Macro-focussing rear converter lens
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 28, 1984
Grant Date -
N/A
app pub date -
Jul 13, 1982
filing date -
Feb 25, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A macro-focusing rear converter lens system adapted to be inserted between a camera body and a master lens assembly comprises a cylindrical main body which is mounted on the camera body. A rear converter lens assembly for elongating the focal length of the master lens is mounted in fixed relation on the camera body. The master lens assembly is mounted on the front end of a tube which is fitted coaxially within the main body and is movably axially by means of a helicoidal threaded rotatable ring interposed between the main body and the tube on which the master lens assembly is mounted. The interval between the camera body and the master lens assembly can thus be varied by rotating the rotatable ring. A leverage system in the main body transmits an F number signal from the master lens system to the camera body.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully