lens adjustment

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• Lens (anatomy) — Crystalline lens (anatomy) Light from a single point of a distant object and light from a single point of a near object being brought to a focus by changing the curvature of the lens …   Wikipedia

• Photographic lens — A photographic lens (also known as objective lens or photographic objective) is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media… …   Wikipedia

• Canon EF lens mount — The EF lens mount allows all the Canon EF lenses to be used on any of the Canon EOS line of cameras made by Canon Inc.Unlike the EF s breech lock predecessor, the FD mount, the EF mount uses a bayonet style mount. EF stands for Electro Focus :… …   Wikipedia

• Canon EF 80-200mm lens — The EF 80 200mm lens is telephoto zoom lens made by Canon. The lens has an EF mount that works with the EOS line of cameras.This lens comes in two different versions:*f/2.8L professional lens *f/4.5 5.6 consumer lensThe 2.8L version of the lens… …   Wikipedia

• Canon FL 1200mm lens — The Canon FL 1200mm f/11 was a super telephoto lens marketed by Japanese optical manufacturer Canon in June 1972. It was the longest super telephoto lens in the Canon FL system. Canon did not release an equivalent lens for the Canon FD mount, and …   Wikipedia

• Breathing (lens) — Breathing refers to when a lens optics change the apparent focal length slightly when shifting the mechanical focus. Some (often more expensive) lenses are designed to lessen the degree this effect. Lens breathing does not prevent one from… …   Wikipedia

• focus —    Adjustment of the distance setting on a lens to define the subject sharply …   Forensic science glossary

• Telescopic sight — Scope redirects here. For other uses, see Scope (disambiguation). View through a 4x rifle scope. A telescopic sight, commonly called a scope, is a sighting device that is based on an optical refracting telescope. They are equipped with some form… …   Wikipedia

• photography, technology of — Introduction       equipment, techniques, and processes used in the production of photographs.  The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …   Universalium

• Optical microscope — Microscope Uses Small sample observation Notable experiments Discovery of cells Inventor Hans Lippershey Zacharias Jans …   Wikipedia

• Accommodation — In medicine, the ability of the eye to change its focus from distant to near objects (and vice versa). This process is achieved by the lens changing its shape. Accommodation is the adjustment of the optics of the eye to keep an object in focus on …   Medical dictionary