摘要:
A film feed control apparatus generates an output signal for instructing the rewinding of the film when a wind operation for a frame of a film is stopped before it is completed and the number of exposed frames has exceeded a nominal number of exposures. The film feed control apparatus stops the power supply to a wind motor when the wind operation is stopped before the number of exposed frames reaches the nominal number of exposures.
摘要:
Apparatus for detecting code indicia containing electrically conductive contacts and being indicative of one or more characteristics of the film contained in the film cartridge, comprises a wall member forming a chamber for receiving the cartridge. The wall member has through-holes provided at positions opposed to the code indicia. The apparatus is further provided with a circuit substrate disposed on the side opposite to the chamber and opposed to the wall member and having thereon an electric circuit means for reading the characteristics of the film. The circuit substrate has electric terminals. The apparatus further includes electrically conductive contact members being slide-movably inserted into the respective through-holes on the wall member. Each of the contact members has two ends one of which contacts with one of the code indicia and the other end contacts with one of the electric terminals.
摘要:
A simplified multi-light measuring device in a photographic system capable of measuring an object field divided into plural areas. The device comprises register means (e.g. 100-500) comprising plural registers for storing plural photoelectric output signals from the plural areas as digital data; reference output generating means (e.g. 60) for generating a reference output signal for determining digital data to be stored in the register means; comparator means (e.g. 21-25) for comparing each of the plural photoelectric output signals with the reference output signal and providing a corresponding output signal; and retaining means for retaining, in response to the output signal from the comparator means, digital data stored in a corresponding register of the register means.
摘要:
In an electroflash unit attachable to a camera provided with a circuit for measuring light transmitted through a photographing lens, a signal by which TTL flash output control circuit on the camera's side can be actuated is generated. The electroflash unit comprises;(1) a terminal for connection to the camera(2) a circuit for effecting flashing(3) a circuit for terminating said flashing in accordance with the output from said light measuring circuit on the camera and(4) a circuit for generating, on said terminal, a predetermined signal by which said light measuring circuit is brought into the state ready for operation.
摘要:
The number of terminals between a camera and an attachment can be reduced by a new combination of camera and attachment. The combination comprises first and second terminals for connecting the attachment to the camera; an information signal generating circuit on either one of the camera or the attachment for generating in time series first and second information signals and for transmitting said first and second signals to the other one through the first terminal; first and second responding circuits on the other one and operable in response to the first and second information signals respectively; a switchover signal generating circuit provided on the one for generating a switchover signal and for transmitting the signal to the other one through the second terminal; and a switchover circuit for transmitting the first and second information signals coming through the first terminal to the first and second responding circuits selectively in accordance with the switchover signal coming through the second terminal.
摘要:
An electric wind-up device for driving a film feed mechanism in a camera after exposure comprises wind-up terminating means for detecting an increase in resistance in the film feed mechanism to stop rotation of a motor when the film has been wound up by one frame or completely drawn out of a magazine, and counter means for counting the exposed frames and generating a count signal when a predetermined number of frames are counted. The wind-up device further comprises means co-operating with the counter means for outputting a motor energizing signal after exposure. The co-operating means outputs the motor energizing signal even when the count signal is not energized.
摘要:
A film sensitivity setting device for camera is provided with a circuit board comprising a first information unit with a conductor pattern which detects the film sensitivity information signal from a film cartridge having such signal and corresponds to the information signal of the manually set film sensitivity, and a second information unit with a conductor pattern for transmitting the detected information signal, wherein the exposure of the film is controlled according to the information signal obtained by electrical contact with the conductor pattern of either the first or the second information unit.
摘要:
In a camera having a stop drive mechanism adapted to be driven by an electric motor to vary a stop aperture and a film wind-up mechanism adapted to be driven by the electric motor to wind up a film, the electric motor is rotated to drive the stop drive mechanism before exposure of the film, and it is also rotated to drive the film wind-up mechanism after the exposure of the film. The rotating speeds of the electric motor in the first rotation to drive the stop drive mechanism and in the second rotation to drive the film wind-up mechanism are independently variable.
摘要:
A light measuring apparatus for camera is disclosed. It is known that some type of light measuring apparatus for camera involves the problem of so-called "latch" which is caused by opposite charge accumulated at the high impedance location in the light measuring circuit. The light measuring apparatus is provided with means for cancelling the latch in a simple and reliable manner.
摘要:
A photographing camera used with a film magazine device includes a film feed means and a first driving source for driving said feed means. The film magazine device includes means for taking up the film from said feed means and a second driving source for driving said take-up means the driving time required for said first driving source to feed a definite amount of film changes in accordance with a function as represented by a rectangular hyperbola relative to the output voltage of power supply means for said first and second driving sources. Apparatus for controlling said second driving source comprises drive control means for controlling the driving time of said second driving source so as to drive it for a time shorter than the driving time of said first one by a nearly constant time. The drive control means includes means for changing the driving time of said second driving source in approximation to a function as represented by another rectangular hyperbola.