focusing magnifying glass

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• Focusing screen — A focusing screen is a flat translucent material, usually ground glass, found in a system camera that allows the user of the camera to preview the framed image in a viewfinder. Often, a focusing screen has etched markings that differ from model… …   Wikipedia

• focusing glass — noun : a small magnifying glass used for enlarging the image thrown on the ground glass of a camera as an aid in exact focusing …   Useful english dictionary

• Ground glass — is glass whose surface has been ground to produce a flat but rough (matte) finish. A sheet of ground glass is used for the manual focusing of both still and motion picture cameras.Some cameras have no separate viewfinder, but instead use a piece… …   Wikipedia

• microscope — /muy kreuh skohp /, n. 1. an optical instrument having a magnifying lens or a combination of lenses for inspecting objects too small to be seen or too small to be seen distinctly and in detail by the unaided eye. 2. (cap.) Astron. the… …   Universalium

• Optics — For the book by Sir Isaac Newton, see Opticks. Optical redirects here. For the musical artist, see Optical (artist). Optics includes study of dispersion of light. Optics is the branch of …   Wikipedia

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

• Eyeglass prescription — Using a phoropter to determine a prescription for eyeglasses An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist or ophthalmologist, that specifies the value of all parameters the prescriber has deemed… …   Wikipedia

• Bates method — Alternative medicine / fringe therapies William Bates and his assistant. Claims The need for eyeglasses can be reversed by relaxation. Related fields Ophthalmo …   Wikipedia

• light — light1 lightful, adj. lightfully, adv. /luyt/, n., adj., lighter, lightest, v., lighted or lit, lighting. n. 1. something that makes things visible or affords illumination: All colors depend on light. 2. Physics …   Universalium

• List of Hell Teacher Nūbē characters — This is a list of characters from Hell Teacher Nūbē. Contents 1 5th Grade Teachers 1.1 Nūbē (Meisuke Nueno) 1.2 Ritsuko Takahashi (Ritsuko sensei) 1.3 …   Wikipedia

• Twin-lens reflex camera — A twin lens reflex camera (TLR) is a type of camera with two objective lenses of the same focal length. One of the lenses is the photographic objective (the lens that takes the picture), while the other is used for the waist level viewfinder… …   Wikipedia