A short throw projector is a type of projector that can produce large images from a short distance, typically between 3 to 8 feet away from the projector to the screen. They have a throw ratio between 0.4 and 1, which means that they can produce a large widescreen from just a few feet away from the wall. Short throw projectors are usually seen from projectors installed on the wall or the ceiling closer to the wall, anywhere that is close to where the image will be projected. They are ideal for small spaces, classrooms, and training facilities where there is limited throw distance. Short throw projectors are also suitable for gaming, as they eliminate the need for a large distance requirement, making it easy for them to blend with your living space.

In contrast, long throw projectors are designed for long-distance projecting, often from six feet upwards, which is quite suitable for large theater rooms, exhibition halls, and conference rooms. They have a throw ratio greater than 1, which means that they work best from longer distances. Long throw projectors are often more moderately priced than short throw projectors. However, they cast images over long distances and are highly vulnerable to being obstructed by obstacles or peoples shadows. They also cut out quite a large portion of space that can be used within the home theater room as they often require to be far from the screen to get a large and preferable image display.

In summary, the main differences between short throw and long throw projectors are the distance they require to project an image on a projection screen or wall, the throw ratio, and the ideal space. Short throw projectors are ideal for small spaces, classrooms, and training facilities, while long throw projectors are suitable for large theater rooms, exhibition halls, and conference rooms.