Use this cinematography or projection calculation to plan image geometry, exposure, timing, storage, film footage, or presentation from explicitly stated camera and display parameters.

Sensor Width Millimeters (mm)

Required number input.

Horizontal Angle Degrees (°)

Required number input.

Focal length from sensor width and horizontal angle of view under a rectilinear thin-lens model. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Focal Length Millimeters (mm)

The resulting focal length millimeters returned as a number.

• Angle-of-view and equivalent-focal-length calculations use nominal sensor or film dimensions and an ideal rectilinear lens. Focus breathing, distortion, image-circle cropping, stabilization, anamorphic optics, and manufacturer crop conventions can change the captured field.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Confirm critical values with the actual camera, lens, codec, projector, and delivery specification, then run a camera or projection test under representative conditions.

• Field Of View From Focal Length

  Horizontal angle of view of a rectilinear lens from sensor width and focal length; excludes distortion.

• Angle Of View Diagonal

  Diagonal angle of view for a rectilinear lens from sensor diagonal and focal length.

• Depth Of Field

  Finite depth of field from focal length, f-number, circle of confusion and focus distance using thin-lens near/far limits.