Ceiling mounting math question...

Maybe a newbish question but...

PA70G's native ratio is 16:10. If you project 4:3 wouldn't it add black bars left/right that would overlap with the other pj's projection?Or do you use some kind of lenses?

Many people (including myself) will mount projectors at the top of the screen height and have the lense shift downward.

I don't know the total specifics of every projector, but in my best setups - I've tried to mount the lense directly in the middle of the projected image - so no lense shift (vertical) is required. I try to shy away from horizontal lense shift in any situation, if at all possible. Most people do not have their projectors mounted in the middle of the image, as they would bang into it. You can get it close though (within a 1.5 ft or so). It's probably behind your seating anyway.

You usually don't "tilt" your projector. You mount it completely level, and use manual or electronic circuitry to move the image up and down.

Finally, if you want to give us a reason for using 2 projectors - I'm guessing it's because you want a super large image. You will probably need some edge blending software. I would visit Wide Screen Gaming Forum (WSGF.com) for more information. I frequent there, trying to figure out how to do a 2 or 3 projector installation as well (for super wide/eyefinity gaming).

You will also need edge blending software, you're going to see the line between them.

You could also project in portrait mode (rather than landscape) - I'm not sure if every projector would support that - check into it. Basically that'd give you a taller image, I think the aspect ratio will still be messed up though.

There is a community out there who does do two 16x9s or 3 16x9s side by side, for those wider images - racing simulations and flight simulations.

I was going to use warpalizer. It's stlil expensive, but I think it's cheaper than 800.