What is the difference between DV having autofocus and manual focus and only autofocus

I don't know if you have noticed that when you use your mobile phone to shoot** or shoot WeChat Xiao**, moving the mobile phone causes the shooting screen to change or click to select the focus point, the image will change from clear to blurry and then to clear, accompanied by the phenomenon of the picture shaking back and forth.

This phenomenon is mainly due to the fact that most of the current mobile phones use contrast focusing, and the mobile phone compares the module by moving the focusing module back and forth to get a clearer image, and when it is judged to be "clear enough", it is considered to be in good focus.

Card players, SLRs with live viewing, and DVDs are also focused in this way. As a result, there is annoying jitter when autofocusing.

Another reason is that autofocus tends to not focus accurately on the object you want.

For example, in this movie shot, the characters in front are clear at the moment, and the crowd in the back is blurred. At this time, we want the crowd behind to be clear and the characters in front of us to blur, just twist the focus ring directly, the transition is smooth and comfortable, if you use automatic contrast focusing, it will not look good.

If the DV only has autofocus, the shooting can only rely on contrast to focus. So it makes a lot of sense to have a smooth picture with manual focus and shooting**. However, it should be noted that there are two types of manual focus: physical and electronic.

The former is to twist the focus ring to directly change the position of the lens, while the latter is still by the motor to respond to the action of you twisting the electronic focus ring to drive the lens to the corresponding position, compared with the physical will have the disadvantages of delay, inaccuracy and poor hand feel.

You're talking about the depth-of-field shift effect, and you have to do it.

1. Need a camera with a small depth of field.

If the depth of field is small, you need a large CMOS or a strong telephoto capability.

2. Manual focus function is required.

These two cameras between 1500-2500 can't do it.

There are a few situations where manual focus is required:

First, some lenses are not so accurate in autofocus, will be out of focus, often appear on the sub-factory lens, if you do not adjust the camera (low-end cameras do not have this function, you may need to send it back to the official repair station for maintenance), this manual focus is emergency.

Second, the shooting scene is very complicated, such as tree branches, fences, dirty glass, or something, maybe we need to focus on the place with autofocus even if we use point focus, it still can't be aligned (point focus also has a range). This also requires manual focusing.

Third, for the purpose of artistic conception, do not focus on accurate photos, but need appropriate out-of-focus scenes, and at the same time do not have suitable focus items. Manual focus is also required at this time.

Fourth, when the light is dim, the camera's autofocus does not work, and you need to focus manually when you know the distance clearly or you can see better than the camera. For example, infinity focus for shooting the starry sky. This also requires manual focusing.

Fifth, some serious photographers feel that manual focus and more than ten times the display magnification is more accurate than autofocus.

There are other occasions to look back and think about it.

In short, manual focus is sometimes needed, well, you can give points.

You can experience the fun of playing with the camera, and the focusing speed is fast, and your autofocus element is nowhere near as good as your eyes when it comes to dark or low-contrast images.

Focus on the subject you want to express, i.e. blur the foreground or background!

You can stretch the camera to shoot farther away.

…It's autofocus, usually the autofocus camera is integrated with the body lens, in the automatic state, no matter the push, pull or pan of the lens, the camera will automatically change the focal length according to the subject, to ensure that the shooting object is clear.

That is, the camera autofocuses according to the change of lens zoom and the change of the focus subject during the shooting process, and the camera focuses on the pursuit of focusing accuracy, which is different from the camera focusing on the speed of autofocus!!

Autofocus is referred to as AF (Autofous) in the camera, which is the camera cover to adjust the subject to the clearest and most boring state, which is called autofocus.

It has the following three characteristics of lease reform.

1.Somehow automatically determines the subject being photographed by the photographer;

2.measure the distance between the subject and the camera's sensor in some way;

3.The drive motor pushes the lens's focusing device to the corresponding distance scale.

Autofocus: The focus point is a bit messy, you can't focus on it if you want to**, he will focus on**. Suitable for newbies who are just starting to learn.

Manual focus: It is more troublesome for novices because they have to constantly adjust the focus point, but the focus point is where they want.

The difference is significant. Autofocus is done by a phase-path focusing system that automatically completes the focus when you press the shutter halfway. Manual focusing requires you to adjust the focus ring on the lens to complete the focusing.

Automatic to the lack of fan urging both frustration and frustration of the camera is referred to as AF (Auto Fous).

Autofocus is when the camera responds to the object you want to shoot back to the object and adjusts the subject to the clearest state, which is called autofocus.

It has the following three characteristics.

1.Somehow automatically determines the subject being photographed by the photographer;

2.measure the distance between the subject and the camera's sensor in some way;

3.The drive motor pushes the lens's focusing device to the corresponding distance scale.

Digital cameras are very easy to use.

If A stands and lets you take pictures, there is a mountain behind you

for the back. When you use autofocus.

When DAO's digital camera shoots, the camera will automatically choose exactly what to focus on. In other words, the camera will choose to shoot Mr. A more clearly or the mountain more clearly.

If you're shooting this landscape with a Canon camera, you just need to press the shutter (the button you want to take the picture on) (don't press it all the way) and don't let go, and you'll see the landscape on the crystal display. If the lattice is hit on Mr. A's head, it means that the camera is focused on Mr. A's head. At this point, you press the shutter hard and the photo is taken.

However, if you are not satisfied with the grid hitting A-kun's head, you can release the shutter and press the shutter lightly, and the camera will automatically hit the grid on the other side.

It's fun to use a digital camera, so buy one and study it!

If you don't have any skills in taking pictures and your hands and feet are not fast enough, then I recommend you buy an autofocus one because it is very convenient.

Otherwise, when you want to take pictures, you need to adjust this and that, and you haven't taken a ** for a long time. Often, a lot of valuable shots are missed in this way.

However, if you want to take professional art photos, manual focus is better.

Actually, I don't know if there are any digital cameras on the market that don't have autofocus. I don't think I've heard of it.

May you capture the good memories and let go of all worries.

The most concise way is to read the manual.

Autofocus" is marked on the lens of a general camera (AF); The same markings are also found on the lens barrel of the camera, but the average broadcast camera requires manual focus (smaller cameras can be auto or manual).

I have not heard of the term "manual fixed focus function" before, and I personally understand that it does not refer to the "zoom function", if it is understood correctly, the camera is generally manual zoom (fixed focus); Most of the cameras are auto-zoom (w-t), and some professional cameras have a manual zoom function.

To determine whether there is a manual focus, generally only need to look at whether there is a manual focus ring in front of the lens.

Of course, there are also those that use electronic "manual" focusing, so you need to look at the menu.

To determine whether or not to focus on autofocus, simply observe whether the focus point will automatically focus clearly when the distance changes.