Related Words

Lens Shade: See lens hood.

Reflex Lens: Alternative term for mirror lens.

Process Lens: Lens system designed specifically for high quality copying.

Positive Lens: Simple lens that causes light rays from a subject to converge to a point.

Shade Grown: Describes coffee grown under a shade canopy. Arabica coffee is traditionally grown in shade in many (but not all) parts of Mexico, Central America, Colombia, Peru, and Venezuela, and in som . . . View Full Definition

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.

Sky Shade: Alternative term for a lens hood.

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 sigh . . . View Full Definition

Portrait Lens: Lenses produced specifically for portraiture. They usually have a long focal length and produce a slightly diffused image.

Petzval Lens: Early lens system developed by joseph petzval. It had a very wide aperture and was relatively free from aberration. Many modern lenses have developed from this simple three-element design.