A:
First, for best results, we do not recommend casting images (especially video) on a light colored wall. While you will certainly get a viewable image, the color reproduction will not be accurate. Wall textures may also create image artifacts.
What screen you use depends on the viewing audience and the amount of light in the room (ambient light). Say the seating arrangement requires that you have a wide viewing angle and that the room has some ambient light. Choose a screen with a lower gain (for example, a DaLite HC-Da-Mat, a gray screen with 0.8 gain). If your viewing angle is narrower, you can choose a higher gain screen (for example the Stewart Grayhawk). Higher gain screens are also better for images larger than 100" wide. One issue to be aware of is that the higher the gain on a screen, the more likely you will notice "hot-spotting" and sparkles in the image. You should work with your screen supplier to make sure you get the appropriate screen for your circumstances.
A: We strongly suggest that you use an InFocus-approved ceiling mount with your projector. There are two basic reasons for this.
First, our mounts are designed for a specific projector. They are built so they do not interfere with air circulation in and out of the projector. This is an important because when you install a projector on the ceiling, you are installing it in the warmest part of the room. Our mounts are made to bear the weight of the projector. We don't have any 'one-size-fits-all' mounts. We use heavy-gauge steel and sturdy fasteners.
Second, should anything happen to your projector due to a non-approved ceiling mount, your warranty will not pay for the repair.
