Motion picture camera with a built in color conversion filter

A motion picture camera capable of selectively using a first type film cartridge containing an artificial light type film and presenting on one part a mark, indicating that the contained film is of the artificial light type and a second type film cartridge containing a daylight type film but presenting no such mark comprising:

• a cartridge loading chamber in which the first type and the second type cartridges can be loaded;
• a filter means for adapting the artificial light type film to the photography under the daylight, said filter means being shiftable between a first position inserted into the photographic optical path of the camera and a second position retracted from the photographic optical path of the camera by changing over operation;
• an exposure device for determining the exposure value of the film;
• an adjusting means for adjusting the sensitivity of the exposure device, said adjusting means being changeable between a first state in which the adjusting means adjusts the sensitivity of the exposure device suitable for the daylight photography with the artificial light type film and a second state in which the adjusting means adjusts the sensitivity of the exposure device suitable for the artificial light photography with the artificial light type film by changing over operation;
• an operation means manually operable from outside of the camera for changing over the filter means and the adjusting means, said operation means operatively associated with the filter means and the adjusting means;
• a detecting means for detecting the type of the film cartridge loaded in the cartridge loading chamber, said detecting means detecting the existence of the mark on the film cartridge loaded into the cartridge loading chamber and being compulsorily displaced when the film cartridge loaded into the cartridge loading chamber is the second type film cartridge;
• and
• a cooperating means for compulsorily setting the filter means to the second position and the adjusting means to the first state respectively, said cooperating means being operatively associated with the detecting means so as to set the filter means to the second position and the adjusting means to the first state when the detecting means detects the second type film cartridge, whereby when the daylight type film is used, the effect of the operation means is made ineffective and the sensitivity of the exposure device is compulsorily adjusted to be suitable for daylight photography with the artificial light type film.

A motion picture camera capable of selectively using a first type film cartridge containing an artificial light type film and presenting on one part a mark indicating that the contained film is of the artificial light type and a second type film cartridge containing a daylight type film but presenting no such mark, comprising:

• a cartridge loading chamber in which the first type and the second type cartridges can be loaded;
• a filter means for adapting the artificial light type film to the photography under the daylight, said filter means shiftable between a first position inserted into the photographic optical path of the camera and a second position removed from the photographic optical path of the camera by changing over operation;
• an exposure device for determining the exposure value of the film;
• an adjusting means for adjusting the sensitivity of the exposure device, said adjusting means being changeable between a first state in which the adjusting means adjusts the sensitivity of the exposure device suitable for the daylight photography with the artificial light type film and a second state in which the adjusting means adjusts the sensitivity of the exposure device suitable for the artificial light photography with the artificial light type film by changing over operation;
• an urging means for urging the adjusting means toward the second state, said urging means operatively connected with the adjusting means;
• a manually operable means for setting and keeping the adjusting means to the first state against the urging force of the urging means, the adjusting means being changeable to the second state by the urging force of the urging means when the setting to the first state by the operable means is released;
• an engaging means for changing over the filter means between the first and the second positions, said engaging means being operatively connected with the filter means and at the same time operatively associated with the operable means, and functionally engaged with the operable means so as to change over the filter means from the first position to the second position when the operable means releases the setting of the adjusting means to the first state;
• a detecting means for detecting the type of film cartridge loaded into the film cartridge loading chamber, said detecting means being capable of detecting the existence of the mark of the film cartridge loaded into the film cartridge loading chamber and operatively associated with the engaging means so as to be capable of changing over the filter means to the second position by actuating the engaging means in case the second type film cartridge is detected, independently of the operable means;
• a holding means capable of holding the adjusting means to the first state against the urging force of the urging means independently of the operable means, said holding means being operatively connected with the detecting means so as to compulsorily set and keep the adjusting means to the first state in case the detecting means detects the second type film cartridge, whereby when the daylight type film is used, the effect of the operable means is made ineffective and the sensitivity of the exposure device is compulsorily adjusted to be suitable for daylight photography with the artificial light film.

