How to work out projector placement

[Too Late]

Hi

I have a room where i want to set up as a film room.
its 2.4m x 5m. It has a vaulted ceiling.

The idea is to have the projector project the image on one of the 2.4 meter walls.

Meaning i have about a 100" screen to work with

Roughly the projector will be about 3 meters from the screen. But with the vaulted ceiling, how high are projectors normally?

Thanks
N

[kingston12]

It depends on the type of projector that you use.

With my Benq W1070, it is mounted almost exactly at the height of the top of screen it is projecting on to.

The best thing to do is to use one of the calculators. Here is the one for Benq as an example:

http://www.benq.com/microsite/projector/throwratio...

[Too Late]

Thanks, i will check that out now

Thanks!

[kingston12]

Too Late said:

Thanks, i will check that out now

Thanks!

The only thing to be careful of is the variety of placements that the projector companies tell you that you can use. Don't get into using 'keystone' correction unless you really have to as you will lose resolution. Physical 'lens shift' is fine, but a reasonable amount is usually reserved for the more expensive models. The Benq I have has a small amount of vertical lens shift, but no horizontal.

[megaphone]

As said, ideally you want it mounted close to the top of the screen. You also need to consider throw distance, it varies on different models and most do have zoom, however a rough rule of thumb is 1.8 x screen width back. So on a 2m screen the projector needs to be 3.6m back. But check the specs of each model carefully

Also the longer the throw the higher you can mount the projector without an acute angle.

[JustinP1]

I've had the Benq W1070 and W1400 set up at home.

The latter has a better range of throw.

With the 1070 the smallest picture possible was about 100 inch diagonal at 3.6m. Obviously as you go back, this increases. I ended up with the W1400 mainly to get the throw I needed.

The other thing to consider is that the projector (at least the Benqs anyway) is set up to put the picture not straight ahead, but *above* the line of the projector. In my case, with the projector at about 4 1/2 foot off the ground, it vertically projects to 4-8 feet height.

This can be adjusted UP about a foot.

Of course, if you are mounting upside down near a ceiling, then all of the above is reversed. Ideally, with the Benq range anyway, the optimum would be near the ceiling, and the only way to use them without the keystone correction, which I have to currently use.

Edited by JustinP1 on Thursday 5th February 17:34