All projecting-screens are diffusing the light from a projector - if not diffusing, the screen will be a mirrow and no image will be created.

All screens manufactured by DAF Screens A/S are the DIFFUSION-type, diffusing the light evenly both vertical and horizontal, creating the image in the diffusion-layer of microlenses cast in the acrylic substrate.

Before choosing a projection-screen, it's important to realize certain issues:

When these issues are established, you will be able to calculate how many ANSI-lumen you have per m² (area) by dividing the area of the screen with the quantaty of light (ANSI-lumen) coming from the projector. this number (e.g. 1000 ANSI/m²) is essential in choosing the right screen to your application.

The projectors lens-ratio (e.g. 1:1,2) is also important for the screen required, because the all lenses has a "viewing-cone" and the lens-ratio tells you the distance required between projector and screen to obtain a certain area.
A zoom-lens (e.g. 1:4) position the project far from the screen and the angles in the screen-corners (see drawing) will be "moderate"has a narrow wieving-cone. A fish-eye-lens (e.g. 0,6:1) has a wide wieving-cone.

 

A fish-eye-lens (e.g. 0,6:1) has a wide viewing-cone and the angle in the corners will be steep, so some light might be reflected instead of transmitted.