Apps & Tools

Lens Field of View Simulator

Calculate horizontal, vertical, and diagonal FOV, with a live top-down view diagram.

Lens Settings

Focal Length

50mm

Sensor Size

Scene Distance (metres)

FOV Diagram — Top-Down View

Results

Crop Factor—

Full-Frame Equivalent—

Horizontal FOV—

Vertical FOV—

Diagonal FOV—

Frame Width at Scene Distance—

Frame Height at Scene Distance—

Lens Character—

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Knowledge Base

How to Use the Lens FOV Simulator

The Lens Field of View Simulator shows how different focal lengths appear on different camera sensors (full-frame, APS-C, etc.). Input focal length and sensor size to see the field of view in degrees. Critical for pre-production planning and understanding lens equivalence across cameras.

Understanding Focal Length & FOV

Focal length (measured in millimeters) determines how much of the scene you see. 24mm is ultra-wide. 200mm is zoomed in. The same focal length appears different on different sensor sizes.

Sensor Size Matters

Full-Frame (35mm): Standard reference. 50mm is "normal" (human eye FOV).
APS-C (crop sensor): 1.5x crop factor. 35mm on APS-C looks like 52mm on full-frame.
Micro 4/3: 2x crop factor. 25mm on MFT looks like 50mm on full-frame.
Phone: Tiny sensor. Wide angle lenses (24mm equivalent) look even wider.

Choosing Lenses

Wide angle (24-35mm): Landscapes, establishing shots, environmental storytelling. Creates distance and drama.
Normal (50mm): Close-ups, interviews, matches human perspective.
Telephoto (70-200mm): Compression effect, background blur, isolates subjects. Doesn't flatten faces like wide angles do.

FAQ

Q: Is a full-frame camera better than APS-C?
A: Not necessarily. APS-C cameras are smaller, cheaper, and more portable. The 1.5x crop can be an advantage for telephoto work.

Q: What focal length looks most cinematic?
A: 35mm and 50mm are considered cinematic. Avoid extreme wide angles (which distort) and extreme zooms (which feel surveillance-like).