Classified under: Nouns denoting stable states of affairs. Hypernyms (carcinoma is a kind of...): cancer; malignant neoplastic disease (any malignant growth or tumor caused by abnormal and uncontrolled cell division; it may spread to other parts of the body through the lymphatic system or the blood stream). Hyponyms (each of the following is a kind of carcinoma):
The first Leica lens was a 50 mm f/3.5 design based on the Cooke triplet of 1893, adapted by Max Berek at Leitz. The lens had five elements in three groupsâthe third group being three cemented elementsâand was initially called the Leitz Anastigmat.n addition to the 50mm normal lens, a 35mm wide angle and a 135 mm telephoto lens were initially available. In the mid-1930s, a legendary soft-focus lens, the Thambar 90mm f/2.2 was designed, and made in small numbers between 1935 and 1949, no more than 3000 units. It is a rare collector's item today.
On a full-frame camera, a normal lens is considered to have a focal length of 50mm. This was set by the creator of the Leica camera system, Oskar Barnack, pretty much arbitrarily. In reality, any lens with a focal length of between about 40mm and 58mm will look roughly like how things appear to your eyes. On a crop sensor camera, a normal lens is usually taken to be about 35mm, although any lens with a focal length that falls between about 28mm and 36mm will work. Comparing Lenses Here are three photos of the same scene, though Iâve moved the camera position to keep the size of the subject approximately the same.