Where do you place your new projector?

With the projection ratio you can calculate from which distance the projector projects an image of 1 meter wide. If the projector has a projection ratio of 1.86:1, you have to place it 1.86 meters from the wall. You can double this distance for an image width of 2 meters. Some projectors have a minimum and maximum ratio, such as 1.86:1 - 2.04:1. This means that they have a zoom function that makes the image larger or smaller. This gives you more room to play with during installation.

With the lens shift function, you can change the direction of the lens, so that you move the image horizontally or vertically. This is useful when you cannot position the projector directly in front of the screen. This problem arises, for example, when you mount the projector on the ceiling. There may also be furniture or other obstacles in the way, so that the projection does not fall exactly on the screen. In this case, the lens shift function offers a solution.

Are you aiming the projector diagonally up or down? Then the image looks more like a trapezium than a rectangle. Fortunately, most projectors have keystone correction, with which you change the position of each angle of view. Just like with lens shift, you can also easily change the direction of the image. The disadvantage is that this affects the image quality. So only use this function to adjust the viewing angles or if the projector does not have a lens shift.