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相机的光圈、快门与ISO及三者之间的关系(Came

admin2020-05-06 03:29:02113人围观

  相机的光圈、快门与ISO及三者之间的关系(Camera aperture, shutter and ISO and the relationship between the three)

  [camera] the aperture of the camera, the relation between the shutter and the ISO and the three

  ISO value: (ISO is the abbreviation of International Organization for Standardization). ISO is not a sense of sensitivity, but a quantification of sensitivity

  In traditional cameras and digital cameras, there is this setting, which is the size of the film or CCD. The ordinary domestic film ISO value is 100, which seems like a standard value, this value in the following, we can achieve a variety of occasions correct exposure, suggest that learning friends can use this value to operate. If less than 100, such as 50 or lower, then the quality of the picture will be improved, the picture is more delicate, suitable for shooting portraits or scenery, still life and other scenes, the level is very rich. The effect of low sensitivity is to increase the duration of the illumination, which means that the aperture is enlarged or the shutter is slowed to supplement the exposure so as to achieve the correct picture requirements. If the sensitivity is higher than 100, such as 200400 or more, then, the film grain will increase, CCD picture there is noise, its advantage is that you can choose a faster shutter speed or smaller aperture, so by reducing the light to reach the correct exposure. This method is more suitable for capturing motion scenes or moving scenes, and reasonable use can produce special effects. It is also a good idea to increase the sensitivity in a darker environment.

  Diaphragm:

  Light controls the aperture of the lens, the lens aperture is usually larger (smaller F-measure), the light is more characteristic of large aperture brings is able to obtain a very shallow depth of field, is the subject clear, before and after the scene blur effect, this method is often used in portrait photography, can highlight subject. Of course, the focus below the big aperture must be accurate, oth