Patent ID: 11914125
Assignee: NIKON CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. A zoom lens according to claim 1, wherein the following conditional expression is satisfied:

0.70<Zidwt/Fnwt<1.10

where
Zidwt and Fnwt are defined as follows:

Zidwt={(1−βt4{circumflex over ( )}2)*βt5{circumflex over ( )}2}/{(1−βw4{circumflex over ( )}2)*βw5{circumflex over ( )}2}

Fnwt=Fnt/Fnw 

where
βt4 denotes magnification of the fourth lens group in the telephoto end state,
βt5 denotes magnification of the fifth lens group in the telephoto end state,
βw4 denotes magnification of the fourth lens group in the wide angle end state,
βw5 denotes magnification of the fifth lens group in the wide angle end state,
Fnt denotes an f number in the telephoto end state, and
Fnw denotes an f number in the wide angle end state.