1. What is Throw Distance?

Throw distance is the distance between the projector lens and the screen. It's a critical measurement for proper projector placement and optimal image quality.

2. How Does the Calculator Work?

The calculator uses the throw distance formula:

Where:

• \( \text{Screen Width} \) — Width of the projection screen in feet
• \( \text{Throw Ratio} \) — Projector's throw ratio (dimensionless)

Explanation: The throw ratio is a specification provided by projector manufacturers that relates the width of the projected image to the distance from the projector to the screen.

3. Importance of Throw Distance Calculation

Details: Proper throw distance ensures the projected image fits the screen perfectly without distortion or loss of brightness. It's essential for both home theater and professional installations.

4. Using the Calculator

Tips: Enter screen width in feet and the projector's throw ratio (found in the projector's specifications). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find my projector's throw ratio?
A: The throw ratio is typically listed in the projector's specifications or user manual. It's often in the format of "1.5-2.0:1" for zoom lenses.

Q2: What's a typical throw ratio for Epson projectors?
A: Epson projectors typically have throw ratios between 1.0 and 2.1, depending on the model.

Q3: Does screen height affect throw distance?
A: No, the calculation is based on screen width. However, aspect ratio (16:9, 4:3, etc.) affects the relationship between width and height.

Q4: What if my projector has a zoom lens?
A: For zoom lenses, use the range of throw ratios to determine minimum and maximum throw distances.

Q5: How precise does the placement need to be?
A: While small variations are acceptable, being within ±10% of the calculated distance is recommended for optimal image quality.