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A zoom lens is a system of camera lens elements for which the focal length (and thus angle of view) can be varied, as opposed to a fixed-focal-length (FFL) lens . A true zoom lens or optical zoom lens is a type of parfocal lens, one that maintains focus when its focal length changes. [1]
Varifocal lenses are also used in many modern autofocus cameras as the lenses are cheaper and simpler to construct and the autofocus can take care of the re-focussing requirements. Many modern zoom lenses are now confocal, meaning that the focus is maintained throughout the zoom range. Because of the need to operate over a range of focal ...
2014 logo. A beta version of Zoom that could host conferences with only up to 15 video participants was launched on August 21, 2012. [7] On January 25, 2013, version 1.0 of the program was released with an increase in the number of participants per conference to 25. [8]
The camera under test senses a real image of the virtual image of the target, and the sensed image is displayed on a monitor. [9] Monitor display of sensed image from the camera under test. The sensed image, which includes the target, is displayed on a monitor, where it can be measured.
There's no doubt Zoom is a hugely popular videoconferencing platform. The company ended 2020 with approximately 81,900 corporate customers -- a 61% year-on-year increase. That increase was largely ...
Kiron Corporation was a subsidiary of Kino Precision Industries, Ltd., a Japanese manufacturer of photographic lenses.Kiron was based in Carson, California, operating in the 1980s primarily as the United States distributor of Kiron lenses, which were offered in a variety of mounts compatible with many popular 135 film manual focus single-lens reflex camera systems.
A digital single-lens reflex camera (digital SLR or DSLR) is a digital camera that combines the optics and mechanisms of a single-lens reflex camera with a solid-state image sensor and digitally records the images from the sensor. The reflex design scheme is the primary difference between a DSLR and other digital cameras.
Lower-end camera phones use only digital zoom and do not have optical zoom, while many higher-end phones have additional rear cameras, including fixed telephoto lenses that allow for the simulation of optical zoom. Full-sized cameras generally have an optical zoom lens, but some apply digital zoom automatically once the longest optical focal ...