Appeal No. 1997-2849
Application No. 08/348,811
discloses that Figure 1 is a first embodiment of the present
invention. In particular, Appellant discloses that the zoom
lens includes a first group of lenses, G1; a second group of
lenses, G2; a third group of lenses, G3 and a fourth group of
lenses, G4. Appellant discloses on page 19 of the
specification that vibration reduction mechanism 1 decenters
the third group of lenses, G3.
Independent claim 1 is reproduced as follows:
1. A zoom lens comprising in the following order from
the object side:
a first lens group having a negative refracting power;
a second lens group having a positive refracting power;
a third lens group having a negative refracting power;
a fourth lens group having a positive refracting power;
and
displacement means for attaining vibration reduction by
moving said third lens group or a partial lens group in said
third lens group in a direction substantially perpendicular to
an optical axis,
wherein when zooming is effected from a wide-angle end to
a telephoto end, an interval between said first and second
lens groups decreases, an interval between said second and
third lens groups increases, and an interval between said
third and fourth lens groups decreases, and
said zoom lens satisfies the following condition:
0.2 < *f3*/(fW·fT < 51/2
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