| 摘要 |
PROBLEM TO BE SOLVED: To provide a photographing lens system of a negative precedence type in which entry of dust into a lens barrel during focusing is reduced and a change in aberration during focusing is also reduced and to provide a photographing apparatus having the photographing lens system. SOLUTION: The photographing lens system includes, in order from the object side: a first lens group G1 having negative refracting power; a second lens group G2 having positive refracting power; a brightness diaphragm S; and a third lens group G3 having positive refracting power. The photographing lens system focuses from an infinite long distance to a finite long distance in such a way that with the first lens group G1 fixed, the second lens group G2 is positioned on the image side when focused in the finite long distance with respect to the position when focused in the infinite long distance whereas the third lens group G3 is positioned on the object side when focused in the finite long distance with respect to the position when focused in the infinite long distance. COPYRIGHT: (C)2005,JPO&NCIPI
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