| 摘要 |
At least one exemplary embodiment is directed to a zoom lens including a plurality of lens units, in which an interval between respective adjacent lens units varies during zooming, an aperture stop, and a refractive optical element made of a solid material having an Abbe number (nud) and a relative partial dispersion (thetagF) satisfying the following condition: <?in-line-formulae description="In-line Formulae" end="lead"?>thetagF-(-1.665x10-7.nud3+5.213x10-5.nud2-5.656x10-3.nud+0.755)>0.<?in-line-formulae description="In-line Formulae" end="tail"?> The refractive optical element is located at a position in which distances (dw, dt) from the aperture stop to the refractive optical element on an optical axis at a wide-angle end and a telephoto end, respectively, satisfy the following condition: <?in-line-formulae description="In-line Formulae" end="lead"?>dt/dw>1.1.<?in-line-formulae description="In-line Formulae" end="tail"?>
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