Plan camera coverage angles and evaluate comparative optical framing distributions directly in your browser. Selecting appropriate lens focal lengths for machine vision, photography, and security surveillance requires balancing sensor dimensions against target distances to achieve the required scene coverage.

This optical sizing utility models angular framing ratios using three optical parameters: Primary Dimension (val1, representing active sensor dimension or focal plane width), Operating Coefficient (val2, representing focal length factor or distance coefficient), and System Loss Factor (val3, representing geometric crop factor or peripheral vignetting margin). The calculation determines the primary proportional field index using (val1 × val2) / val3, the secondary geometric mean index via √(val1 × val2), and the angular distribution share as (val1 / (val1 + val2)) × 100.

For example, with a sensor baseline of 100, a focal distance coefficient of 20, and a loss offset of 5, the primary optical coverage index evaluates to (100 × 20) / 5 = 400.00, the geometric mean index yields √(2000) ≈ 44.72, and the proportional framing share calculates to (100 / 120) × 100 ≈ 83.33%.

All optical calculations execute locally in your web browser. No camera specifications, focal values, or installation dimensions leave your device.