Which is better for servo camera mode selection?

What's the difference between AF-A, AF-S and AF-C of d90 autofocus? How to use it specifically?

First of all, the differences are as follows:

1, Wu _ is used to shoot still objects, and focus once by pressing the shutter. Because the focus is locked, press the shutter to shoot.

2.AF-C continuous autofocus _ If your position is not good, you will be in a pure position.

3.AF- automatic servo autofocus camera automatically judges the mobility of the subject and selects AF-S_F-C mode. The above AF-S is not a lens parameter, which is different from AF-S__F-S(SWM).

Second, the use is as follows:

1, single autofocus In this focusing mode, as long as the shutter is pressed half-way, the red dot in the camera viewfinder will light up, indicating that focusing is completed.

2. This focusing mode is mainly used to shoot static objects, portraits, landscapes, etc. Not suitable for shooting moving objects.

1, Canon used to have a very English name called KWANON, which means Guanyin. The company named its first 35 mm range finder camera after this. So far, there is only one KWANON camera in the world. 1936, the company officially launched the camera, the brand is HANSACANON, and the word Canon means "grand ceremony, norms and standards". Since then, Canon has become a world-famous camera brand and a symbol of the company.

There is no doubt that there are more and more resounding names. EOS(ElectronicOpticalSystem) is not only the abbreviation of the English initials of electronic optical system, but also a Greek goddess named Dawn.

(Source: Baidu Encyclopedia: Canon)

Which mode should a novice take a photo?

Novice friends take pictures and don't know what mode to use under what circumstances. The following is the most commonly used, I hope it is useful to everyone.

1 automatic mode

Automatic mode is that when the camera is exposed automatically, the camera selects the best shutter speed, aperture, ISO and flash settings for your shooting. Just press the shutter. For novice friends, this mode is the most convenient, but not very recommended.

2 Vertical mode

When using portrait mode, the camera settings will automatically select a large aperture, and the background except the target object (so-called shallow depth of field) will be blurred to highlight the portrait theme. .

3 macro mode

Macro mode shoots some very close objects. Remember, macro mode will not give you super close-up images; To do this, you need a macro lens. Macro mode is most suitable for shooting subjects related to shallow depth of field in bright conditions. If the light is insufficient, use a flash and a tripod.

4 landscape mode

Landscape mode usually uses a small aperture (high f/ number) to create a well-focused image from the foreground to the distance. Wide-angle lens is often used in landscape mode, and the scene has sufficient light and good effect. Note that if the foreground is too dark, the flash will be turned on automatically or turned off manually.

5 movement mode

Sports mode Because sports is a fast-paced activity, sports mode will give you at least 1/500 or higher shutter speed, and freeze the action with higher shutter speed. Note that you need a tripod to complete the shooting.

6-night portrait mode

In night view mode, the camera will try to balance the darkness of the background with the subject in the foreground that needs light. The light entrance must be very wide to allow enough light to capture the background, and at the same time, a flash is needed for illumination to avoid blurring. If the flash is turned off, the night portrait mode will change to night view mode.

7 advanced camera mode

The advanced camera modes of SLR cameras are -M (Manual), AV (Aperture Priority), TV or S (Shutter Priority) and P (Program Automatic).

AV aperture gives priority to the shooting aperture value, and the camera automatically sets the correct shutter speed;

The TV allows the photographer to choose the shutter speed first (for example, when shooting), and the camera will automatically set the correct aperture.

P Program mode is similar to automatic mode-shutter and aperture settings are determined by the camera.

M Manual operation mode, that is, the aperture and shutter need to be set manually. This requires experience to complete. Having said so much, it's all nonsense. Novice friends should practice from the M file if they want to improve their photography skills. Practice makes perfect.

Our current digital SLR cameras are equipped with advanced autofocus systems, but it is often difficult for novices to understand. Whether you are an entry-level or a professional camera photographer, you know that how to use the autofocus system effectively is the essence of getting clear images. A very blurred image will ruin a photo, and you can't even fix it later. Some awesome experts often end up converting images into black and white to hide their focusing problems. If you learn to focus correctly, accurate focusing can get clearer images, which every photographer should learn. I know that some photographers will argue with me, and sometimes blurred images will produce a "creative" appearance, which is a fallacy. Because I am a Nikon user, I will pay more attention to Nikon's digital SLR camera.

