How to Use Chameleon™ Projection Scrim Screen
Using a scrim for projection is similar to using a screen, with one key difference: Always project from an angle (from left, right, top or bottom). This prevents hotspotting and improves the projection.
Many people fear that their projector won't work at the desired size. We suggest looking at the specs for the projector. In those specs the size of projection will be measured diagonally. Or you can test the projector on a large white wall. If the image is strong on the wall at the desired size, then it should work. When you test this, measure the distance for the projector placement.
Lots of people need a little guidance on how to project: What size projector? What distance to place the projector at? or How to solve common projection issues?
Call us to discuss your project. Call direct 1-812-579-5063 or look at the guides below for 'good faith' advice.
How Far Away Does the Projector Need to Be?
The distance that the projector needs to be from the scrim in order to get the image the size you wish can be estimated. Try our calculator!
The distance the projector needs to be away from the screen is called the Throw Distance. This distance is determined by the projector that you use (more specifically by the lens of the projector) and the width of the projection image that you want to get. Every lens of a projector has a Throw Ratio, or range of Throw Ratios.
The formula is Throw Distance= Throw Ratio x Width of Image
Format or Shape
The 'format' of the projection is the ratio of width of the screen to height. There are three common formats:
of Projection Screens
- NTSC/Full Screen--4:3 ratio. A standard projected TV or computer screen will match this format.
- Widescreen--16:9 ratio. New release DVDs are released in this format, as are HDTV and movie screens.
- Square--1:1 ratio. Square format is common for a standard overhead projector in a classroom.
If you are projecting scenery within a theater you might not be matching these formats and may not need to.
How Big a Projector Do I Need?
Projection strength is determined by screen size, room size or how close you can place the projector, amount of ambient light and of course projector strength. Projector strength is measured in 'lumens'. So how strong a projector do you need?
For a very small screen up to 8 foot wide, a 2000 lumen projector (with a SVGA resolution) should work. For a slightly larger screen up to 12 foot, 3000 lumens with an XGA resolution should work. For a 16 foot image shoot for 4000 lumens with XGA. For larger, find a projector in excess of 4000 lumens. These sizes assume a space with good control of ambient lighting. Always check the projector manual or specs if in doubt.