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The focus itself may be adjusted in a variety of ways. Larger view cameras and the like slide the lens closer or further from the film plane on rails; on smaller cameras, a focus ring on the lens is often rotated to move the lens elements by means of a helical screw. Other systems include levers on the lens or on the camera body.
This is an accepted version of this page This is the latest accepted revision, reviewed on 17 February 2025. Optical device for recording images For other uses, see Camera (disambiguation). Leica camera (1950s) Hasselblad 500 C/M with Zeiss lens A camera is an instrument used to capture and store images and videos, either digitally via an electronic image sensor, or chemically via a light ...
Creating images of the human body or parts of it, to diagnose or examine disease. Bioluminescence imaging – a technique for studying laboratory animals using luminescent protein. Calcium imaging – determining the calcium status of a tissue using fluorescent light. Diffuse optical imaging – using near-infrared light to generate images of ...
Different kinds of camera lenses, including wide angle, telephoto and speciality. A camera lens (also known as photographic lens or photographic objective) is an optical lens or assembly of lenses (compound lens) used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.
Canon PowerShot A and Canon PowerShot G cameras have a built-in or non-interchangeable primary (zoom) lens, and Canon has "conversion tube" accessories available for some Canon PowerShot camera models which provide either a 52mm or 58mm "accessory/filter" screw thread. Canon's close-up, wide- (WC-DC), and tele-conversion (TC-DC) lenses have 2 ...
These cameras use the Sigma SA-mount, for which Sigma makes a line of lenses. The Sigma DSLR cameras that use the SA mount are the Sigma SD9, SD10, SD14, SD15 and SD1 Merrill. These cameras are noteworthy for their use of the Foveon X3 sensor, an image sensor that works on quite different principles from the sensors used in all other digital ...
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Generic mode dial for digital cameras showing some of the most common modes. (Actual mode dials can vary; for example point-and-shoot cameras seldom have manual modes.) Manual modes: Manual (M), Program (P), Shutter priority (S), Aperture priority (A). Automatic modes: Auto, Action, Portrait, Night Portrait, Landscape, Macro. A dial with more modes