The main introduction of area exposure method

The following is a picture of Adams and its shooting process, so as to understand his regional exposure method.

The Storm in Winter was filmed by Adams in Yosemite National Park on 1940. It was a day in early February. The storm was mixed with heavy rain at first, then the rain turned into snow, and it didn't clear up until noon. Adams drove to a newly discovered shooting spot that can stimulate creative inspiration. Standing here, he can see the charming scenery of Yosemite Canyon. He immediately set up an 8× 10 camera, fitted with a Kodak XV lens of 12 1/4 inches, and made a composition of the hillside and the bottom of the picture. Then wait for the clouds to form a moving shape in the upper part of the picture. In order to avoid image blurring caused by cloud movement, the exposure time is very short.

For this kind of scenery, if it is exposed with ordinary average readings and developed normally, the contrast of the negative will be very low. Clouds are gray, the bright part of the sun is pale, and the shadow part is soft. Adams used the area exposure method, and he could foresee what the final photo would look like before shooting. So he measured a series of areas. At that time, the point exposure instrument had not yet come out.

Adams recalled: "I added a tube in front of the exposure meter to reduce its viewing angle to about 15." Of course, I need to multiply the brightness value of any part measured by the sidelight by 4. In this scene, I can conclude that the brightness of the brightest part of the display is 160 Candeira/square foot, and put this brightness in seven areas. I found that the brightness of the darkest tree on the right (photometric measurement is 3 candles per square foot) falls in the first area. Because there is a layer of Bo Xue hanging in the forest, its average brightness falls in the second and third areas. Except for the bright waterfalls with arrows, the brightest part is the clouds. I estimate that the brightness of the waterfall is about 500 candles per square foot. In order to improve the brightness of the trees, I can increase the exposure by 2 to 4 times, but this may lose some transparent brightness that I think the photos will show. In view of this lowest exposure rate, development is to improve the normal area by one area. This makes the high brightness (originally located in the seventh area) reach the brightness standard of the eighth area, and various light and dark levels generally appear bright. "

The developed negative retained the information that Adams wanted to reflect, and after some shading and lighting in the darkroom, a very realistic photo was obtained. This is a faithful representation of the scene in front of him at that time.

Adams summed up his shooting practice with the area exposure method. He said, "I found that if I carefully follow the accuracy provided by the area system and actively imagine the expected image, my shooting results are almost always satisfactory, at least technically." However, the consequences of simple calculation errors may be serious, for example, forgetting to consider the lens ring or filter factor. It should be remembered that in case of failure in shooting under complicated circumstances, the exposure record of each photo should include exposure details and development instructions, which can be used as a reference for diagnosis. "

Attachment: ansel adams

Ansel adams was born in 1902 in San Francisco on the west coast of the United States. When I was a teenager, I studied music and decided to become a pianist. Because of overwork and physical damage, I went to my uncle Yosemite's house for recuperation. His uncle runs a photo studio, which is why he began to express Yosemite's scenery with photography at the age of 14, and laid the foundation for his outstanding contribution to photography all his life. Later, during his long photography career, he always had a special feeling for Yosemite and came here to take pictures every year. Adams has a great feeling of "never getting tired of watching and shooting" about Yosemite.

Adams' achievements in photography were greatly influenced by his predecessor Stent and Stie Gerriets, a representative of pure photography. He first studied under Weston, and then became close friends with Weston. Influenced by Weston's ideological style, 1932 set up a photography team in the name of "F/64". "F64" was the smallest aperture on the camera at that time, and the name of this organization was the declaration of their artistic ideas. In other words, they advocate using a small aperture to obtain a long depth of field and excellent clarity. So Adams belongs to the "pure photography school". His works deserve to be listed among the typical and best masterpieces of pure photography.

Adams uses "pure" photography art to express the real and beautiful world, arousing photographers' attention to the performance characteristics and great potential of pure photography art. Adams believes that photographers, like other artists, choose their own unique things and fields to express the world and themselves. This is how he regulates his creative activities. In his photography creation activities for more than 60 years, he has always been famous for his landscape photography. It can be said that each of Adams' works has its own style and characteristics. His landscape photos have a great feature, that is, there are no characters on the screen, no connection with society and history, and no news elements, but the beauty expressed in his works is beyond people's general feelings. He has been obsessed with Yosemite since his youth, and the scenery here is an inexhaustible source of his creation. More interestingly, Adams' poetic landscape photography of Yosemite not only attracted millions of tourists here, but also earned Adams the reputation of "Yosemite Master" and enabled the US Congress to pass the National Park Law on 19 16, opening Yosemite as a national park. Adams is proud that photography has played such a remarkable social function.

For decades, Adams climbed the King's Canyon in eastern California with heavy photographic equipment on his back, which made nature look particularly profound and charming. The "regional exposure method" advocated by him is also to get the best quality of the works, thus showing the beauty of the scenery. Adams is also a photographer and photographer. During the twenty years from 1960 to 1979, he published fifteen books. 65438-0943 entered new york Art Museum as the director of photography department. 1946 returned to his hometown of San Francisco and taught photography at the State Academy of Fine Arts. Adams kept writing and creating until he was 80 years old, and his art was amazing. 1984 February, the old photographer died.