Focus mode.

Focus of English called Focus, focus usually means a variety of digital cameras, namely, AF, manual focus and multi-focus mode. .Auto Focus: Traditional camera, take a similar visual way to achieve auto focus distance, launch an infrared camera (or other radiation), according to the subject of reflection to determine the distance from the subject, and then measured .Results of English, focusing <P> called Focus, focus usually means a variety of digital cameras, namely, AF, manual focus and multi-focus mode. .</ P> <P> </ P> Auto Focus: <P> </ P> <P> traditional camera, take a similar visual way to achieve auto focus distance, launch an infrared camera (or other .ray), according to the subject of reflection to determine the distance between the subject and then adjusted according to the results of the measured lens combinations to achieve autofocus. .This automatic focus - direct, fast, easy, low cost, but sometimes go wrong (between the camera and the subject when there are other things such as glass, auto focus can not be achieved, or in low light .cases), accuracy is also poor, and now high-end camera generally has not used this way. .Because the camera is active, emitting radiation, so called active, and because it is actually only ranging, not through the lens of the right to determine whether the actual image of coke, so called non-TTL type. .</ P> <P> this way relative to the active AF autofocus, and later developed a passive auto focus, which is based on the actual imaging camera to determine whether the right of coke, to determine contrast detection is usually based on type, specific .is quite complicated. .Because this approach is achieved through the imaging lens, so called TTL autofocus. .It is due to this auto-focus lens-based imaging method to achieve, so the focus of high precision, low rate of errors, but the technology is complex and slow (high-level ultrasonic AF motor excluded), cost more .high. .</ P> <P> Manual focus: </ P> <P> manual focus, which is turning the focus ring by hand to adjust the camera lens so that the photos taken with a clear focus means that .face much the same way the human eye depends on the focusing screen image on the identification and proficiency of the photographer or the photographer's vision. .Early SLR and rangefinder cameras are basically focusing with manual focus to complete the operation. .Now the quasi-professional and professional digital cameras, SLR digital cameras are also equipped with manual focus function, to meet different shooting needs. .</ P> <P> Multiple Focus: </ P> <P> lot of digital cameras have more focus, or regional focus function. .When the center does not set the focus when the image center, you can use multi-point focus, or a multiple focus. .In addition to setting the position of the focus, you can also set the focus range, so that users can shoot pictures with different effects. .Common focus for the 5-point multi-point, 7 points and 9 focus. .</ P> <P> Hologram AF: </ P> <P> Hologram AF function (Hologram AF), a Sony digital camera's unique features, but also a new auto focus optical system, the use of advanced .laser holography technology that uses laser detection edge of the subject, even in the dark can also shoot photos of accurate focusing, the effective shooting distance of 4.5 meters. .</ P>.