PhysRefPhysics reference
Optics
Optics

Lens Power

P=1fP = \frac{1}{f}

The power of a lens in diopters is the reciprocal of focal length in meters.

Variables

P
Power
D (diopters)
f
Focal length
m

Your notes

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Common questions

What is the Lens Power formula?

Lens Power is written P = 1/f. The power of a lens in diopters is the reciprocal of focal length in meters. It belongs to Optics, under Lenses.

What are the units in P = 1/f?

In SI units, P is power, measured in D (diopters); f is focal length, measured in m.