Macro Photography Diffuser Spread Calculator

Optimize your lighting geometry. Calculate light spread, coverage, and softness based on your diffuser dimensions and working distance.

Configure Setup

Diffuser/Dome Diameter (mm)

Distance to Subject (mm)

Reference Focal Length (mm)

Not to scale

Spread Angle

0°

Coverage (Radius)

0 mm

Relative Softness Index

Moderate

100% Client-side Calculation | No cookies or persistent storage used.