How Throw Ratio Helps You Achieve the Ideal Screen Size?
Projecting a large enough display at home requires a suitable throw distance between the screen and the projector. So what determines this distance? The short answer is throw ratio. For a quick reference, the chart below provides various screen sizes with the appropriate throw distance needed to achieve them with an XGIMI projector. (Product models include HORIZON series, Halo series, MoGo series, and Elfin)
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What is Throw Ratio and Throw Distance?
Throw distance is the distance from the tip of the projector’s lens to the screen.
This distance determines where the projector will sit in your classroom relative to the projection screen. For any given projector, the width of the image (W) relative to the throw distance (D) is known as the throw ratio D/W.
Throw ratio is the relation between the throw distance (the distance between the projector’s lens and the projected image) and the width of the projected image:
Throw Ratio = Throw Distance / Image Width
The throw ratio tells us what image size we can project from a certain distance away. Let’s say you’re setting up an XGIMI projector in your living room that has a throw ratio of 1.2:1, and you’re using a screen 10ft in width. How far away should the projector be positioned from the screen? Let’s do the math and find out!
Take the width of the screen and multiply it by the first number in the throw ratio. So, screen width x throw ratio = throw distance. For the example above, it should look like this: 10ft (screen width) x 1.2 (first number in the throw ratio) = 12ft
According to this equation, if you place your projector 12ft away, the picture will perfectly fit the proportions of the screen with only minor adjustments to the lens’ zoom needed afterward.
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