Lenses & focus / Learn by doing
Continuous Autofocus explained simply
What is “Continuous Autofocus”?
An autofocus mode that keeps updating focus while the focus command is active. It is often called AF-C or Servo.
- 01Subject moves
- 02Focus updates
- 03Check the sequence
How do you use Continuous Autofocus practically?
A small exercise
Photograph someone walking slowly towards the camera. Keep the focus command active and inspect a short sequence.
- 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 Continuous Autofocus solve a problem?
It helps maintain focus when the distance between camera and subject keeps changing.
What can go wrong?
Tracking is not perfect. Choose a suitable focus area, enough shutter speed and a clear subject.
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?
Subject moves → Focus updates → Check the sequence. 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.