发明名称 |
Zoom lens and image capturing apparatus |
摘要 |
There is provided a zoom lens including in order from an object side to an image side, a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group having negative refractive power, and a fourth lens group having positive refractive power. In zooming from a wide-angle end to a telescopic end, the first lens group moves to the object side in a manner that a distance toward the second lens group narrows, and a distance between the third lens group and the fourth lens group widens. The third lens group includes a single lens or a single cemented lens. |
申请公布号 |
US8842210(B2) |
申请公布日期 |
2014.09.23 |
申请号 |
US201313855918 |
申请日期 |
2013.04.03 |
申请人 |
Sony Corporation |
发明人 |
Hagiwara Hiroki;Oohata Atsushi |
分类号 |
G02B13/16;H04N5/225;H04N5/262;G02B15/14;G02B9/34;G02B15/177;G02B13/00 |
主分类号 |
G02B13/16 |
代理机构 |
Rader, Fishman & Grauer PLLC |
代理人 |
Rader, Fishman & Grauer PLLC |
主权项 |
1. A zoom lens comprising: in order from an object side to an image side,
a first lens group having negative refractive power; a second lens group having positive refractive power; a third lens group having negative refractive power; and a fourth lens group having positive refractive power, wherein, in zooming from a wide-angle end to a telescopic end, the first lens group moves to the object side in a manner that a distance toward the second lens group narrows, and a distance between the third lens group and the fourth lens group widens, wherein the third lens group includes a single lens or a single cemented lens, and wherein the following conditional expressions (a) and (b) are satisfied,
Δm3/(fw×ft)1/2<0.3 conditional expression (a):d23_max/(fw×ft)1/2<0.5 conditional expression (b): where Δm3: a variation amount of a distance between the second lens group and the third lens group in varying magnification, and d23_max: a maximum value of the distance between the second lens group and the third lens group in varying magnification. |
地址 |
Tokyo JP |