What is the difference between AF and MF focus modes?

Difference between AF and MF:

AF stands for: Autofocus, MF means Manual Focus.

The main thing is whether the photographer is used to manual focus or autofocus when taking pictures.

AF stands for autofocus, and the camera automatically controls the lens for focusing. The autofocus method is achieved by lens imaging, so it is called TTL autofocus. Because this autofocus method is based on lens imaging, it has high focusing accuracy and a low error rate, but it is technically complex, slower (except for advanced autofocus lenses with ultrasonic motors), and high cost.

MF stands for manual focusing, which is when the user twists the focus ring to focus by their own senses. Manual focusing, it is a way of focusing by manually turning the focus ring to adjust the camera lens to make the shooting clear, which largely depends on the human eye's judgment of the image on the focusing screen and the proficiency of the photographer and even the photographer's vision. Early SLR cameras and rangefinder cameras basically used manual focus to complete the focusing operation.

Today's quasi-professional and professional digital cameras, as well as DSLR digital cameras, are equipped with manual focus function to meet different shooting needs.

How can there be no difference, AF is autofocus, MF is manual focus. When using MF, there is no half-press shutter to focus, and you can only focus by turning the lens focus ring by hand.

AF is autofocus, MF is manual focus.

When AF MF mode is selected, you can manually focus by turning the focus ring by holding down the shutter button halfway after autofocus.

AF-A: Autofocus mode.

In other words, the 2113 camera automatically selects the focus according to the subject. Although it is more convenient, there may be accidents, so it is generally not recommended for everyone.

AF-C: Continuous focus.

For example, if you want to photograph a girl riding a bicycle, but because the subject is moving, you can use a single focus to blur it, so you need to use continuous focus. (Left: One-shot focus, Right: .)

Continuous Focus) In short, continuous focus is suitable for shooting moving, moving objects.

AF-S: Single-touch mid-secondary focus.

It is suitable for shooting still objects, such as landscapes, flowers, and still portraits.

Automatic vs. manual, manual focusing requires turning the front of the lens to focus.

OneThe meaning is different

MF: Manual focus, AF: Autofocus.

Second, the role is different:

MF: Manual focus is a focusing method that adjusts the camera lens by manually rotating the focus ring to make the shooting clear, which largely depends on the human eye's judgment of the image on the focusing screen and the photographer's proficiency and even the photographer's eyesight.

AF: Autofocus is the way the camera autofocuses. Generally refers to the design of the camera to measure the distance in a specific area, and then adjust the lens in the lens to form a focus, so that the image in the camera looks clear. In contrast to MF manual focusing, AF has become the standard term for modern camera technology.

Classify. Active: Infrared on the camera.

Generators and ultrasonic generators emit infrared light.

or ultrasound to the subject. The receiver on the camera receives the reflected infrared search light or ultrasonic waves for focusing, and its optical principle is similar to that of triangulation focusing method. There is also the energy method in the active type, which is used for autofocus in low-end general cameras, and is widely used in various head-up view cameras.

Active focus on the bevel.

Smooth faces have difficulty focusing. Difficult to focus on subjects with high brightness and long distances.

This is a collapse due to the light emitted being reflected in other directions, or not reaching the subject's reach. Since the active camera actively emits light or waves, it can focus in low contrast and low light. For subjects with thin lines, it can autofocus on moving subjects.

The disadvantage is that it is difficult to focus when the subject can absorb light or waves, and it is also reflected by the glass, so it is difficult to focus through the glass.

The above content reference: Encyclopedia - Autofocus.

Taking a camera as an example, the differences between AF and MF on the lens are as follows:

1. MF: manual focus, AF: autofocus.

2. MF: Manual focus is a focusing method that adjusts the camera lens by manually rotating the focus ring to make the shooting clear, which largely depends on the human eye's judgment of the image on the focusing screen and the photographer's proficiency and even the photographer's eyesight. af：

Autofocus is the way a camera autofocuses. Generally refers to the design of the camera to measure the distance in a specific area (generally referred to as **, but the current system can specify any corner seen in the viewing window), and then adjust the lens in the lens to form a focus, so that the image in the camera looks clear; In contrast to MF manual focusing, AF has become the standard term for modern camera technology.

A camera, or camera, is a device that uses the principle of optical imaging to form an image and record it with a negative. The camera is an optical instrument used for photography, and the light reflected by the subject is focused through the camera lens and the shutter that controls the amount of light, and the subject forms a latent image on the photosensitive material in the camera obscura, and forms a permanent image in the slag after processing, which is called photography. A digital camera is a type of camera that uses an electronic sensor to convert optical images into electronic data.

Unlike ordinary cameras, which rely on the chemical changes of silver bromide on film to record images, the sensor of digital cameras is an optically inductive charge-coupled (CCD) or complementary metal-oxide-semiconductor (CMOS). Before the image is transferred to a computer, it is usually stored in a digital storage device (usually using flash memory; Floppy disks and rewritable discs such as Rewritable Discs (CD-RW) have been rarely used in digital camera equipment).

It's af. is an abbreviation for autofocus in camera, which means autofocus. AF camera is an abbreviation for autofocus camera.

The focus of this camera is done automatically by an electronic rangefinder. When the camera shutter button is pressed, depending on the distance of the subject, the electronic rangefinder can control the lens to move back and forth in the corresponding position, or rotate the lens to the desired position. 2.

There are a few different ways to autofocus. Currently, active infrared systems are the most widely used systems. The working procedure of this system is:

A beam of infrared light is emitted from the light-emitting element of the camera, which illuminates the spinal foci lying on the subject, which is then reflected on the camera and the sensor receives the echo. The camera measures the shooting distance according to the angle formed by the luminous and reflected beams, enabling autofocus. The camera has an autofocus frame in the viewfinder**, and the subject must be aimed at when shooting, otherwise the focus will not be accurate and the image will be blurry.

If the subject should not be in the frame**, you can use the Focus Memory Lock (AF-L button) to shoot with automatic focus Sakura.