发明名称 Negative-lead Zoom Lens having three groups
摘要 <p>Disclosed is a zoom lens having a first lens group (GR1) having a negative refractive power, a second lens group (GR2) having a positive refractive power, and a third lens group (GR3) having a positive refractive power arranged in the mentioned order from object to image side, wherein the first lens group (GR1) includes a negative lens (G1) and a positive lens (G2) having an aspherical surface and satisfies the following inequality (1): 0.4 &lt; D1/fw &lt; 0.66 where D1 represents the distance, inside the first lens group (GR1), between the lens surface closest to the object and the lens surface closest to the image, and fw represents the focal length with the zoom lens set to the wide-angle position.</p>
申请公布号 EP1632803(A2) 申请公布日期 2006.03.08
申请号 EP20050291834 申请日期 2005.09.06
申请人 SONY CORPORATION 发明人 IWASAWA, YOSHITO;ADACHI, NOBUYUKI;MURATA, MASAYUKI
分类号 G02B15/177 主分类号 G02B15/177
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