1. What is Throw Distance?

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

2. How Does the Calculator Work?

The calculator uses the throw distance formula:

Where:

• \( \text{throw\_distance} \) — Distance from projector to screen (feet)
• \( \text{screen\_width} \) — Width of the projection screen (feet)
• \( \text{throw\_ratio} \) — Projector's throw ratio (dimensionless)

Explanation: The throw ratio is a specification provided by projector manufacturers that relates image width to projection distance.

3. Importance of Throw Distance Calculation

Details: Proper throw distance ensures the projected image fits perfectly on your screen, maintains focus, and delivers optimal brightness and clarity.

4. Using the Calculator

Tips: Measure your screen width in feet and find your projector's throw ratio in its specifications. Enter both values to calculate the ideal projection distance.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find my projector's throw ratio?
A: Check your projector's manual or specifications sheet. It's often listed as a single number or a range (e.g., 1.15-1.5).

Q2: What if my projector has a zoom lens?
A: Projectors with zoom lenses have a throw ratio range. You'll get a range of possible throw distances - calculate both minimum and maximum.

Q3: Does screen height affect throw distance?
A: No, the calculation is based on screen width. However, screen height is proportional to width based on aspect ratio (typically 16:9).

Q4: Can I use this calculator for any brand projector?
A: While designed for BenQ projectors, the formula works for any brand as long as you have the correct throw ratio.

Q5: What about ultra-short throw projectors?
A: Ultra-short throw projectors use different calculations as they're designed to be placed very close to the screen.