Numerous 4K projectors have a distinguished feature which is known as ultra short throw projector. First we need to understand what is throw distance. Throw distance is the distance between the screen and projector when an image is formed on the screen. So ultra short throw projectors are the projectors in which the necessary distance between the screen and the projector lens is decreased to a large extent. This feature allows you to use the projector to project sharp large sized image in small spaces. Therefore, you do not need a spacious room for projecting large sized images. Moreover, in these projectors images are not easily blocked even if people move around.