Telephoto lens characteristics and effects of

Long focal length lens is the lens focal length than the standard camera lens. .Divided into ordinary long focal length lens and super-telephoto lens telephoto lens types. .Ordinary telephoto lens focal length close to the standard lens, and super-telephoto lens focal length is far greater than the standard lens. .135 cameras, for example, the lens focal length from 85 mm - 300 mm lens for general telephoto photography long focal length lens is the lens focal length than the standard camera lens. .Divided into ordinary long focal length lens and super-telephoto lens telephoto lens types. .Ordinary telephoto lens focal length close to the standard lens, and super-telephoto lens focal length is far greater than the standard lens. .135 cameras, for example, the lens focal length 85 mm -300 mm from the camera lens for general telephoto lens, 300 mm for the super-telephoto lens. .Long focal length lens structure according to the different light groups, but also can be divided into general telephoto lens, telephoto lens, and inverted telephoto lens reflex three. .Shooting with the use of long focal length lens features the following aspects: First, a small angle. .Therefore, the shooting range scene space is small, in the same shooting distance, the captured image is greater than the standard lens for shooting distant landscape in detail and shot close to the subject is not easy. .Second, the short depth of field. .So, make your subject in a cluttered environment are outstanding. .But to accurately focus brought some difficulties, if slightly inaccurate focus when shooting, it will cause the main virtual paste. .Third, the perspective of poor results. .This lens has obvious from the compression space and exaggerated depth background features. .Long focal length lenses, when used, are generally used for shooting distant landscape. .As the air absorption and diffuse scattering of light. .Therefore, the recorded image contrast between the smaller, in addition to more severe dust extinction, to achieve very precise focusing is not easy. .Using 300 mm super telephoto shots, but also difficult to gather in a little colored light, resulting in the issue, Deputy spectrum. .Based on the above, therefore, sometimes taken the image quality of the work is not high. .Although the use of long focal length lens is subject to many factors, but its advantage is essential. .Landscape character in the long-range shooting, travel photography, portrait photography (in shooting photos posted documents, the criteria used, the application of the ordinary about 100 mm telephoto lens shot to reduce the image distortion, if the 105 mm lens with the best of its .), take the stage in the stands, sports and other photos, taken in zoo animals, animals in the wild shooting, plus auxiliary mirror for close-up ... ... and so, in these many areas, everywhere it's useless. .Shooting with long focal length lens, the general application of photographic film and fast shutter speed, such as the use of long focal length lens 200 mm film, the shutter speed should be 1 / 250 seconds to prevent camera shake when shooting hand-held camera images caused by the virtual paste. .In general, shoot the camera in order to maintain stability, the best camera on a tripod and no tripod is fixed, there is shown in Figure 1-2 can be taken several positions in the shooting. .Super telephoto lens to only in exceptional circumstances to use, the use of feed can not simply fixed by an ordinary camera tripod, otherwise the overweight will be fixed lens camera on a tripod base broken. .Therefore, you must use a camera stand to have the kind of support for a fixed camera tripod, without this particular tripod, tripod can be used both to fixed, a fixed camera body, a fixed and support super telephoto lens. .Best to use film faster than ISO400/27 degrees to ensure adequate shutter speed..