JPS642011A - Photographing lens - Google Patents
Photographing lensInfo
- Publication number
- JPS642011A JPS642011A JP15900187A JP15900187A JPS642011A JP S642011 A JPS642011 A JP S642011A JP 15900187 A JP15900187 A JP 15900187A JP 15900187 A JP15900187 A JP 15900187A JP S642011 A JPS642011 A JP S642011A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- groups
- lens groups
- object side
- refracting power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Lenses (AREA)
Abstract
PURPOSE: To satisfactorily correct the various aberrations of a photographing lens in a reference state and to shorten the overall length of the lens by disposing lens groups having positive refracting powers and lens group having a negative refracting power successively from an object side.
CONSTITUTION: The lens groups IWIII have the positive refracting powers and the lens group IV has the negative refracting power. The respective groups move simultaneously. The respective lens groups IWIV are respectively independently moved to the object side in such a manner that the three air spacings formed by the adjacent two lens groups increase at the time of focusing the lens from an infinite object to a near distance object. The fluctuations in the aberrations arising from a change in magnification are thereby decreased.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-159001A JPH012011A (en) | 1987-06-25 | shooting lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-159001A JPH012011A (en) | 1987-06-25 | shooting lens |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS642011A true JPS642011A (en) | 1989-01-06 |
JPH012011A JPH012011A (en) | 1989-01-06 |
Family
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