Macro lens system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 7, 2015
Grant Date -
Oct 10, 2013
app pub date -
Mar 29, 2013
filing date -
Apr 6, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A macro lens system includes a positive first lens group, and a positive or negative second lens group, in that order from the object side, wherein at least the first lens group moves toward the object side when focusing on an object at infinity to an object at a close distance, wherein the second lens group includes a negative first sub-lens group and a positive second sub-lens group, in that order from the object side, wherein the following condition (1) is satisfied:
wherein f2A designates the focal length of the first sub-lens group, and fi designates the focal length of the entire the macro lens system when focusing on an object at infinity.
First Claim
Other Claims data not available
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- G02B Class
- 11.27 % this patent is cited more than
- 10 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 7, 2026 |
