Thursday, April 25, 2019

HALF DOME PHOTOGRAPHED BY ANSEL ADAMS



ANSEL ADAMS (1902-1984)
Half Dome (2, 695 m - 8,844 ft)  

United States of America (California) 

In  Moon and Half Dome, Yosemite National Park, 1960 

The mountain
Half Dome (2, 695 m - 8,844 ft)   is a granite dome at the eastern end of Yosemite Valley in Yosemite National Park, California, part of the Sierra Nevada Range. It is a well-known rock formation in the park, named for its distinct shape; One side is a sheer face while the other three sides are smooth and round, making it appear like a dome cut in half. The granite crest rises more than 4,737 ft (1,444 m) above the valley floor. The impression from the valley floor that this is a round dome that has lost its northwest half is an illusion. From Washburn Point, Half Dome can be seen as a thin ridge of rock, an arête, that is oriented northeast-southwest, with its southeast side almost as steep as its northwest side except for the very top. Although the trend of this ridge, as well as that of Tenaya Canyon, is probably controlled by master joints, 80 percent of the northwest "half" of the original dome may well still be there. As late as the 1870s, Half Dome was described as "perfectly inaccessible" by Josiah Whitney of the California Geological Survey. The summit was finally conquered by George G. Anderson in October 1875, via a route constructed by drilling and placing iron eyebolts into the smooth granite.
Today, Half Dome may now be ascended in several different ways. Thousands of hikers reach the top each year by following an 8.5 mi (13.7 km) trail from the valley floor. After a rigorous 2 mi (3.2 km) approach, including several hundred feet of granite stairs, the final pitch up the peak's steep but somewhat rounded east face is ascended with the aid of a pair of post-mounted braided steel cables originally constructed close to the Anderson route in 1919.
Alternatively, over a dozen rock climbing routes lead from the valley up Half Dome's vertical northwest face. The first technical ascent was in 1957 via a route pioneered by Royal Robbins, Mike Sherrick, and Jerry Gallwas, today known as the Regular Northwest Face. Their five-day epic was the first Grade VI climb in the United States. Their route has now been free soloed several times in a few hours' time. Other technical routes ascend the south face and the west shoulder.

 The photographer
Ansel Easton Adams was an American photographer and environmentalist.
His black-and-white landscape photographs of the American West, especially Yosemite National Park, have been widely reproduced on calendars, posters, books, and the internet. Adams and Fred Archer developed the Zone System as a way to determine proper exposure and adjust the contrast of the final print. The resulting clarity and depth characterized his photographs. He primarily used large-format cameras because their high resolution helped ensure sharpness in his images. Adams founded the photography group known as Group f/64, along with fellow photographers Willard Van Dyke and Edward Weston and Imogen Cunningham.
In September 1941, Adams contracted with the Department of the Interior to make photographs of National Parks, Indian reservations, and other locations for use as mural-sized prints for decoration of the Department's new building. Part of his understanding with the Department was that he might also make photographs for his own use, using his own film and processing.
Full entry Wanderingvertexes

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2019 - Wandering Vertexes...
by Francis Rousseau