Entertainment / Photography / Afocal Lens: Lens attachment that alters the focal length of the camera lens without disturbing the distance between the lens and the film plane.
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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 / Portrait Lens: Lenses produced specifically for portraiture. They usually have a long focal length and produce a slightly diffused image. MORE
Entertainment / Photography / Reflex Lens: Alternative term for mirror lens. 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