Ultra short throw means the projector sits centimetres from the screen, not metres. If your X141Q or X171Q is missing its lens, or the current one's gone soft and the image is washing out at the edges, the XP57ZL is the dedicated OEM replacement. It's built specifically for those two models – no cross-compatibility with the XPA range. You get the motorised zoom, the ultra-short-throw optics, and a picture that fills the screen from a position you'd never be able to reach with a standard lens. Swap it in, align, done
