1. What is Field of View (FOV)?

The Field of View (FOV) is the extent of the observable world that is seen at any given moment through a camera lens. It determines how much of the scene will be captured in the frame and is typically measured in degrees.

2. How Does the Calculator Work?

The calculator uses the FOV formula:

Where:

• \( \text{sensor\_height} \) — Vertical size of the camera sensor (in millimeters)
• \( \text{focal\_length} \) — Lens focal length (in millimeters)

Explanation: The formula calculates the angular field of view based on the ratio between the sensor size and the focal length of the lens.

3. Importance of FOV Calculation

Details: Knowing the FOV helps videographers and cinematographers choose the right lens for their shot, plan camera placement, and understand how much of the scene will be visible in the frame.

4. Using the Calculator

Tips: Enter the sensor height in millimeters (common values: 4.8mm for 1/3" sensor, 7.2mm for 1/2" sensor) and the lens focal length in millimeters. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between horizontal and vertical FOV?
A: This calculator gives vertical FOV. Horizontal FOV would use sensor width instead of height and is typically wider.

Q2: How does sensor size affect FOV?
A: Larger sensors with the same focal length will have a wider field of view. Smaller sensors will have a narrower field of view.

Q3: What are typical FOV ranges?
A: Wide-angle lenses might have 60-100° FOV, normal lenses about 40-50°, and telephoto lenses 10-30°.

Q4: Does this work for zoom lenses?
A: Yes, but you need to input the specific focal length you're using at that zoom setting.

Q5: How does crop factor affect FOV?
A: Crop factor effectively makes the FOV narrower by multiplying the focal length in the calculation.