This calculator helps photographers balance aperture, shutter speed, and ISO to achieve the correct exposure for any scene. It’s useful for planning shots in varying light conditions, from bright daylight to low-light interiors. Use it to quickly find equivalent exposure settings for creative control.
Exposure Triangle Calculator
Enter values and click Calculate to see exposure settings.
How to Use This Tool
Select your current aperture, shutter speed, and ISO from the dropdown menus. Choose what you want to adjust for—brightness, motion blur, or depth of field. Click Calculate to see how your settings affect the exposure triangle. Use Reset to clear all selections.
Formula and Logic
The exposure value (EV) is calculated using the formula: EV = log₂(aperture² / shutter speed) + log₂(ISO / 100). This tool uses standard photographic values to determine equivalent exposures and analyze creative effects like motion blur and depth of field.
Practical Notes
- Aperture controls depth of field: wider apertures (lower f-numbers) create shallow focus, while narrower apertures (higher f-numbers) keep more in focus.
- Shutter speed affects motion: faster speeds freeze action, slower speeds introduce blur—use a tripod for speeds below 1/60s.
- ISO adjusts sensitivity: higher ISO increases noise; aim for the lowest ISO that gives proper exposure.
- Consider lens crop factors (e.g., APS-C vs. full-frame) when comparing depth of field and field of view.
- Lighting intensity falls off with distance; account for this in indoor or low-light scenarios.
- Storage capacity: Higher resolution and RAW files use more space; plan accordingly for long shoots.
Why This Tool Is Useful
This calculator helps photographers quickly find balanced exposure settings without guesswork. It supports creative decisions like isolating subjects with shallow depth of field or freezing motion in sports photography. It's ideal for planning shots in changing light conditions.
Frequently Asked Questions
What if my camera doesn't support the selected aperture?
Most cameras support standard f-stops; if not, choose the closest available value and adjust ISO or shutter speed to compensate.
How does ISO affect image quality?
Higher ISO can introduce digital noise; use the lowest ISO possible for cleaner images, especially in well-lit conditions.
Can I use this for video settings?
Yes, but video often requires consistent shutter speeds (e.g., 1/50s for 24fps); adjust aperture and ISO accordingly to maintain exposure.
Additional Guidance
For advanced techniques, combine this tool with histogram analysis on your camera. Practice in different lighting to understand how the triangle interacts. Remember, there's no single "correct" exposure—creative intent matters most.