Distance of projector
Projection Ratio/Projection Distance
Projection ratio refers to the ratio of projection distance to screen width. The projection ratio is a fixed parameter of the lens, which determines the position of the machine when projecting a picture of a specified size.
The projection ratio is a fixed value, indicating that the projection lens is a fixed focus lens, which is commonly used in portable models.
The projection ratio is a standard value, indicating that the projected lens is an optical zoom lens.
projection ratio * screen size=projection distance.
Ultra Short Throw: projection ratio<0.3, projection distance<0.5m
Small space, short projection distance, suitable for home&office
Short Throw: projection ratio<1, projection distance<1m, short projection distance, suitable for office & teaching environments.
Long Throw: projection ratio<3, projection distance<3m, commonly used for home & office.