| 摘要 |
A compact zoom lens performs a zooming operation by changing a clearance between a first lens group having a positive focal length and a second lens group having a negative focal length. The first lens group is constructed by sequentially arranging first to fourth lenses from an object side. The second lens group is constructed by sequentially arranging fifth and sixth lenses from an object side. An aperture stop is arranged just after the first lens group. The following conditions(1) 0.60<fI/fW<0.75, (2) -1.10<fII/fI<-0.90, (3) EP/fW<0.25, (4) APW/fT>-0.16are satisfied when fW is a focal length of an entire lens system at a short focal end; fT is a focal length of the entire lens system at a long focal end; fI is a focal length of the first lens group; fII is a focal length of the second lens group; EP is a distance from a lens front end to an entrance pupil; and APW is a distance from a lens rear end at the short focal end to an exit pupil.
|
