Angle of view calculator
Turn a lens’s focal length into its angle of view and 35 mm equivalent, for your camera’s sensor.
That's about the same as a normal lens.
What it means
How wide does it see?
Angles are for a rectilinear lens focused at infinity on a 3:2 frame. Fisheye lenses and close focusing change them.
Every unit
Your lens in every unit
Learn
Three things worth knowing
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50 mm sees about 47°
On full frame, 24 mm covers 84° across the diagonal, 50 mm about 47° and 200 mm about 12°. Halve the focal length and the view roughly doubles.
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Why 35 mm
The 36 × 24 mm frame of 35 mm film was the most common camera format for most of the 20th century, so its focal lengths became the language photographers think in.
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A crop factor is not zoom
A 50 mm lens on APS-C frames like a 75 mm, but it is still a 50 mm lens: perspective and background blur behave differently from a real 75 mm.
Shortcuts
Popular focal length conversions
Background
About angle of view
The focal length printed on a lens only tells you how wide it sees once you know the sensor behind it. A smaller sensor crops the middle of the picture, so the same lens looks longer.
Photographers compare lenses by their 35 mm equivalent: the focal length that would give the same view on a full-frame camera. Multiply by the sensor’s crop factor to get it.