1) Scene # 1- Shooting outdoor sports

You are shooting outdoor sports in autofocus mode and autofocus area mode. Do you like football? Let's start by choosing the appropriate autofocus mode. Obviously, it is impossible to use a separate area /AF-S mode, because you need to constantly adjust the focal length of the camera and press the camera shutter /AF button. So be sure to use AF-C or AF-A mode. I won't let the camera decide how to focus, so switch to AF-C mode in this case. What about AF-area mode? Should we use single-point autofocus area mode, dynamic autofocus area mode, group autofocus area mode or 3d tracking mode? Personally, I will choose 3d tracking mode, and let my camera track the research object when the lens is composed. If you find that 3d tracking is not a good exercise, you can't track your object correctly and then switch to the focus with a relatively high number of dynamic AF area modes, especially if you are close to the action. If you only want to track the object closest to the camera, atrial fibrillation in the group area works well. This is the profile setting I will use:

Auto focus mode AF: c focus area mode: 3d- tracking, dynamic AF area customization-dynamic AF area: 2 1 or 5 1 customization -AF-C priority selection: release priority.

2) Scene #2- Taking a portrait outdoors

You can use any autofocus mode when shooting outdoor portraits during the day.

Auto focus mode: S-C or af focus area mode Single point af area: custom settings -AF-S preferred custom settings -AF-C preferred.

3) Scene #3- The photographer is indoors

Shooting indoors is also challenging, especially when the light is dark. If the indoor light is not good, I will use AF-S mode to ensure that my AF-Assist helps me when necessary. You can't use AF-C mode. AF-A mode should also be suitable for these situations, but I still choose AF-S mode. As far as AF-Area mode is concerned, I will choose single-point AF-Area mode and center-point autofocus.

Auto focus mode: af-S focus area mode Single point af area customization setting -AF-S priority.

4) Scene #4- Taking pictures of birds flying

It is very difficult to photograph birds, because it is difficult to predict their behavior, and their speed is often very fast. I have pointed out above that the focus of continuous shooting /AF-C mode and selecting Group-AreaAF mode or dynamic AF-Area mode is 9 and 2 1 respectively. I tried using 5 1 focusing and 3d tracking mode, but I found that these focusing modes were slow and unreliable. In fact, the central focus usually gives you the best effect. If you are a bird and it is difficult to get it through the initial focus, please try Group-AreaAF (if available).

Auto focus mode AF: c focus area mode: dynamic AF- area customization-dynamic AF area: 9 o'clock and 2 1 point customization -AF-C priority: release shutter.

5) Scene #5- Shooting Landscape and Architecture

Landscape and architecture, all focus modes are good, but I prefer to turn to AF-S mode because there is no tracking.

Auto focus mode: af-S focus area mode Single point af area customization setting -AF-S priority.

6) Scene #6- Shooting Large Animals/Wild Animals

When shooting large animals, I will be in continuous shooting /AF-C mode and use dynamic AF-Area or 3d-tracking mode. Animals are usually not as fast as birds (although sometimes they may be faster), so unless you are shooting fast movements, I will only choose the focus with the highest number of dynamic AF-Area or use 3d-tracking.

Auto focus mode AF: c focus area mode: dynamic AF-Aread-tracking/3 custom settings-dynamic AF area: the highest number of auto focus points or 3d custom settings -AF-C priority: release focus.

7) Scene #7- Photography Crowd

I am often asked how to focus on shooting a small group of people. Before I talk about focus mode, let me point out some important things. If you use a standard or telephoto lens, be sure to be careful about the distance when shooting with a large aperture. If you are too close to the group and shoot with a large aperture f/ 1.4-f/2.8, there may be only one or two people paying attention to others, unless everyone is on the same plane. The solution is to either change your smaller aperture f/5.6 or f/8 or retreat/stay to increase your depth of field, or both are parallel. If you want to blur the background and aperture, your only choice is to put everyone on the same plane, parallel to your camera. Auto focus mode, if you are shooting in broad daylight and any atrial fibrillation mode works well, I will choose single focus AF-Area mode.

