The Leko Lens Calculator helps determine the beam size and throw distance for stage lighting using Leko lens. This calculator is useful for lighting designers, technicians, and theater planners to plan effective lighting setups.

## Inputs:

**Lens Degree**: The degree of the Leko lens (e.g., 19°, 26°, 36°, 50°).**Throw Distance (feet)**: The distance from the light source to the target area (in feet).

## Formulas and Calculations:

## Beam Diameter Calculation:

The formula to calculate the beam diameter is:

[ \text{Beam Diameter} = 2 \times (\text{Throw Distance} \times \tan(\frac{\text{Lens Degree}}{2})) ]

## Example Calculation:

**Inputs**:

- Lens Degree: 26°
- Throw Distance: 30 feet

## Step-by-Step Calculation:

**Calculate Beam Diameter**:

- Using the formula:

[\text{Beam Diameter} = 2 \times (30 \times \tan(\frac{26}{2}))] - Simplify inside the parentheses:

[\tan(\frac{26}{2}) = \tan(13°) \approx 0.2309] - Multiply:

[30 \times 0.2309 \approx 6.927] - Multiply by 2:

[\text{Beam Diameter} = 2 \times 6.927 \approx 13.854 \, \text{feet}]

## Summary:

For a Leko lens with a degree of 26° and a throw distance of 30 feet, the beam diameter is approximately 13.854 feet.

## Conclusion:

The Leko Lens Calculator is a valuable tool for lighting designers and theater planners, helping them calculate the beam diameter for specific lens degrees and throw distances. This ensures accurate and effective lighting setups for various stage and event scenarios. By inputting the lens degree and throw distance, users can quickly determine the beam diameter, making it easier to plan and adjust their lighting designs.