Glass-backed plates, rather than film, were generally used in astronomy because they do not shrink or deform noticeably in the development process or under environmental changes. Christy by carefully examining a bulge in Pluto's image on a photographic plate. Pluto was discovered using photographic plates in a blink comparator its moon Charon was discovered 48 years later in 1978 by U.S. The first natural satellite discovered using photographic plates was Phoebe in 1898. Discovery of minor planets using photographic plates was pioneered by Max Wolf beginning with his discovery of 323 Brucia in 1891. Many solar system objects were discovered by using photographic plates, superseding earlier visual methods. A number of observatories, including Harvard College and Sonneberg, maintain large archives of photographic plates, which are used primarily for historical research on variable stars. Many famous astronomical surveys were taken using photographic plates, including the first Palomar Observatory Sky Survey ( POSS) of the 1950s, the follow-up POSS-II survey of the 1990s, and the UK Schmidt survey of southern declinations. Workshops on the use of glass plate photography as an alternative medium or for artistic use are still being conducted. They were in wide use by the professional astronomical community as late as the 1990s. However, photographic plates were reportedly still being used by one photography business in London until the 1970s, and by one in Bradford called the Belle Vue Studio that closed in 1975. Glass plate photographic material largely faded from the consumer market in the early years of the 20th century, as more convenient and less fragile films were increasingly adopted. It took photographs on glass plates measuring 8 feet (2.4 m) × 4.5 feet (1.4 m). Lawrence in 1899, specifically to photograph "The Alton Limited" train owned by the Chicago & Alton Railway. Image resulting from a glass plate negative showing Devil's Cascade in 1900.Ī view camera nicknamed "The Mammoth" weighing 1,400 pounds (640 kg) was built by George R.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |