Lenses & focus / Learn by doing
Focus explained simply
What is “Focus”?
Adjusting the lens so the chosen subject distance looks sharp on the sensor.
- 01In front
- 02On the subject
- 03Behind
How do you use Focus practically?
A small exercise
Photograph a product label and deliberately focus in front of it, on it and behind it. Compare the lettering.
- 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 Focus solve a problem?
Choosing focus tells the viewer which detail matters and makes important information readable.
What can go wrong?
Sharpness also depends on movement, lens performance and processing. Correct focus alone does not guarantee a crisp frame.
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?
In front → On the subject → Behind. 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
Autofocus lesson — 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.