Throw ratio
Distance from the lens to the image divided by the image width.
A 2:1 throw ratio means a 10 m wide image needs 20 m of distance. Zoom lenses have a range (e.g. 1.4–2.2:1). Use our throw-distance calculator to plan positions.
Related terms
- Throw distanceThe distance between the projector lens and the projection surface.
- Short-throw lensA lens with a throw ratio below about 1:1, for large images from short distances.
- Zoom lensA lens with an adjustable throw ratio range.
Put it into practice: throw-distance calculator · lumens calculator · intro to projection mapping