What Is a Long Throw Ratio Projector and When Should You Use One?

06/06/2025

Choosing the right projector for your space can be challenging, especially with so many technical terms like throw ratio floating around. One term that often comes up is the long throw ratio projector. But what exactly does that mean, and when is it the best choice for your needs? This blog will break down what a long throw ratio projector is, how it differs from other types, and the ideal scenarios where it excels.

What Is a Long Throw Ratio Projector?

A long throw ratio projector refers to a projector designed to be placed far away from the screen to produce a large image. The throw ratio itself is calculated by dividing the distance from the projector to the screen by the width of the projected image.

For example, if your projector is 20 feet from the screen and the image width is 10 feet, the throw ratio is:

20 ÷ 10 = 2.0

This ratio of 2.0 indicates a long throw projector, meaning it requires a longer distance to produce a certain image size compared to short throw or ultra-short throw projectors.

How Is a Long Throw Ratio Projector Different?

Placement Distance: Long throw projectors are typically installed 10 feet or more from the screen.
Image Size: Because of the greater distance, they can project large images suitable for auditoriums, large classrooms, or event spaces.
Lens Design: These projectors use lenses optimized for long-distance projection, which helps maintain image sharpness over large distances.
Mounting: Usually ceiling-mounted or placed at the back of a room, away from the audience.

When Should You Use a Long Throw Ratio Projector?

1. Large Venues and Auditoriums

If you have a big room where the projector needs to be far from the screen—such as in a theater, auditorium, or large conference hall—a long throw ratio projector is essential to fill the screen properly.

2. Outdoor Movie Nights

For open-air settings where the projector must be positioned at a distance, long throw projectors offer bright, clear images that cover large screens.

3. Churches and Houses of Worship

These spaces often require large-scale projection from a distance to accommodate congregations, making long throw projectors ideal.

4. Large Corporate Meeting Rooms

When presentations need to be viewed by many attendees from the back of a room, a long throw ratio projector ensures everyone sees a crisp, large image.

Advantages of a Long Throw Ratio Projector

Large Image Projection: Perfect for big screens and wide viewing angles.
Reduced Shadows and Obstructions: Since the projector is farther away, fewer shadows are cast by people moving near the screen.
Better Heat Management: Positioned away from the audience, the projector generates less noise and heat in the seating area.

Considerations Before Choosing a Long Throw Ratio Projector

Room Size: Ensure your room is large enough to accommodate the necessary throw distance.
Installation: Requires proper mounting and alignment to avoid image distortion.
Cost: Often more expensive than short throw models due to lens complexity and brightness.
Ambient Light: Brightness (lumens) is critical—long throw projectors for large venues typically have higher lumens ratings to combat ambient light.

Conclusion

A long throw ratio projector is the perfect solution when you need to project large images from a considerable distance. Whether you're setting up in a spacious auditorium, an outdoor venue, or a large meeting room, understanding the throw ratio helps you choose the right projector that fits your environment.

If you're unsure whether a long throw ratio projector suits your needs, consider your room size, screen dimensions, and how far the projector can be installed from the screen. Using these factors ensures you get the best image quality and viewing experience.