A motion picture camera capable of selectively using a first type film cartridge containing an artificial light type film and presenting on one part a mark indicating that the contained film is of the artificial light type and a second type film cartridge containing a daylight type film but presenting no such mark, comprising:

• a cartridge loading chamber into which the first type and the second type cartridges can be loaded;
• a first filter means for adapting the artificial light type film to the photography under the daylight, said first filter means being shiftable between a first position inserted into a photographic optical path of the camera and the second position removed from the photographic optical path of the camera by changing over the operation;
• an exposure device for determining the value of the exposure of the film, said exposure device including a light sensing means for the exposure measurement;
• a second filter means for adjusting the sensitivity of the exposure device, said second filter means being shiftable between a first position inserted into the optical path of the light sensing means so as to adapt the sensitivity of the exposure device to the used state of the artificial light type film to the photography under the daylight and a second position removed from the optical path of the light sensing means so as to adapt the sensitivity of the exposure device to the used state of the artificial light type film to the photography under the artificial light by changing over operation;
• an operation means manually operable from outside of the camera for changing over the first and the second filter means, said operation means being operatively associated with the first and the second filter means;
• a detecting means for detecting the type of the film cartridge loaded into the film cartridge loading chamber, said detecting means detecting the existence of the mark on the film cartridge loaded into the cartridge loading chamber and being compulsorily displaced only when the film cartridge loaded into the cartridge loading chamber is the second type film cartridge;
• and
• an engaging means compulsorily setting the first filter means to the second position and the second filter means to the first position, said engaging means being operatively associated with the detecting means so as to compulsorily set and keep the first filter means to the second position and the second filter means to the first position when the detecting means detects the second type film cartridge, whereby when the daylight type film is used, the effect of the operation means is made ineffective and the sensitivity of the exposure device is compulsorily adjusted to be suitable for daylight photography with the artificial light film.

A motion picture camera capable of selectively using a first type film cartridge containing an artificial light type film and presenting on one part a mark indicating that the contained film is of the artificial light type and a second type film cartridge containing a daylight type film but presenting no such mark, comprising:

• a cartridge loading chamber into which the first type and the second type cartridges can be loaded;
• a first filter means for adapting the artificial light type film to the photography under the daylight, said first filter means being shiftable between a first position inserted into the photographic optical path of the camera and a second position removed from the photographic optical path of the camera by changing over operation;
• an exposure device for determining the value of the exposure of the film, said exposure device including a light sensing means for the exposure measurement;
• a second filter means for adjusting the sensitivity of the exposure device, said second filter means being shiftable between a first position inserted into the optical path of the light sensing means so as to adapt the sensitivity of the exposure device to the used state of the artificial light type film to the photography under the daylight and a second position removed from the optical path of the light sensing means so as to adapt the sensitivity of the exposure device to the used state of the artificial light type film to the photography under the artificial light by changing over operation;
• an urging means for urging the second filter means toward the second position, said urging means being operatively connected with the second filter means;
• a manually operable means for setting and keeping the second filter means to the first position against the urging force of the urging means, the second filter means being shiftable to the second position by the urging force of the urging means in case the setting to the first position by said operable means is released;
• an engaging means for changing over the first filter means between the first and the second positions, said engaging means being operatively connected with the first filter means and at the same time operatively associated with the operable means so as to change over the first filter means from the first position to the second position when the setting of the second filter means to the first position by means of the operable means is released;
• a detecting means for detecting the type of the film cartridge loaded into the film cartridge loading chamber, said detecting means being capable of detecting the existence of the mark on the outer wall of the film cartridge loaded into the film cartridge loading chamber and at the same time operatively associated with the engaging means so as to change over the first filter means to the second position independently of the operable means by actuating the engaging member when the second type film cartridge is detected;
• and
• a holding means for holding the second filter means to the first position independently of the operable means against the urging force of the urging means, said holding means being operatively connected with the detecting means so as to compulsorily set the second filter means to the first position when the detecting means detects the second type film cartridge;
• whereby when the daylight type film is used, the effect of the operation means is made ineffective and the sensitivity of the exposure device is compulsorily adjusted suitable for the daylight photography with the artificial light type film.