It allows us to compress the distance between the projector and the screen.

这样我们就可以把投影设备和投影屏幕的距离拉近。

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The size of the image can be adjusted simply by modifying the distance between the projector and the projection surface; the resulting image remains uniformly clear.

通过改变投影仪和投影片表面的距离，图像大小也能做简单的调整，调整后的画面仍然保持清晰。

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Another advantage is that the pictures the overhead projector shows are large and bright owing to the short distance between the projector and the screen.

投影仪的另一个优点在于它投出的影像大而明亮，这是由于投影仪和银幕之间距离较近的缘故。

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We started out by taking photos of a still projected image of some foliage, from a distance of around two feet from the screen -- by which time the light from the projector had had quite a journey.

ENGADGET: This is what native 4K home cinema looks like on Sony's VPL-VW1000ES projector