Objektivskolan - Ordlista - AD (Tamron)

Förkortningen betyder

AD = Anomalous Dispersion

Förklaring från Tamron

Anomalous Dispersion (AD) for Better Color Correction

Anomalous dispersion (AD) glass is a special type of optical glass that is used to achieve more precise control of chromatic aberrations, thereby enhancing overall imaging performance. Glass of this type provides an abnormally large partial dispersion ratio (amount of diffraction) for light of specific wavelength ranges (colors) within the visible spectrum. By combining AD glass having these special characteristics with elements made of normal glass having different dispersion characteristics, it is possible to control the dispersion factors of a specific wavelength. This enhanced level of control results in much lower levels of on-axis (central) chromatic aberration for telephoto lenses (or zooms used at tele-photo settings) and a significant reduction of lateral (peripheral) chromatic aber-ration for wide-angle lenses (or zooms used at wide-angle settings.)

Se länkar

tamron-usa.com

Objektiv för Canon
Nedan visas några populära alternativ (se alla)
	Sigma 28-300mm f/3,5-6,3 DG Macro
	Sigma EX 8mm f/3,5 DG Fisheye
	Canon EF 70-300mm f/4-5,6 IS USM
	Canon EF 35mm f/2 IS USM

Objektiv för Nikon
Nedan visas några populära alternativ (se alla)
	Tokina AT-X Pro 11-16mm f/2,8 DX
	Sigma EX 50-500mm f/4-6,3 DG APO OS HSM
	Sigma EX 4,5mm f/2,8 DC HSM Fisheye
	Sigma EX 200-500mm f/2,8 APO HSM DG

Objektivskolan
Våra artiklar utbildar dig (se alla)
Kameran kan påverka brännvidd
Objektivets anatomi
Skydda ditt objektiv med ett filter
Se bilder tagna med en viss brännvidd