8mm Forum: Advice and helpful thoughts please

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Posted by David Pannell (Member # 300) on November 10, 2009, 06:19 AM:

Hi again everyone.

Apropros my home cinema, I am in a quandary with regard to the best placement of my new ceiling-hung screen.

The room is L shaped. It comprises an area for the audience of 18ft long x 15ft wide, with the smaller part of the L extending the longer length by another 7ft. Its width is 5ft.

The thing is that the projector will sit in the 7ft x 5ft part of the room, but as it is obviously offset to one side, where is the best place to install the screen?

There seems to be three options:

1. Perpendicular to the projector, which means it won't be in the centre of the far wall, (which has a large window in the middle).

2. In the centre of the window (wall) but still mounted square on to the room, resulting in some out of focus from side to side of the screen. (Don't know how bad this will be).

3. Still in the centre of the wall, but angled to be perpendicular to the projector.

As I see it, there is clearly going to be a tradeoff between aesthetics and technical correctness.

What does everyone think?

(Thanks for wading through this).

Posted by Chip Gelmini (Member # 44) on November 11, 2009, 08:31 AM:

David

What you wrote and how you wrote it seems a bit confusing. Could you possibly post some pictures and maybe you might get some positive answers.....

Just a thought with all due respect....

CG

Posted by Jean-Marc Toussaint (Member # 270) on November 11, 2009, 09:19 AM:

Dave, I get a rather clear idea of how your room looks like (made a sketch). I would favor #1.

Posted by Martin Jones (Member # 1163) on November 11, 2009, 09:23 AM:

How thin are you David, or do you have one of those left-handed Ampros? Joking apart, move the projector further (up) from the corner and use a "periscope" of front silvered mirrors along the left hand wall of the large part, so that your axis is central to the right hand wall.
Martin

Posted by David Pannell (Member # 300) on November 11, 2009, 09:29 AM:

Hi Guys,

Jean-Marc has it right!!! - except that it is a mirror image of his sketch, with the jutting out portion of the room for the projector at the bottom of the sketch, rather than at the top - so no, Martin, I don't need a left-handed machine!

The periscope idea is an interesting one, but somehow I think not. A bit OTT!

Well done, Jean-Marc, as the saying goes, "Great minds think alike - fools seldom differ"

Posted by David Pannell (Member # 300) on November 11, 2009, 01:14 PM:

JUST TO SAY......

I shall be away yet again on another business trip from this coming Friday 13th, for 2 weeks!

Please keep the ideas coming, and I'll respond upon my return.

With grateful thanks,

Posted by Michael O'Regan (Member # 938) on November 11, 2009, 01:19 PM:

As I said to David privately, I would favour a centrally placed screen, slightly angled to square with the projector. Masking would hide this slight angulation. The screen at one side as Jean-Marc describes would irritate the hell outta me and I feel would look odd to an audience.

Posted by Martin Jones (Member # 1163) on November 11, 2009, 01:36 PM:

And it would irritate me, too, which is why I suggested an "OTT" periscope to move the optical axis, a method used extensively in single screen auditoriums to make multi-screen conversions.
Martin.

Posted by David Pannell (Member # 300) on November 11, 2009, 02:31 PM:

Still thinking, chaps. Lots of interesting ideas, which is most helpful.

I must admit, I'm not too keen on having the screen off to one side......why aren't houses built PROPERLY??

I can see that I'll have much to digest before making the final decision, but I'll certainly take all suggestions into consideration.

I want to get it right first time, for many reasons, not the least of which is not to have Carol keep pulling my leg about having got it wrong, or that it all makes the room look dreadful!

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