Fixed focus lens
Fixed focus lens, as the name suggests, fixed focus lens without zoom function. The design of the fixed focus lens is much simpler than the zoom lens, but the general zoom lens will have an effect on the imaging during zooming, and the biggest advantage of the focus lens relative to the zooming machine is that the focus is fast and the image quality is stable. Many have a fixed focus lens digital camera shooting images of moving objects clear and stable, focusing is very accurate, the screen is fine, grainy is very slight, metering is also more accurate.
Standard lens
Standard lens: For a 35mm single lens reflex camera as an example, the standard lens usually refers to the focal length of 40 to 55 mm between the photographic lens, it is the most basic of all the lens of a camera lens.
Standard lens gives a realistic visual effects screen, so in the actual shooting, its use frequency is higher. However, on the other hand, because the standard lens picture effect and human visual effects are very similar, so the standard lens shot with the effect is very common, and even can be said to be very "plain", it is difficult to obtain Wide-angle lens or telephoto lens that render the artistic effect of the screen. Therefore, it is not easy to use a standard lens to shoot vivid images, even senior photographers also think that it is not easy to use live standard lens. However, the standard lens performance of the visual effects of a natural sense of intimacy, with the standard lens shooting and the subject is also more moderate distance, so in such as ordinary scenery, ordinary portrait, shooting and other photography occasions more, the most common Of the commemorative photo, it is more use standard lens to shoot. In addition, the photographer is often easy to overlook is that the standard lens is still a good quality imaging lens, it is the details of the details of the subject is very effective.
Telephoto lens
Telephoto lens perspective within 20 degrees, the focal length of up to tens of millimeters or hundreds of millimeters. Long focal length lens is divided into ordinary telephoto lens and super telephoto lens two categories. Ordinary telephoto lens focal length close to the standard lens, and ultra-telephoto lens focal length is far greater than the standard lens. To 135 camera, for example, the lens focal length from 85mm-300mm camera lens for the ordinary telephoto lens, 300mm or more for the ultra-telephoto lens.
Telephoto lens focal length long, small angle, large image on the film. So at the same distance can shoot a larger image than the standard lens. Suitable for shooting distant objects. Because of its depth of field than the standard lens is small, so you can more effectively blur the background highlight the focus of the main body, and the subject and the camera is generally far apart, in the portrait of the perspective of the smaller deformation, , So people often call the telephoto lens as a portrait lens. But the telephoto lens tube longer, heavy weight, the price is relatively more expensive, and its depth of field is relatively small, in the actual use of more difficult to focus on the focus, so commonly used in professional photography.
The use of long focal length lens shooting, the general should use high sensitivity and fast shutter, such as the use of 200mm long focal length lens shooting, the shutter speed should be more than 1/250 seconds to prevent the camera when shooting camera shake caused by the image of virtual paste. In general, in order to maintain the stability of the camera, it is best to fix the camera on a tripod, no tripod fixed, try to rely on things to help stabilize the camera.
Wide-angle lens
To 35mm single-lens reflex camera, for example, wide-angle lens usually refers to the lens focal length of about 17 to 35 mm between the lens.
Wide-angle lens is the basic characteristics of the lens perspective, wide field of vision. The range of scenes observed from a certain point of view is much larger than that seen by the human eye at the same point of view; the depth of field can show a considerable clarity; it can emphasize the perspective of the picture, good at exaggerating the prospects and the performance of the scene Distance feeling, which is conducive to enhancing the appeal of the screen.
Standard lens
Standard lens: For a 35mm single lens reflex camera as an example, the standard lens usually refers to the focal length of 40 to 55 mm between the photographic lens, it is the most basic of all the lens of a camera lens.
Standard lens gives a realistic visual effects screen, so in the actual shooting, its use frequency is higher. However, on the other hand, because the standard lens picture effect and human visual effects are very similar, so the standard lens shot with the effect is very common, and even can be said to be very "plain", it is difficult to obtain Wide-angle lens or telephoto lens that render the artistic effect of the screen. Therefore, it is not easy to use a standard lens to shoot vivid images, even senior photographers also think that it is not easy to use live standard lens. However, the standard lens performance of the visual effects of a natural sense of intimacy, with the standard lens shooting and the subject is also more moderate distance, so in such as ordinary scenery, ordinary portrait, shooting and other photography occasions more, the most common Of the commemorative photo, it is more use standard lens to shoot. In addition, the photographer is often easy to overlook is that the standard lens is still a good quality imaging lens, it is the details of the details of the subject is very effective.
Telephoto lens
Telephoto lens perspective within 20 degrees, the focal length of up to tens of millimeters or hundreds of millimeters. Long focal length lens is divided into ordinary telephoto lens and super telephoto lens two categories. Ordinary telephoto lens focal length close to the standard lens, and ultra-telephoto lens focal length is far greater than the standard lens. To 135 camera, for example, the lens focal length from 85mm-300mm camera lens for the ordinary telephoto lens, 300mm or more for the ultra-telephoto lens.
Telephoto lens focal length long, small angle, large image on the film. So at the same distance can shoot a larger image than the standard lens. Suitable for shooting distant objects. Because of its depth of field than the standard lens is small, so you can more effectively blur the background highlight the focus of the main body, and the subject and the camera is generally far apart, in the portrait of the perspective of the smaller deformation, , So people often call the telephoto lens as a portrait lens. But the telephoto lens tube longer, heavy weight, the price is relatively more expensive, and its depth of field is relatively small, in the actual use of more difficult to focus on the focus, so commonly used in professional photography.
The use of long focal length lens shooting, the general should use high sensitivity and fast shutter, such as the use of 200mm long focal length lens shooting, the shutter speed should be more than 1/250 seconds to prevent the camera when shooting camera shake caused by the image of virtual paste. In general, in order to maintain the stability of the camera, it is best to fix the camera on a tripod, no tripod fixed, try to rely on things to help stabilize the camera.
Wide-angle lens
To 35mm single-lens reflex camera, for example, wide-angle lens usually refers to the lens focal length of about 17 to 35 mm between the lens.
Wide-angle lens is the basic characteristics of the lens perspective, wide field of vision. The range of scenes observed from a certain point of view is much larger than that seen by the human eye at the same point of view; the depth of field can show a considerable clarity; it can emphasize the perspective of the picture, good at exaggerating the prospects and the performance of the scene Distance feeling, which is conducive to enhancing the appeal of the screen.
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