Ai Focus Vs Ai Servo: Key Differences

When it comes to autofocusing on your subject, you have two main options: AI Focus and AI Servo. Both have their own strengths and weaknesses, so which one you choose will depend on your needs. Here’s a brief overview of each option to help you make a decision.

AI Focus is best for stationary subjects or when you know exactly when you want to take the photo. It locks onto the subject and tracks it, so if the subject moves, the focus will still be accurate. However, this can also be a disadvantage if your subject is moving because you may not be able to take the photo at the precise moment you want.

AI Servo is ideal for moving subjects since it continuously adjusts the focus as needed. This means that even if your subject moves around, you’ll still get a sharp image. However, it can be more difficult to use than AI Focus because you need to keep an eye on your subject’s movement and anticipate when they’ll be in the right position for the shot.

AI Focus versus AI Servo (Canon) – difference, why, when, how to use it

When it comes to deciding between Ai Focus and Ai Servo, there are a few key things to keep in mind. First, think about what kind of photography you typically shoot. If you mostly shoot fast-moving subjects, like sports or wildlife, then Ai Servo will be the better option.

This setting continuously adjusts focus as your subject moves, so you can keep them in sharp focus even if they’re constantly on the move. On the other hand, if you tend to shoot slower-moving subjects or static scenes, then Ai Focus will likely be a better choice. This setting only adjusts focus once when you half-press the shutter release button, so it’s less likely to hunt for focus and miss your shot altogether.

Ultimately, it’s up to you to decide which autofocus mode is best for your needs. But if you’re not sure where to start, we recommend trying out both modes and seeing which one gives you the best results in your specific shooting situations.

Ai Focus Vs Ai Servo for Portraits

In portrait photography, one of the most important choices you have to make is deciding which autofocus mode to use. There are three main autofocus modes on most cameras: single point autofocus (AF), continuous autofocus (AI Servo), and automatic selection AF (Ai Focus). So, which one should you use when taking portraits?

The answer depends on a few factors, such as what kind of subject you’re photographing and how active they are. If your subject is relatively still, then single point AF or automatic selection AF will probably work just fine. However, if your subject is moving around a lot, then you’ll need to use continuous autofocus (AI Servo) to make sure they stay in focus.

Here’s a quick rundown of each autofocus mode and when you might want to use them: Single Point AF: This is the simplest form of autofocusing. You simply choose one focus point and the camera will focus on whatever is under that point.

This works well for stationary subjects, but can be tricky if your subject starts moving around. Continuous Autofocus: Also known as AI Servo in Canon cameras and AF-C in Nikon cameras, this mode tracks moving subjects and keeps them in focus even if they’re constantly changing position. This is the best mode to use if your subject is in motion.

Automatic Selection AF: This mode lets the camera choose the best focus point automatically. It’s great for quickly changing situations where your subject might move around unpredictably. However, it can sometimes result in less precise focusing than using single point AF or continuous autofocus modes.

Ai Focus Vs Ai Servo


What Does Ai Servo Mean?

In simple terms, AI Servo is a focus mode on Canon cameras that uses predictive focusing. The camera constantly adjusts the focus to keep the subject in focus as it moves. This is in contrast to other modes like One Shot which only takes one photo at a time with the current focus setting.

AI Servo is best used for moving subjects or when you are tracking a subject and want to keep them in focus. For example, if you are photographing a bird in flight, AI Servo will continuously adjust the focus to keep the bird sharp as it moves around.

What is Al Focus?

In optics, an achromatic doublet or achromat is a type of lens composed of two individual lenses made from materials with different dispersion coefficients. The lenses are mounted next to each other in a frame so that their optical axes are parallel. They are designed such that the chromatic aberration of one is counteracted by the other, resulting in an image with little color fringing.

Achromatic doublets are commonly used in photographic objectives and simple telescope objectives. They are also used as eyepieces in some inexpensive binoculars and spotting scopes.

What Does Ai Servo Mean on Canon?

AI Servo is a focusing mode found on Canon cameras. When AI Servo is selected, the camera will continue to adjust focus as the subject moves, making it ideal for tracking moving subjects. The camera will also predict where the subject will move and pre-focus on that area to try and keep the subject in focus.

Does Ai Servo Work With Back Button Focus?

Yes, AI Servo does work with back button focus. This is a feature that allows the camera to continue to adjust focus even when the shutter release is not pressed. This can be helpful when shooting moving subjects or when trying to keep a moving subject in focus while also composing the shot.


When it comes to autofocusing on your camera, you have two main options: AI Focus and AI Servo. Both of these methods have their own strengths and weaknesses, so it’s important to understand the difference between them before deciding which one to use. AI Focus is best for stationary subjects or when you know exactly when you want to take the photo.

It will lock in on the subject and track it if it moves, but won’t continue tracking after the photo is taken. This makes it ideal for taking photos of animals or people who are unlikely to move much. AI Servo, on the other hand, is better for moving subjects.

It continuously tracks the subject as long as the shutter button is half-pressed, meaning that you’re more likely to get a sharp photo even if the subject is moving around. This makes it ideal for sports photography or any other situation where your subject might be in motion.

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