| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a converter lens having high optical performance, which can more reduce ghost and flare and to provide an optical device having the converter lens. <P>SOLUTION: In the converter lens A1 used in such a manner that it is attached to the object side (or image surface side) of a photographic lens B1, a reflection preventing film including at least one layer formed by using a wet process is formed on at least one (surface number 2 or 3 in Fig.1) of the optical surfaces of lens components (lenses L1 and L2 in Fig.1) constituting the converter lens A1. <P>COPYRIGHT: (C)2011,JPO&INPIT |
