a 110" diagonal image from a 6' throw distance.

Be aware that if you have it all the way back in your space, it would be a much larger image. This is just something to keep in mind if your goal is to have it ALL the way back in the room. At 8' lens to screen, the smallest image it would make is 132" diagonal, which would be too large for a 8'-9' eyes to screen viewing distance.

Typical screen size for most viewers is 10" to 12" of diagonal for each foot of viewing distance. So, certainly a 100" diagonal would be acceptable with a 8' viewing distance.

I'm not sure exactly how much distance you have, and what your ability to mount the projector and move it around is, but the 2150ST is a excellent choice and better than the other two you listed. It is really designed for home theater first. If you have a bit more distance, the HT2050a is another excellent choice, but may push your image size down a bit.

Frankly, if the room really is small, you may want to consider something like a large flat panel display for around $2,000. You can pick up a 85" diagonal television which doesn't require a dark room for excellent results. Not sure exactly what your room is like, and you don't have to deal with audio separately the way you really need to with a projector.
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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Joined: May 1, 2022
Posts: 2
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Thanks for your response AV. I plan to ceiling-mount the projector such that I get an image between 100-110". I just wan't sure if 8ft viewing distance is too close to watch a 110" screen with 1080p content (mainly movies).

Your answer clarifies. I think I'm going to go with the 2150ST.

Also, I'd prefer an HD projector to a large panel 4KTV for budget reasons and since I already have a very good 5.1 audio and receiver setup.

Thanks again!


Quote (AV_Integrated on May 2, 2022 4:36 AM):
The 2150ST can throw a 110" diagonal image from a 6' throw distance.

Be aware that if you have it all the way back in your space, it would be a much larger image. This is just something to keep in mind if your goal is to have it ALL the way back in the room. At 8' lens to screen, the smallest image it would make is 132" diagonal, which would be too large for a 8'-9' eyes to screen viewing distance.

Typical screen size for most viewers is 10" to 12" of diagonal for each foot of viewing distance. So, certainly a 100" diagonal would be acceptable with a 8' viewing distance.

I'm not sure exactly how much distance you have, and what your ability to mount the projector and move it around is, but the 2150ST is a excellent choice and better than the other two you listed. It is really designed for home theater first. If you have a bit more distance, the HT2050a is another excellent choice, but may push your image size down a bit.

Frankly, if the room really is small, you may want to consider something like a large flat panel display for around $2,000. You can pick up a 85" diagonal television which doesn't require a dark room for excellent results. Not sure exactly what your room is like, and you don't have to deal with audio separately the way you really need to with a projector.