1. What is Exposure Value?

Exposure Value (EV) is a number that represents the combination of a camera's shutter speed and f-number (aperture), adjusted for ISO sensitivity. It provides a standardized way to discuss exposure settings across different camera systems.

2. How Does the Calculator Work?

The calculator uses the exposure equation:

Where:

• \( Aperture \) — f-number (e.g., f/2.8)
• \( Shutter\ Speed \) — Duration in seconds (e.g., 1/125 = 0.008)
• \( ISO \) — Film/sensor sensitivity (e.g., 400)

Explanation: The equation calculates how much light reaches the camera sensor based on these three fundamental exposure parameters.

3. Importance of Proper Exposure

Details: Correct exposure is essential for capturing images with good detail in both shadows and highlights. The EV scale helps photographers maintain consistent exposure when changing settings.

4. Using the Calculator

Tips: Enter aperture as f-number (without the f/), shutter speed in seconds (1/125 = 0.008), and ISO value. EV=0 represents standard exposure at ISO 100.

5. Frequently Asked Questions (FAQ)

Q1: What is a "stop" in photography?
A: A stop is a doubling or halving of light. Each whole EV number represents a 1-stop difference in exposure.

Q2: What EV is considered "proper" exposure?
A: EV 0 at ISO 100 is standard, but creative photography often uses higher or lower values intentionally.

Q3: How do I use EV for exposure compensation?
A: If your meter suggests EV 12 but you want 1 stop brighter, adjust settings to achieve EV 11.

Q4: Why does ISO affect exposure value?
A: Higher ISO makes the sensor more light-sensitive, effectively increasing exposure without changing aperture/shutter.

Q5: Can I use this for film photography?
A: Yes, the EV system works the same for both digital and film cameras.