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Lens Selection Calculator

Calculate required lens focal length.

Horizontal measurement perpendicular to length.
ft
Linear measurement between two points.
ft
Horizontal measurement perpendicular to length.
mm

Results

Required Focal Length:
Calculated required focal length based on your inputs.
-mm
Horizontal FOV:
Calculated horizontal fov based on your inputs.
-degrees
Standard Lens:
Calculated standard lens based on your inputs.
-mm
Reference: ASIS/UL Standards. Lens focal length selection.