For sports and action, choose continuous AF, because it keeps refocusing on a subject that is moving toward, away from or across the frame. Single AF locks focus once and holds it, which suits subjects that stay put or moments when you can focus, recompose and shoot.
How Each Mode Works
Single AF, often labeled AF-S or One-Shot, focuses when you half-press the shutter button and then stays locked until you release it. Continuous AF, often labeled AF-C or AI Servo, keeps adjusting focus for as long as you hold the button down.
Camera makers use different names and menus, so check your manual for the exact labels and options on your model.
Why Continuous AF Suits Action
- Runners, cyclists, footballers and dancers change distance constantly, so a locked focus point goes out of date within moments.
- Continuous AF predicts movement, which helps with subjects moving at a steady pace toward you.
- Many cameras pair it with subject tracking that follows a face, body or vehicle around the frame.
- It reduces missed shots from the focus lag you get when you have to refocus manually between frames.
When Single AF Still Makes Sense
- Posed team photos and portraits before a game.
- Static moments such as a golfer setting up, a pitcher on the mound or a gymnast waiting.
- Pre-focusing on a spot, like a finish line or a goal, and waiting for the subject to arrive.
- Low light scenes where hunting would otherwise annoy you, though continuous AF is still usually the better choice for movement.
Settings to Try
These are general values to try. Adjust to the sport, the lens and the light.
- Set the focus mode to continuous AF.
- Choose a tracking or zone focus area rather than a single point, so the camera can follow erratic movement.
- Use a shutter speed of roughly 1/500 and faster to freeze most movement, and 1/1000 or higher for very fast subjects.
- Set a high burst rate, and shoot in short bursts instead of holding the button down constantly.
- Use back-button focus if your camera supports it, so you can switch between locking and tracking with your thumb.
- Raise ISO as needed rather than lowering the shutter speed.
Quick Decision Table
| Situation | Mode to choose |
|---|---|
| Player running toward you | Continuous AF |
| Posed group photo | Single AF |
| Waiting at a fixed spot | Single AF, then recompose |
| Unpredictable play | Continuous AF with tracking |
FAQ
Does continuous AF drain the battery faster?
It can, since the lens motor works constantly. Carry a spare battery for long events.
Can I use continuous AF for portraits?
Yes, particularly with children or pets that move around, though single AF is fine for still subjects.
The Short Version
Use continuous AF for anything that moves, ideally with tracking and a fast shutter speed. Keep single AF for still moments and pre-focused spots, and learn your own camera’s mode names.
