Camera Field of View Calculator
Calculate camera field of view from sensor dimensions and focal length to see horizontal, vertical, and diagonal angle of view plus scene coverage at any distance. This camera FOV calculator supports full-frame, APS-C, Micro Four Thirds, and phone sensor presets for fast lens comparisons.
Camera Field of View Calculator
Used for 35mm equivalent focal length only; FOV uses your actual sensor and lens.
Reverse-calculates the focal length needed for your desired angle of view.
Results
Enter Sensor Size and Focal Length
Start with a sensor preset or type width and height in millimeters. Enter the actual focal length of your lens—not the zoom ring marketing label if it differs from specifications. Crop factor adjusts for cameras that use a smaller portion of the image circle.
Subject distance helps translate angular FOV into meters or feet of coverage, which is essential for studio setups, real estate photography, and event planning where you need to know how wide a group will fit.
Horizontal, Vertical, and Diagonal Camera FOV
Horizontal angle of view is the most cited spec on lens datasheets. Vertical FOV matters for portrait orientation and video formats. Diagonal FOV summarizes the full frame corner-to-corner and is useful when comparing lenses across different aspect ratios.
All three values derive from the same arctangent relationship between sensor dimension and focal length. Changing focal length linearly affects FOV—halving focal length roughly doubles the angle.
Lens Field of View Explained
A lens field of view calculator answers how much of a scene a given focal length captures on a specific sensor. Wide-angle lenses shorten focal length relative to sensor size, increasing FOV. Telephoto lenses narrow the cone of light reaching the sensor.
This lens FOV calculator also shows 35mm equivalent focal length so you can compare crop-sensor setups to full-frame references used in photography forums and lens reviews.
Angle of View Camera Examples
A 50mm lens on full-frame (36×24 mm) delivers about 40° horizontal FOV—similar to normal human perspective. A 24mm wide-angle pushes beyond 70° horizontal. Use these benchmarks to sanity-check calculator output against lenses you already own.
For a fov to focal length calculator workflow, note the horizontal FOV you need for a subject width at distance, then adjust focal length until coverage matches. Security and landscape planners use the same loop when choosing lenses.
Webcam and Phone Camera FOV
Modern phone main cameras often sit near 70–80° horizontal with equivalent focal lengths around 24–26mm on full-frame scale—search iphone camera fov specs for your model and compare here using the phone preset. The Logitech C920 reports roughly 78° diagonal (about 70° horizontal), which matches the c920 field of view commonly cited in streaming guides.
Fisheye lenses exceed 180° and break rectilinear assumptions—this calculator assumes straight-line projection, so fisheye fov values from manufacturers may look wider than calculated rectilinear equivalents.
Common Calculation Mistakes
Mixing up sensor diagonal with width is the most frequent error. Always use the correct axis for horizontal versus vertical FOV. Another pitfall is ignoring crop factor on APS-C bodies, which makes a 35mm lens behave like 50mm full-frame equivalent with narrower FOV.
For surveillance overlap, pair results with the security camera FOV calculator which adds mounting height and target width recommendations. Use the vertical FOV converter when a video spec lists vertical instead of horizontal angle.
Frequently Asked Questions
Divide sensor width by twice the focal length, take arctan, multiply by two, and convert to degrees for horizontal FOV. Repeat with sensor height for vertical FOV. Our calculator handles crop factor and outputs diagonal FOV and coverage at distance automatically.
Lens angle of view is the angular extent of the scene a lens projects onto the sensor, measured in degrees. It depends on both focal length and sensor size—the same lens on a smaller sensor yields a narrower angle because the sensor captures a smaller portion of the image circle.
iPhone main cameras typically offer roughly 70–77° horizontal FOV depending on model and crop applied in video modes. Select the iPhone preset in the calculator or check Apple's camera specifications and enter the stated sensor dimensions for precise results.
No. Higher focal length means narrower FOV and more magnification. Lower focal length widens the angle. Telephoto lenses above 85mm on full-frame often drop below 30° horizontal, while ultra-wide lenses exceed 90°.