Field of view
calculator.
Pick a format and focal length to get the horizontal, vertical and diagonal angle of view — and exactly how much of the scene the lens covers at a given distance.
Sensor active area varies with recording mode and lens coverage — treat these as accurate for the listed dimensions and a reliable guide otherwise.
See the frame before you roll.
DOPro is a director's viewfinder with real framelines for your sensor, lens and aspect ratio. Set Math keeps field of view and fifteen more calculators in your pocket, free.
Field of view, answered.
How is angle of view calculated?
Angle of view = 2 × arctan(sensor dimension / (2 × focal length)). Use the
sensor width for horizontal, the height for vertical, the diagonal for diagonal.
How wide does a lens see at a distance?
Frame width = 2 × distance × tan(horizontal AoV / 2). A 24mm on full frame at
3 m covers roughly 4.5 m across.
Why does sensor format change field of view?
A larger sensor sees a wider angle at the same focal length — that's what crop factor describes. A 50mm frames tighter on Super 35 or APS-C than on full frame. For framelines on set, DOPro does it live.