FocusHaus by G

15/04/2026

What is ISO? 📸

04/04/2026

"Exposure Triangle"—the three pillars of photography that determine how an image looks. Whether you’re shooting a school event or professional portraits, mastering these settings is key to getting the perfect shot.
Here is a breakdown of what this graphic covers:
1. Aperture (Depth of Field)
Aperture controls the opening of the lens.
• Lower numbers (f/1.4): Create a "shallow depth of field," which blurs the background and makes your subject pop. This is perfect for professional headshots.
• Higher numbers (f/11): Keep more of the scene in focus, which is ideal for group photos or landscapes.
2. Shutter Speed (Motion)
This determines how long the camera’s sensor is exposed to light.
• Fast speeds (1/500): Freeze movement, capturing sharp details of someone walking or a student during a performance.
• Slow speeds (1/2): Create "motion blur," which can add a sense of speed or artistic flair to moving subjects.
3. ISO (Light Sensitivity & Grain)
ISO measures the sensor’s sensitivity to light.
• Low ISO (100): Produces the cleanest, crispest images with "less grain." Best for outdoor shots or well-lit rooms.
• High ISO: Increases brightness in dark environments but introduces "noise" or graininess to the photo.
The Golden Rule: "Brighter"
Notice the inner arrows on the triangle. To get a brighter photo, you can:
• Open the Aperture (Move toward f/1.4).
• Slow the Shutter (Move toward 1/2).
• Increase the ISO.

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