Calculating drop distance from ceiling for W1070 - AVS | Home Theater Discussions And Reviews
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post #1 of 7 Old 11-19-2013, 07:46 AM - Thread Starter
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First projector and I've gotten myself all kinds of confused when it comes to throw distance, distance from ceiling, etc.

Can anyone tell me exactly what I need to do?

Projector: BenQ W1070
Screen is 120"

The wall that the screen will be mounted on is 13ft. wide and 8ft tall.

The ceiling where the projector will be mounted is vaulted so where the projector location is located is 10ft. hight.

Two questions - How far should I mount the projector from the screen wall with this project and that screen size and how far down will the extension pole need to go?

If I'm interpreting the results on BenQ's site right, it says I'd need a throw distance of 10ft and 2ft of drop from ceiling.

Like I said, using both the ProjectorCentral and BenQ projectors has just got me confused.

Thanks for anyone who can offer some clear advice.
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post #2 of 7 Old 11-19-2013, 08:57 AM
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The vertical lens shift adjustment on the W1070 provides a very limited range, for the vertical location of the projector, of only about 15% of the screen height. For a 120" screen this would be about an 8" range and the lowest position you can mount the projector is about 3 inches above the top of the screen. I would suggest you mount the projector such that the center of the projector's lens will be about 7 inches above the top of the screen. As for the projector to screen throw distances the minimum is 10 ft. and the max. is 13 ft. with a 120" diagonal screen. I would suggest something around 11 ft. if that is possible in your room. Remember this is the horizontal distance from the front of the projector's lens to the screen's surface and not the distance to the center of the ceiling mount..

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post #3 of 7 Old 11-19-2013, 09:10 AM - Thread Starter
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Thanks! That helps a ton.
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post #4 of 7 Old 11-19-2013, 01:08 PM
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The exact drop you need is a math question more than anything else, and you will need a mount which accepts standard 1.5" threaded pipe, such as a Chief Elite mount.

What you want to do is find a good height/location for your screen that makes you comfortable. Generally your eyes should be about a third to halfway up from the bottom of the screen, but sit back in your chairs and find that height that makes you comfortable.

Now, with that in mind, you can measure to find out where the top of your screen is.

From there, measure up 6" or 7" more and that is where the center of the lens should be. Let's say the top of the screen is 6'6" from the floor. That means the center of the lens should be about 7' from the floor. If it's exactly 10' to the ceiling, then you want the center of the lens to be 3' from the ceiling.

Measure the mount stack height when on the projector and down to the center of the lens. This may be about 4" or so, which may mean you need an extension pipe which is 2' 8" long. If the mounting plate at the ceiling has some height to it, then you may need to take that into consideration as well. But, you must break it all down into bits and pieces then add them all up to get your exact number.
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post #5 of 7 Old 11-20-2013, 08:09 AM - Thread Starter
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good information.

So let's say that I'm going to mount the top of the screen approximately 93" from the floor. That means I need to mount the center of my projector lens approximately 100" from the floor. With a 120" ceiling, I'm thinking these are the items I need to purchase. Can someone confirm that these three Peerless products are what I would need to purchase?

Once again, thanks for walking a first-timer through this...

http://www.amazon.com/Peerless-PRGUNV-Precision-Universal-Projector/dp/B000TXNS6G/ref=sr_1_1?ie=UTF8&qid=1384962936&sr=8-1&keywords=peerless


http://www.amazon.com/Peerless-ACC570-Joist-Ceiling-Mounts/dp/B000BITSTA/ref=pd_bxgy_e_img_y

http://www.amazon.com/Adj-Ext-Column-12-To/dp/B004F03JN6/ref=lh_ni_t_mi?ie=UTF8&psc=1&smid=A17MC6HOH9AVE6
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post #6 of 7 Old 11-20-2013, 12:16 PM
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For the mount you can use the ~$19 ceiling plate you linked to or you can just go get one of these for probably $3-5:

You can use the $55+ adjustable downrod you linked to or you can buy 1.5" threaded pipe at any local hardware place for another $5-10

Also, I highly recommend the Chief mounts.
http://www.chiefmfg.com/Mount-Finder/BENQ/W1070

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post #7 of 7 Old 11-20-2013, 01:00 PM - Thread Starter
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thanks!
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