Telephoto lens

A telephoto lens, in photography and cinematography, is a specific type of a long-focus lens in which the physical length of the lens is shorter than the focal length. This is achieved by incorporating a special lens group known as a telephoto group that extends the light path to create a long-focus lens in a much shorter overall design. The angle of view and other effects of long-focus lenses are the same for telephoto lenses of the same specified focal length. Long-focal-length lenses are often informally referred to as telephoto lenses although this is technically incorrect: a telephoto lens specifically incorporates the telephoto group.
Autographic film
The autographic system for roll film was launched by Kodak in 1914, and allowed the photographer to add written information on the film at the time of exposure
Charles R. Steele
Charles Richard Steele is Professor of Aeronautics and Astronautics and of Mechanical Engineering, Emeritus, at Stanford University
Mill Creek (San Juan River tributary)
Mill Creek is a stream in the San Juan National Forest in Archuleta County, Colorado, and a minor left tributary of San Juan River. It flows in a generally southwesterly direction from Mill Creek Canyon, east of Pagosa Springs between Coal Creek and Rio
Warburg–Christian method
The Warburg–Christian method is an ultraviolet spectroscopic protein and nucleic acid assay method based on the absorbance of UV light at 260 nm and 280 nm wavelengths. Proteins generally absorb light at 280 nanometers due to the presence of tryptophan
Gate capacitance
Gate capacitance is the capacitance of the gate terminal of a field-effect transistor. It can be expressed as the absolute capacitance of the gate of a transistor, or as the capacitance per unit area of an integrated circuit technology, or as the
David D. Colton
General David Douty Colton was a California pioneer, entrepreneur, and politician. The city of Colton, California, is named for him
Donner Creek
Donner Creeek is a stream in Nevada County, California, that flows into and out of Donner Lake. It is a tributary to the Truckee River
Great Transcontinental Electric Car Race
In 1968 the Great Transcontinental Electric Car Race was held between student groups at Caltech and MIT
Watson Creek (California)
Watson Creek is a stream in northern California. It runs about 3 miles, from its source near Watson Lake, below Mount Watson, draining into Lake Tahoe. The Tahoe Rim Trail runs across the creek in its headwaters meadow, and along the eastern shore of the
2022 in Egypt
Events in the year 2022 in Egypt