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Objektivskolan - Ordlista - LD (Tamron)

 
Förkortningen betyder
LD = Low Dispersion
 
 
Förklaring från Tamron
Low Dispersion (LD) Glass for Greater Lens Sharpness
Low dispersion (LD) glass elements in a lens help reduce chromatic aberration; the tendency of light of different colors to come to different points of focus at the image plane. Chromatic aberration reduces the sharpness of an image, but glass with an extremely lowdispersion index, has less of a tendency to separate (defract) a ray of light into a rainbow of colors. This characteristic allows the lens designer to effectively compensate for chromatic aberration at the center of the field (on axis), a particular problem at long focal lengths (the telephoto end of the zoom range), and for lateral chromatic aberration (towards the edges of the field) that often occurs at short focal lengths (the wide-angle end of the zoom range.)
 
 
Se exempel på berörda produkter
Tamron SP AF 17-50mm f/2,8 XR Di-II LD Asph IF
Tamron SP AF 180mm f/3,5 Di LD IF Macro
Tamron AF 55-200mm f/4-5.6 Di II LD Macro
 
Se länkar
tamron-usa.com




Objektiv för Canon
Nedan visas några populära alternativ (se alla)
Sigma EX 50mm f/1,4 DG HSM Sigma EX 50mm f/1,4 DG HSM
Sigma EX 50-150mm f/2,8 II DC APO HSM Sigma EX 50-150mm f/2,8 II DC APO HSM
Canon EF 16-35mm f/2,8 L USM II Canon EF 16-35mm f/2,8 L USM II
Sigma EX 300-800mm f/5,6 DG APO HSM  Sigma EX 300-800mm f/5,6 DG APO HSM
 
 

Objektiv för Nikon
Nedan visas några populära alternativ (se alla)
Sigma EX 24-70mm f/2,8 DG Macro  Sigma EX 24-70mm f/2,8 DG Macro
Nikon AF-S 70-300mm f/4,5-5,6 G IF-ED VR Nikon AF-S 70-300mm f/4,5-5,6 G IF-ED VR
Sigma EX 10mm f/2,8 DC HSM Fisheye Sigma EX 10mm f/2,8 DC HSM Fisheye
Nikon AF-S 400mm f/2,8 G ED VR Nikon AF-S 400mm f/2,8 G ED VR
 
 

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