diferenças nas lentes

[zydinis]

Boas alguem me pode dizer a diferença entre a lente
Sigma 70-300 MM 169€
Sigma 70-300 APO 259€

MM é referencia de medida APO o que significa?

sorry pela burrice

 

[adolfo dias]

In order to attain the highest quality images, the APO lens has been made using special low-dispersion (SLD) glass and is designed to minimize color aberration.
SIGMA's APO zoom lenses minimize color aberration. As the refractive index of glass depends on the wavelength of light, color aberration occurs when different colors form images at different points. This problem often occurs with telephoto lenses, but the Special Low-Dispersion (SLD) glass and

Extraordinary Low Dispersion (ELD) used in SIGMA's APO lenses helps to compensate for color aberration, thereby allowing them to produce of sharp images.

n é burrice, mas tb pesquisar ajudava. tirado do site da sigma

 

[newcabaret]

In order to attain the highest quality images, the APO lens has been made using special low-dispersion (SLD) glass and is designed to minimize color aberration.
SIGMA's APO zoom lenses minimize color aberration. As the refractive index of glass depends on the wavelength of light, color aberration occurs when different colors form images at different points. This problem often occurs with telephoto lenses, but the Special Low-Dispersion (SLD) glass and

Extraordinary Low Dispersion (ELD) used in SIGMA's APO lenses helps to compensate for color aberration, thereby allowing them to produce of sharp images.

n é burrice, mas tb pesquisar ajudava. tirado do site da sigma

...agora resta saber se percebe inglês.