Lens calculator

Lenscalc is a more universal version of Edmund Optics' Focal Length Calculator.

Unlike the original version, lenscalc gives you the option to enter any set of parameters. Now you don't have to slightly adjust the surface radius to get your desired back focal length, you can just type it in. In the background there are the exact same equations.

mm
Surface 1 (object) power
mm
Surface 2 (image) power
mm
Lens power
Object space index
Lens index
Image space index
mm
Surface 1 (object) radius
mm
Surface 2 (image) radius
mm
Central thickness
mm
Primary principle point
mm
Secondary principle point
mm
Front (object) focal point
mm
Back (image) focal point
mm
Effective focal length
mm
Front focal length
mm
Back focal length
mm
Shift in nodal point