Vad betyder APO
- Trådstartare Razorback
- Start datum
UrbanJ
Aktiv medlem
"APO lenses. These lenses use apochromatic design and Special Low Dispersion glass (SLD) for minimum color aberration and ultimate telephoto image quality, improving contrast and sharpness.
Apochromatic (APO) telephoto lenses greatly minimize color aberration, a phenomenon created by different wave lengths of light refracting at different angles. This causes each color to have a slightly different imaging point, resulting in poor image quality.
APO Zoom Macros offer up to 1:2 magnification in the telephoto range with instant shifting from normal to macro shooting.
APO Tele-Macros offer 1:3 image size close focus, long thought to be impossible for a telephoto lens and are no larger than a fixed focal lens of the same class."
http://www.sigmaphoto.com/html/lenses.htm
Helt enkelt bättre glas.
och ja, båda har AF.
Apochromatic (APO) telephoto lenses greatly minimize color aberration, a phenomenon created by different wave lengths of light refracting at different angles. This causes each color to have a slightly different imaging point, resulting in poor image quality.
APO Zoom Macros offer up to 1:2 magnification in the telephoto range with instant shifting from normal to macro shooting.
APO Tele-Macros offer 1:3 image size close focus, long thought to be impossible for a telephoto lens and are no larger than a fixed focal lens of the same class."
http://www.sigmaphoto.com/html/lenses.htm
Helt enkelt bättre glas.
och ja, båda har AF.
