Sunny 16 Background

Visual Estimation

Sunny 16

Calculate your base exposure without relying on any sensors. Master the classic Sunny 16 rule using intuitive visual weather scenarios.

The Origin

What is the Sunny 16 Rule?

Before digital sensors, photographers had to read the environment. The classic Sunny 16 rule is a proven analog formula that still works perfectly on modern digital cameras:

  • wb_sunny Bright Day: Start with an aperture of f/16.
  • shutter_speed Shutter Speed: Set it to the inverse of your ISO (e.g., ISO 100 = 1/125s).
  • calculate Sensorless: Digitizes that analog instinct to calculate base exposure anywhere.
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Weather Adaptable

Visual Scenarios

Light changes, and the math shifts with it. Estimate ambient light intuitively by selecting your current weather condition:

light_mode Sunny
cloud Cloudy
wb_twilight Sunset
ac_unit Snow
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Lighting Modifiers

Shadow Adjustments

Shooting under a harsh sun but your subject is in the shade? Apply built-in shadow compensation to perfectly expose the darker areas of your scene without losing your baseline reading.

Shadow Adjustments
Modern Gear

ND Filter Integration

Combine classic visual estimation with modern optical gear. Input your Neutral Density (ND) filter strength to instantly calculate the exact final exposure time needed.

ND Filter Integration

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