Originally Posted by fekish
i am totally new to projectors and i bought 2 days ago my first one: Acer X1340WH.
However i don't understand some basic things yet.
Is there a specific distance that the projector should be from the screen in order to get the full results?
The projector should be exactly in the middle of the wall that is projecting and parallel to the wall in order to have best results?
Is there a way to increase decrease size of picture? I turned the rotating lens, but it adjust just to a minimal level the screen size.
i know that are probably dump and basic questions, but i need to start from somewhere...
Seriously - These are bad questions because the owner's manual for the projector tells you every single answer to the questions you just asked.
Page 3 of the manual tells you exactly where the zoom and the focus rings are for the projector. They are both right behind the lens, on top of the projector, side by side. Seems like you have played with the zoom ring, but didn't play with the ring right next to it to adjust focus. You need to adjust focus after adjusting to the proper size.
If you have a specific screen size you want, then the projector LENS must be the proper distance to achieve that screen size. Unfortunately, Acer doesn't properly list the throw ratio in their manual... because they are a computer manufacturer who imports cheap projectors from overseas. So, you will have to physically move the projector forward/backward to get it close to the right location for your screen size, then adjust zoom/focus as appropriate. They DO have information on this on page 14 of the manual it looks like. So, for a 100" diagonal the lens to screen distance should be about 3.5m (about 11'6")
Projectors should always be square to the wall with the lens centered left/right on screen. The height of the projector, in relation to the screen typically has the projector under the screen by several inches. The manual makes this distance almost completely impossible to tell without doing some math. But, just turn on the projector, and with it flat, measure things out at the proper screen size.
Really though, read through the manual, then ask whatever questions you may have.