FOV Calculator

Calculate camera field of view (FOV) based on sensor dimensions, focal length, and subject distance.

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This Field of View (FOV) Calculator helps photographers, videographers, and cinematographers determine the exact viewing angle of their camera setup. By inputting sensor dimensions (width and height in mm), focal length (in mm), and subject distance (in meters or feet), the tool calculates horizontal, vertical, and diagonal field of view angles in degrees. It also provides the actual subject coverage width and height at the specified distance. The calculator supports common aspect ratios (4:3, 3:2, 16:9) and custom sensor sizes for precise calculations.

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Enter sensor width and height in millimeters (or select a preset aspect ratio)
Input focal length in millimeters
Specify subject distance in your preferred unit (meters or feet)
Click 'Calculate FOV' to see horizontal, vertical, and diagonal field of view angles
View the actual subject coverage dimensions at the specified distance

Frequently Asked Questions

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What is Field of View (FOV) in photography?

Field of View (FOV) is the extent of the scene that a camera can capture, measured as an angle in degrees. It determines how much of the scene will be visible in your photo or video.

How do I find my camera's sensor size?

Sensor size is typically listed in your camera's specifications as dimensions in millimeters (e.g., 36mm × 24mm for full-frame). You can also look up your camera model online or use common presets like APS-C (22.2mm × 14.8mm) or Micro Four Thirds (17.3mm × 13mm).

Can I calculate FOV for different distance units?

Yes, the calculator allows you to input distance in either meters or feet. Simply select your preferred unit before entering the distance value.

What's the difference between horizontal, vertical, and diagonal FOV?

Horizontal FOV measures the angle across the width of the frame, vertical FOV measures the angle across the height, and diagonal FOV measures from corner to corner. Diagonal FOV is typically the largest value.

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