Anomalous Dispersion

Anomalous Dispersion glass is a special optical glass that delivers an abnormally large partial dispersion ratio (amount of dispersion at a given wavelength range within visible light) relative to a specific wavelength zone. By combining AD glass elements with elements made of normal glass with different dispersion characteristics, dispersion factors of a specific wavelength can be controlled, resulting in effective compensation of on-axis chromatic aberration on telephoto lenses, or lateral chromatic aberration often associated with wide-angle lenses of conventional optical configuration.

The difference in partial dispersion factors between normal
optical glass and AD glass elements (schematic diagram).

14-150mm F/3.5–5.8 Di III C001

14-150mm F/3.5–5.8 Di III (Model C001) A compact all-in-one™ lens combining extreme versatility and exceptional image quality. Di III for mirrorless interchangeable-lens cameras. Lighter. Smaller. Sharper. Tamron’s high-power all-in-one™ zoom lens for Micro Four Thirds cameras – in a choice of two colours. [...]

14-150mm F/3.5–5.8 Di III C0012023-02-16T14:52:19+11:00
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