17-09-2007, 20:03
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חבר מתאריך: 07.11.04
הודעות: 1,140
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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.
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חתימתכם הוסרה כיוון שלא עמדה בחוקי האתר. לפרטים נוספים לחצו כאן. תוכלו לקבל עזרה להתאמת החתימה לחוקים בפורום חתימות וצלמיות.
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