Projector throw

Where to put a projector, how big the image.

What it does

Where to put a projector for the image you want, or how big the image will be from where it stands.

Throw ratio: in the projector’s specifications (for example 1.39–2.09:1). It is the distance divided by the image width. A zoom lens has two: type both to get a range. A short-throw projector is around 0.5.
The distance is measured from the lens to the screen.
Lens shift moves the image up, down or sideways without moving the projector: it does not change the distance.

Free, no account, nothing is sent: it runs in your browser, even offline.

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