10 focus modes which are necessary to know
Focus are sometimes referred to as the focus, it is to point to by the function of the camera and lens to change the relative position of the object distance and apart, print photos nz that was made from fuzzy to clear the process, it is just come into contact with photography enthusiasts the easiest way to learn a basic skill, focus accurately or not determines the image clarity and sharpness, can be said to be testing a new photographers will use the primary standard of the camera. But! Contact with photography for so long, are you sure you really mastered the technology of focus? These focus knowledge doesn't sound very strange?
First, manual focus
Though it has function of autofocus digital camera, cheap printing auckland but can still use manual focus. There are a lot of people have such misunderstanding that af than manual focus, more accurate and is not in this way, the advantages of automatic focus is to rapidly faster, more accurate but the manual focus. This is most evident in the macro and weak light photography, because the physical principle of camera autofocus (range focusing, contrast method, phase) capability, it is easy to be under the condition of weak light deviation, macro photography to focus to request more detailed, the camera itself is difficult to control. Many people use autofocus, with manual focus is not accustomed to, think it's difficult to focus and slow, and certain focus, it doesn't matter, panoramic canvas prints now most digital cameras have live view function, it for manual focus has a very big help!
Second, the single af
This should be our most familiar way of af, the camera's single autofocus refers to the half press the shutter, the camera began to focus the work, once the camera's confirm focus has been on the processor, a sharp focus, and completely finished filming, can press the shutter to focus the process ends. If you want to change the focus, that is about to release the shutter button, and then again a half press the shutter to focus. When the camera has prompted focus have been accurately, but in you press the shutter, moving your subject and then fully press the shutter, you'll get a photo out-of-focus blur, so the focus mode is only applicable to relatively static objects.
Third, continuous auto-focus (af) servo
Automatic focus mainly divided into two kinds of circumstances, in addition to single autofocus, another is the continuous autofocus. Continuous autofocus also known as servo af, is half focus after pressing the shutter, phase opportunity to lock the target or lock focus area, once the distance between the target and the camera focus changed, opportunity is automatically with coke. When you use the continuous servo af, should choose to focus in the beginning, in other words is to tell the camera a clear goal, it can be tracked. According to the characteristics of servo af, this approach is most suited to the moving target shooting, such as sports, racing and so on.
Fourth, fully automatic focus
If you choose the automatic focus and not make any adjustment, when your fingers half press the shutter, the camera began to help you choose to focus automatically. This is the simplest and most convenient way, especially when you need to capture, or have no time to take the initiative to choose to focus. But camera automatically select focus also has disadvantages, such as you cannot choose what you want to focus, the focus of the camera automatically pick is often object near the center of the picture, but there are a lot of time we choose the focus of the position of the other in the picture (such as the golden ratio), this time you will need to manually select the right focus.
Fifth, manual selection of focus
Manually choose suitable to focus, taking advantages of automatic focus and manual focus, can help you maximize control screen, especially the shooting scene, the still life and portrait photography has sufficient time to prepare. You can see to focus on the frame's instructions, and then through the button to select what you want to focus, then half press the shutter started to focus, though it took a little time, but it is easier to help you take a picture you want.
Sixth, face recognition
At present basically equipped with the latest camera such technology (need to open the live view), it through the face part of the software algorithms to identify the picture, and then use it as a focal point for tracking and detection. This approach is most suited to shoot love of children, as long as open the function, the camera's focus would have been locked in the kid's face, don't have to worry about every photo ill-matched bear children!
Seventh, af first, then the composition
Although now camera technology is more and more mature, more opportunity automatically focus on the more advanced phase for you to choose from, but does not guarantee the focus position automatically every time you need to focus, in the face of this situation, you can try to focus after heavy composition. This method is very convenient, although sometimes in order to meet the demands of heavy composition, position your camera can produce slight deviation, but the degree of deviation will not make the focal plane decoking problems resulting from the change. This method is very suitable for low light environment, namely the target using center focus (generally speaking, the center focus works best), and then move the camera to composition.
Eighth, Rear key focus
We at ordinary times half press the shutter, the camera will autofocus, all press it will take pictures. Actually we can also by setting, separate this focus and take pictures for two function, let the shutter only keep shooting function, the autofocus function in the machine back AF – ON the buttons above, or won't focus in half when pressing the shutter. AF – ON this function is suitable for the main body position will change at any time, such as ecological photography, photography or news photography and is often used to it. Method of use is to focus ON setting as the single point of focus, in filming, hold down the AF – ON to the central focus ON tracking the main body, until the focusing accuracy and composition to complete before pressing the shutter. Use the AF – ON another advantage is to reduce the trouble to recompose. Most of the time, we need to take some photos, if before each photo should be half press the shutter af, again and again to recompose and photographing, this will bring us a lot of unnecessary operation. It is possible to use AF – ON keep track you want to shoot the objective, timely to press the shutter.
Ninth, super focal length lens
Hyper focal distance concept sounds complicated, actually very simple, it refers to when the lens focus at infinity, the depth of field, a former world (clear lens closest point) to the short distance, in other words when the lens focus at infinity, from ultra focal point to infinity all clear picture. The fastest focus is not focus, understand this sentence always focusing principle. Manually adjust the focal length of the lens to the largest, as long as the subject in the recent clear dot can follow one's inclinationsly shot. A lot of street snap is the use of this technique. PS: if it is a wide Angle lens to take this kind of method, can make the picture of the depth of field to achieve most.
Tenth, the depth of field
This is North America's scenery photography very much like to use a method, for the administrative levels clear images, you can take pictures of the different focus plane, and then use the technology to synthesis them, make the picture each clear up. It is important to note that if you are still life, must strictly keep the camera parameters and the distance of the subject, it is best to put the camera on the tripod and use the same focal length, then change different focal plane took a few more copies, the final synthesis, so as to get a completely clear before and after the sharp photos.