Compound Lens: Lens system consisting of two or more elements. Compound lens designs can allow the lens designer to reduce lens aberrations, making maximum apertures larger and improve resolution.

 

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Compound Lens: Lens system consisting of two or more elements. Compound lens designs can allow the lens designer to reduce lens aberrations, making maximum apertures larger and improve resolution.

Convertible Lens: Compound lens made in two sections, the elements of which are arranged so that when one part is unscrewed it provides a new lens with approximately twice the original focal length.

Between The Lens Shutter: Shutter usually placed within the components of a compound lens close to the diaphragm.

Bi-Concave Lens: Simple lens or lens shape within a compound lens, whose surfaces curve toward the optical center. Such a lens causes light rays to diverge.

Normal Lens: A type of focal length that seems to most closely approximate the human eye's range of vision (in actuality the range of vision is narrower in a normal focal length lens, with less illusion . . . View Full Definition

Mirror Lens: Is a lens system which uses mirrors within its internal construction. Most lenses of this type have a mixture of reflecting and refracting optics and are known as catadioptric lenses.

Micro Lens: Is a lens for microscopic photography. Not to be confused with a macro lens.

Negative Lens: Is a simple concave lens that causes rays of light to diverge away from the optical axis.

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.

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