There is much more to focus on many novice photographers. When they fly into it, it may look complicated. However, once you find your way around your camera, it is easy to master.
There is a lot of it, so I have divided the subject into two articles. This one will give you a brief and simplified understanding of how autofocus works, and the next dive will make you use what modes and methods you can use for different circumstances.
Although I can indicate you on what to see, there is a huge variety between the brands. Even the variations in the same manufacturer’s model make it impossible to write a certain guide, which tells you to use the vocabulary to use the vocabulary alone to press which button, dial, or to travel the position of the menu. As a result, this is a generalization. In addition, I have simplified some of it simple. However, this will give you a basic understanding of how your camera works and which focusing methods do the best for you.
As you read it, I urge you to have your camera and its manual nearby. The instructions coming with cameras are notorious, but they will expose which button they will press, dial, or to choose submenu so that you can find relevant tasks.
Focus points
Focus points are visible to your camera visual or LCD area where it can lock the focus. The available number varies from the camera to the camera. Some old basic models may have three or five in the center of the viewfinder, while the new versions consist of dozens. Top-of-the-ranges offer more than a thousand that cover the entire frame.
Various cameras have different ways to activate and switch between focus points. Some use a joystick, while others need to press a button. Meanwhile, some work using the touch screen, and a 23few will give you an option of all those methods.
A single autofocus point allows you to manually select a location in the frame. You keep this point where you want to concentrate, such as on the eye of a subject. This also allows you to shoot previous items in the foreground.
Although this is an accurate way to really choose where you want to focus on the camera, it becomes difficult to use if you are trying to align it with rapidly growing subjects. In that case, using a group of focus points is more helpful. Meanwhile, you can also allow the camera to choose from all available points, in which case it is closest to the camera, it will focus on it.
On older and more basic cameras, the focal point is recommended for accuracy, as it can be the most sensitive. With new and more advanced cameras, all focus is likely to be equal to their ability to focus on points.
Types of autofocus
Generally, DSLRs use two different types of focusing methods: phase detection and contrast identity. Meanwhile, some new mirrorless cameras can use both combinations.
Stimulate
Imagine, say, a fence post horizontally in the middle. You can slide the top and bottom parts in different directions, and the top half of the post will not line up with it. But you can make them a position so that the top is in the phase with the bottom.
This is a very simple analogy of how autofocus works to detect the phase. If the subject was not in meditation, the camera would wrongly look at the two parts of the subject. Furthermore, based on the direction of the missing, it knows whether the lens was focusing very close or very far.
Can you see the problem there? It is great to try to marry two parts of a vertical subject. However, if you have a picture of horizontally running wire across the picture, it will be much more challenging for the line, until you cut the photo from top to bottom.
The significant advantage of the phase detection is autofocus its speed, because it knows whether it is focusing on too close or far away, using that missing.
On old, basic cameras, some phases detection focus points were available in either horizontal or vertical tilt. Each type would be better for subjects that used to run vertically for it. In other words, a horizontal point would be great to focus on that post, while a vertical point will work better on that wire.
Nevertheless, as the cameras became more advanced, cross-type focus points were introduced. Initially, it was only at the center of the frame, but new and more advanced cameras included more of them, and now all focus points can be cross-type, which can lead to more flexibility.
Adverse
When the lens of your camera falls out of the focus, it loses the opposite: white, black, and all tons in the middle become a meat. As the camera comes into the focus, the contrary becomes more clear until you can separate the subjects from each other. How a DSLR focuses when you use a live visual screen. It is more accurate but slow, because it does not know whether it is very close or far away; It is just out of focus. It will actually struggle in less opposite situations, such as evening or fog.
The technology has moved forward. Contemporary high-end models combine both systems once with hybrid autofocus systems. They provide both speed and accuracy.
In addition, while the face and eye detection has long been there, new cameras have AI-based functions that will identify and focus on other subjects, such as birds, animals and vehicles, and immediately focus on them.
in conclusion
This gives you a brief observation of autofocus. This is worth seeing the type of autofocus of your camera. Know how to move between different focus points and how to change the number of active points.
In the second article, we will explore various autofocating methods and consider which work will work best in different situations. We will also detect hyperfocal distance, which will help in achieving the maximum depth of the area in your photos.
