What does this system need to work?
Labs / General Knowledge
How Cameras See
A camera lens bends rays of light so they meet on a sensor. Focus moves the lens relationship, while the aperture controls how much light enters and how much of the scene looks sharp.
Labs / General Knowledge / How Cameras See
How Cameras See
A camera lens bends rays of light so they meet on a sensor. Focus moves the lens relationship, while the aperture controls how much light enters and how much of the scene looks sharp.
Why it matters
Why explore this?
Everyday objects can seem mysterious until we separate them into simple parts. This model lets you change one factor and see how the whole system responds.
Explore
Try the model
100% sharp
A smaller aperture keeps more of the scene acceptably sharp.
Investigate
Questions to test
Predict first, try it in the model, then use what you observe to answer.
What to try
- Move focus away from the subject distance. What happens to sharpness?
- Compare a wide and narrow aperture. How does the sharp region change?
- Can a smaller aperture partly rescue imperfect focus?
- Why might a portrait use a wide aperture while a landscape uses a narrow one?
Explain
Make sense of what happened
Describe the system as a simple chain: what goes in, what changes inside, and what comes out. Use one observation from the model as evidence.
Check
Before you leave
Which change had the biggest effect?
How would you explain it to someone else?
If you can answer all three using evidence from the model, you understand the main idea. If not, return to Explore and change one setting at a time.