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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.
Diagram of Petzval's 1841 portrait lens - crown glass shaded pink, flint glass shaded blue. The lenses of the very earliest cameras were simple meniscus or simple bi convex lenses. It was not until 1840 that Chevalier in France introduced the achromatic lens formed by cementing a crown glass bi-convex lens to a flint glass plano-concave lens.
A diagram of imaging with a single thick lens imaging. H 1 and H 2 are principal points where principal planes of the thick lens cross the optical axis. If the object and image spaces are the same medium, then these points are also nodal points. A camera lens forms a real image of a distant object.
English: Diagram of a single-lens reflex camera with basic labels. Based on Reflex camera labels.svg. Author of the original base image is Jean François WITZ.
Camera manufacturer: Canon: Camera model: Canon PowerShot SD790 IS: Exposure time: 1/25 sec (0.04) F-number: f/2.8: ISO speed rating: 200: Date and time of data generation: 03:09, 13 May 2008: Lens focal length: 6.2 mm: Orientation: Normal: Horizontal resolution: 180 dpi: Vertical resolution: 180 dpi: File change date and time: 22:22, 19 May ...
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Camera manufacturer: Canon: Camera model: Canon PowerShot SD790 IS: Exposure time: 1/30 sec (0.033333333333333) F-number: f/2.8: ISO speed rating: 200: Date and time of data generation: 03:09, 13 May 2008: Lens focal length: 6.2 mm: Orientation: Normal: Horizontal resolution: 180 dpi: Vertical resolution: 180 dpi: Software used: Adobe Photoshop ...
This list covers optical lens designs grouped by tasks or overall type. The field of optical lens designing has many variables including the function the lens or group of lenses have to perform, the limits of optical glass because of the index of refraction and dispersion properties, and design constraints including realistic lens element center and edge thicknesses, minimum and maximum air ...