How many kinds of digital cameras are there according to their uses? What is a telephoto camera? How to focus when shooting?

Digital cameras can be divided into four types in use, namely telephoto cameras, card cameras, household cameras and SLR cameras. Among them, telephoto camera refers to the model with large optical zoom lens. But the bigger the optical zoom lens, the clearer the image and the farther the scene. When shooting with a camera, we can choose face focusing, fixed-point autofocus and single-point autofocus modes. SLR camera: SLR camera in interchangeable lens digital camera is a single lens reflex camera. This kind of camera will refract light into the lens when it works, and then refract it to the focusing screen above the camera after reaching the reflector. After passing through the pentaprism, you can directly see the scene and then form a phase. The feature of this camera is that it can replace different camera lenses for shooting, and the shooting effect is clearer.

Card camera: compact and stylish, easy to operate. Card camera is also a kind of SLR camera. The biggest feature of this camera is its small size, which is very suitable for carrying around and very light to use. Card camera can meet the most basic characteristics of taking pictures. Using basic exposure compensation, they can complete some basic shooting and even shoot some movies. Color clarity and contrast are relatively high, which can cooperate with shooting to complete some beautiful landscape photos. However, this camera has weak manual function, high power consumption and fixed lens.

Telephoto camera: the movable lens can change the shooting, and the shooting length is long. A telephoto camera is a camera with a large optical zoom lens. In some digital cameras with long lenses, the larger the moving space between the lens and the inner photoreceptor, the larger the zoom factor. The principle of this camera is similar to that of a telescope. The longer the focal length, the shallower the scene. We can adjust the zoom factor when shooting with this camera, which can better shoot the future.

Household camera: civilian, easy to use. The concept of home camera in the field of digital camera is vague, and all cameras except SLR cameras can be classified into this range. The purpose of home camera is to meet the needs of home photography. Pixels are between 800 ~100000 pixels, and photos are taken directly with LCD screen, most of which are landscapes, portraits, night scenes, etc.

We can choose different focusing modes when shooting. We want to focus easily when shooting with a digital camera, and we can choose different modes. When focusing for a single time, you need to track the face by half pressing the shutter, and you can set eye recognition to focus accurately. If you shoot a quiet long-distance scenery, you can choose the fixed-point autofocus mode, which can show the details at close range.

When shooting people's movements, you can choose single-point autofocus to highlight specific parts of the human body, so that the details of exposure are more accurate. In the process of shooting people and scenery, we need to divide it into dynamic shooting or static shooting according to its shooting effect, and then decide what shooting mode to choose, adjust the shooting distance and complete the shooting.

In short, cameras can be divided into SLR cameras, card cameras, telephoto cameras and home cameras according to their uses. The function of telephoto camera is to shoot distant scenery. When shooting, you need to choose the shooting mode according to different people or scenes.