Examples of different aspect ratio screens - perfect blending - front or rear projection:
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4:3 - the original computer graphics and television ratio, still widely used for presentations and as PiPs for many clients computers. Often preferable over 16:9 for 'on screen' camera relay.
16:9 - wide screen - the same ratio as most new laptops and televisions - same as HDTV - becoming more common than 4:3. Not a nice format for on screen camera of a single person full screen.
2.5:1 - two conventional projectors blended to make a single screen. Works well for sponsors logos, presenter graphics in a PiP and live camera in a portrait PiP.
3:1 - two wide screen projectors blended to make a single screen. Using 1920.1200 projectors a full HD video can be played in a PiP with background above and below.
3.7:1 - three conventional projectors blended to make a single screen.
It is very impressive with full screen graphics.
4.6:1 - three wide screen projectors blended to make a single screen. Wide screens are an impressive alternative to multiple screens at wide venues when the ceiling height is restrictive.
12:1 - eight wide screen projectors blended to make a single screen.
Using HD projectors the screen would be 13000 x 1080 pixels - over 14 million pixels.
The screen could be straight, curved at the side or joined at the ends to make a full circle.