A bit of an odd one... In this thread I tried to explain about my lounge/kitchen setup. Basically, this is how it looks: The big black lines are walls. Sorry about the drawing but it doesn't need to be a masterpiece to convey my question So I have two places where I can mount the PJ. One is on the back wall (or ceiling) and is the 4.4m I spoke of in my other post (from approx front of PJ to front of screen) and the other is inside the kitchen just behind the imaginary line of the wall (were it to continue towards the right wall). What I'm wondering is how quickly the PJ's focal light path spreads out when it exits the lens? I assume with a long throw light the HS10 it is quite narrow at first (hence the ability to long throw)... I'm basically quite curious as to how far back into the kitchen I can mount an HS10 before the picture gets cut off by the wall...... with the goal of making it as far away as possible in order to reduce the noise annoyance factors! The other option is to wall/ceiling mount in front of that wall I've shown, and then I'd have to shift my kit to the left a bit so as to avoid any keystone... The image will be smaller since its nearer the screen This whole business is b****y tricky! (plus I have a grand piano to deal with which I swear I will make into firewood one of these days .... ). Any thoughts/comments?