05/16/2026
FRIDAY FUNDAMENTALS
Exposure Triangle
Today’s post is more of a recap than a brand-new lesson. Let’s talk about the Exposure Triangle.
The Exposure Triangle refers to the three main settings that control how light hits your camera’s sensor: aperture, shutter speed, and ISO. These settings are all connected—when you change one, you’ll usually need to adjust the others to maintain proper exposure.
Here’s a quick breakdown:
1. Aperture
Definition: The size of the lens opening that lets light into the camera.
Effect on exposure: A wider aperture (smaller f-number like f/2.8) lets in more light, making your image brighter. A narrower aperture (larger f-number like f/16) lets in less light, making it darker.
Aperture also affects depth of field—wider apertures blur the background, while narrower apertures keep more of the scene in focus.
2. Shutter Speed
Definition: The amount of time the shutter stays open, allowing light to hit the sensor.
Effect on exposure: A slower shutter speed (like 1/30) lets in more light, brightening the image. A faster shutter speed (like 1/1000) lets in less light, darkening it.
Shutter speed also controls motion—slower speeds create motion blur, while faster speeds freeze action.
3. ISO
Definition: The sensitivity of your camera’s sensor to light.
Effect on exposure: A higher ISO (like 1600) increases brightness, while a lower ISO (like 100) results in a darker image.
Higher ISO can also introduce noise (grain) into your photos.
The real key is how these three work together. Think of it as a balancing act—if you change one setting, you’ll need to adjust the others to maintain the same exposure.
For example:
• Opening your aperture to blur the background may require a faster shutter speed to avoid overexposure.
• Slowing your shutter speed to capture motion blur might mean lowering your ISO or narrowing your aperture.
This concept is especially useful when shooting with a DSLR or mirrorless camera, where you have full control over your settings. Smartphones can be more limited, but understanding this still helps you make better creative choices. Have fun playing around with the Exposure Triangle and, as always, keep it Wildly Real. 📸❤️
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