Entertainment / Photography / Zoom Lens: Is a lens which is constructed to allow continuously variable focal length within a specific range. The effective aperture and focus settings remain unchanged throughout such adjustments.
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Entertainment / Photography / Reflex Lens: Alternative term for mirror lens. MORE
Entertainment / Photography / Process Lens: Lens system designed specifically for high quality copying. MORE
Entertainment / Photography / Positive Lens: Simple lens that causes light rays from a subject to converge to a point. MORE
Entertainment / Photography / Single Lens Reflex (SLR): Stands for single lens reflex. It is a camera of 35mm or medium format in which a system of mirrors shows the user the image precisely as the lens renders it. MORE
Technology / Digital Cameras / Single-Lens Reflex (SLR): An SLR, or single-lens reflex, camera is named for its picture-taking mechanism. In a film SLR, the viewfinder uses a 45°-angled mirror to see through the lens; that mirror snaps out of sight quickly MORE
Entertainment / Photography / Soft Focus Lens: Lens, uncorrected for spherical aberrations, used to produce a soft focus effect. MORE