Auto focus mode: S-C or af focus area mode Single point af area: custom setting -AF-S preference: focus custom setting -AF-C preference: release focus.

Over!

How to choose the correct focus mode when shooting?

If high-quality images are based on accurate photometry, then choosing the correct focusing method can help us get clear images, which is exactly one of the key links to take good photos. So, here are the focusing modes of Canon and Nikon cameras and their specific applications.

Single autofocus should be used when shooting still objects.

Single autofocus, Canon camera is called oneSHO), and T and T Nikon cameras are called ONE servo autofocus (AF-S). This autofocus mode is one of the most commonly used focusing modes in landscape photography, especially suitable for shooting still objects. All kinds of scenery, trees, mountains, seascape, sunset, falling, and so on. Of course, the single autofocus mode is not only suitable for landscape photography, but also suitable for shooting still portraits. For example, when looking for a model to shoot, you usually choose to pose, and posing means that the photographer instructs the model to do some actions or poses and then the photographer shoots, instead of the model moving all the time and then the photographer takes a snapshot. Of course, taking snapshots is also possible. When the photographer guides the model, he can capture the expression of the model at that time and shoot it in other focusing modes.

In autofocus mode, the camera stops autofocus after successfully pressing the shutter for half a time. At this point, you can readjust the composition while keeping the shutter half pressed. The focus of the photos taken in this focusing mode is clear, and the composition is more flexible, so you don't have to stick to a single focus. About how to set the focus mode.

Here are the focus mode settings for Canon and Nikon cameras:

How to set the focus mode of Canon camera: Press the AF button and turn the main dial to select a focus mode.

How to set the focus mode for mid-to high-end Nikon cameras: When the focus mode selector selects the AF icon, hold down the AF button and turn the main dial at the same time to switch between the three focus modes.

The operation method of setting the focus mode of entry-level Nikon SLR camera: press the info key to open the information display on the display screen, press the I key to enter the information display setting state, press the up, down, left and right keys to select the icon of the focus mode, and press the OK key to confirm, so as to display options such as AF-AAF-SAF-C for selection, and then press the left and right keys to select one of them.

Select continuous autofocus AISERVO (continuous servo autofocus mode AF-C) when shooting moving objects.

This focusing mode is most suitable for shooting moving objects. In this autofocus mode, when the photographer half presses the shutter to focus, the camera will automatically switch focus to keep the moving object in focus, and the camera will keep focus. If the position of the subject changes greatly during this process, as long as the mobile machine keeps any focus covering the subject, it can continue to focus.

When shooting a subject with uncertain motion, the artificial intelligence focusing mode AIFOCUS (automatic servo focusing mode AF-A) should be selected.

When we aim the camera at children or animals, we don't know what these subjects will do next, or whether they will suddenly move next, so if we use single autofocus mode or continuous autofocus mode, the effect will sometimes be blurred. At this time, we can choose to use the artificial intelligence autofocus mode. Artificial intelligence autofocus mode is an artificial intelligence mode, which is mainly used in shooting situations where it is impossible to determine whether the object is still or moving. In this mode, the camera will automatically select single autofocus mode or continuous autofocus mode according to whether the subject is moving or not.

For example, when you shoot a still animal, you use a single autofocus mode, but when you press the shutter, the animal you shoot suddenly moves, so the next photo you take will be blurred. However, if you use smart autofocus, the effect will be different, because the smart autofocus mode will help you modify the focusing mode at the moment when the animal moves, so the photos taken will not be blurred, but will show the process of a small animal moving.

So much for today's focus mode. If you want to know more about photography, you can follow me and write more regularly every day. If you have any questions or suggestions, please leave us a message below, and you will definitely reply when you see it.