对焦范围与区域聚焦计算（Focus range and region focus calculation）.doc

对焦范围与区域聚焦计算（Focus range and region focus calculation） How to determine: Aperture, focal length, focus range; 1, a panoramic view of the deep practice training Subject: General scenery scenery, flowers, city construction and other strong impact. Requirements: picture all coke. Recommendations: first, using a wide-angle lens: 24MM - 35MM - 16: F11 film, aperture, aperture priority mode AE. 2, single focus exercise training Requirements: focus on the main subject, the shallow depth of field. Suggestion: in the telephoto lens: 85MM above, the aperture of F5.6 or more. Aperture priority mode AE. 3, stop training exercises Subject: sports, walking car, train, flowing water, waterfall etc.. Requirements: the violent motion of the object is the instant action or instantaneous expression record. Suggestion: high speed shutter 1/1000 seconds, shutter speed priority mode AE. 4, dynamic exercise training Subject: sports, dynamic, flowing water, waterfall etc.. Requirements: part of an athlete and dynamic human body virtual or dynamic virtual real background. The flowing water, the waterfall has streamlined. Suggestion: slow shutter 1/15 11 seconds seconds. Start from 1/30 seconds to practice, then 1/15, 1/8, 1/4, 1/2, 1 by practice. The use of three tripod. 5, practice shooting training Requirements: highlight the theme, concise picture, can convey the photographed scene atmosphere. * this training is the foundation of composition training Suggestion: telescopic lens, aperture. 6, a practice training Subject: flowers, still lifes and insects. Requirements: the subject for screen ratio as large as possible, highlighting the object shape and the interesting part, high definition. Suggestion: using a macro lens or macro function and extension ring, the shortest distance of photography, camera and object parallel. The use of three tripod and shutter line. 7 kinds of training, the focal length of the lens (lens the focal length) the use of practice Using a variety of zoom lens (lens