| 摘要 |
<p>PURPOSE: The zoom lens silver miniature. The excellent optical performance is had. CONSTITUTION: A first lens group(G1) is composed of the front group(G1-1) and rear group(G1-2). The pregroup is fixed in the focusing according to the object distance. The refractive power of amount is had. The rear group is carried in the focusing according to the object distance. The refractive power of amount is had. The zooming operation is advanced.</p> |
