|
|
| |
| 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 |
|
|
| |
| Se länkar |
|
|
|
|
|
| Se objektiv för just din kamera |
| Nedan visas några modeller (se alla) |
| Canon EOS 600D |
| Canon EOS 30D |
| Nikon D5 |
| Nikon D300s |
|
|
| Två populära objektiv du inte får missa |
|
|
