REAR CONVERSION LENSES

摘要

A rear conversion lens, which may include a plurality of lenses may be disposed at a side of master lenses facing an image side for varying a focal length, and may include: a first lens having a positive refractive power; a second lens having a biconcave shape; a third lens having a positive refractive power; a fourth lens having a positive refractive power; and a fifth lens having a negative refractive power. The first to fifth lenses may be sequentially arranged in a direction from an object side to the image side.

主权项

1. A rear conversion lens disposed at a side of a master lens facing an image side for varying a focal length, the rear conversion lens comprising:
a first lens having a meniscus shape convex toward an image side and a positive refractive power; a second lens having a biconcave shape; a third lens having a positive refractive power, wherein an absolute value of curvature of a side surface of the third lens facing toward an object side is greater than an absolute value of curvature of an image-side surface of the third lens; a fourth lens having a positive refractive power and a biconvex shape; and a fifth lens having a negative refractive power, wherein the first, second, third, fourth, and fifth lenses are sequentially arranged in a direction from an object side to the image side.