| 摘要 |
<p>The inverted telephoto wide-angle lens has a first divergent lens group consisting exclusively of meniscus lenses with a convex face on the object side. In succession from the object side, there is a divergent lens group composed of meniscus lenses with negative power of refraction, a lens group with a meniscus lens convex on the objet side and another divigerent lens group with meniscus lenses of negative power of refraction. The surface nearest the object of the lens group is aspherical and is made of plastics.</p> |
