Exposure / Learn by doing
Aperture explained simply
What is “Aperture”?
The adjustable opening inside a lens. Like a window, it can let in more or less light. A smaller f-number means a wider opening.
- 01f/2.8: wider opening
- 02f/8: narrower opening
- 03Compare the background
How do you use Aperture practically?
A small exercise
Photograph three toys in a row at f/2.8 and f/8. Keep focus on the middle toy and adjust shutter speed to keep brightness similar.
- Make a starting version and keep it so you can compare fairly.
- Try the change in the exercise. Keep unrelated choices steady where the exercise allows.
- Compare the result at the size your viewer will actually see. Write down what changed and whether it helped.
How does Aperture solve a problem?
A distracting background can become less sharp with a wider aperture. A smaller opening can help keep a group clearer.
What can go wrong?
A wider aperture does not automatically make a better photograph. Very shallow focus can leave an eye or product edge soft.
How do you turn the idea into a useful solution?
Start with the specific problem in your image or brief, try the exercise, and keep the version that meets that need. If the result is worse, return to the starting version and change one choice at a time.
Quick check: can you explain the three ideas in the diagram?
f/2.8: wider opening → f/8: narrower opening → Compare the background. Explain how each relates to the exercise. Then compare the starting version with your result and choose the one that meets your brief.
Related video lesson
Exposure controls — Canon
This related lesson gives wider context for the topic. Camera menus and software versions may differ from yours.
Loading the player connects to YouTube. You can also watch the lesson on YouTube.Keep exploring
Try the idea in a studio shoot
Planning a portrait or product session? Use the glossary with our practical shoot guides, then check the studio facilities and send your confirmed requirements with an availability enquiry.