Apparatus for converting interchangeable camera lens from manual into autofocus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 15, 1987
Grant Date -
N/A
app pub date -
Dec 12, 1986
filing date -
Dec 14, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus (X) for converting a manual focus interchangeable lens having an associated focal length into an autofocus type lens for use with a microprocessor based autofocus single lens reflex camera (Y) for providing autofocus photography with the manual focus interchangeable lens includes a lens data conversion and output circuit (SC, MP, 17) which converts data concerning the aperture values of the lens into a serial bit pattern representation of the full/minimum aperture value lens characteristics based on the detected minimum aperture value (S.sub.1, S.sub.2) and number of stages of aperture values (S.sub.3, S.sub.4, S.sub.5) for the lens. The converter (X) enables a manual focus lens having a different mount (1, 7) than the camera to be mechanically and electrically coupled to the camera to permit autofocus photography. Digital encoders (19) may be employed with the aperture control ring to detect the minimum aperture value and associated number of stages for the lens.
First Claim
Family
International Classification(s)
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