Enlargement photographing apparatus

An enlargement photographing system for changing a distance between a camera body and a photographing lens-barrel to perform enlargement photographing, comprising:

• first memory means provided within said camera body for storing therein information relating at least to said camera body;
• a fixed enlargement barrel electrically connected to said camera body;
• distance setting means provided on said fixed enlargement barrel for setting a desired distance;
• a moving enlargement barrel movable in an optical-axis direction with respect to said fixed enlargement barrel and having contacts at an end thereof to which contacts on said photographing lens barrel are electrically connected;
• second memory means provided within said photographing lens-barrel for storing therein information relating at least to said photographing lens-barrel;
• driving means for driving said moving enlargement barrel to a predetermined position based on an output from said distance setting means;
• feeding-quantity detecting means for detecting a quantity of feeding of said moving enlargement barrel, with respect to a predetermined reference position of said fixed enlargement barrel;
• third memory means provided on one of said fixed enlargement barrel and said moving enlargement barrel for storing therein minimum-reference-length information relating at least to said fixed enlargement barrel and said moving enlargement barrel;
• computing means for computing a photographing scale factor based on output information of said feeding-quantity detecting means and photographing information from said first, second and third memory means;
• and
• display means for displaying said photographing scale factor based on an output from said computing means.

An enlargement photographing system for changing a distance between a camera body and a photographing lens-barrel to perform enlargement photography, comprising:

• first memory means for storing therein information relating at least to said camera body and said photographing lens-barrel;
• a fixed enlargement barrel having contacts electrically connected to contacts on said camera body;
• distance setting means provided on said fixed lens-barrel for setting a desired distance;
• a moving enlargement barrel movable in an optical -axis direction with respect to said fixed enlargement barrel and having contacts on an end thereof to which contacts on said photographing lens-barrel are electrically connected;
• driving means for driving said moving enlargement barrel to a predetermined position based on an output from said distance setting means;
• feeding-quantity detecting means for detecting a quantity of feeding of said moving enlargement barrel, with respect to a predetermined reference position of said fixed enlargement barrel;
• second memory means provided on one of said fixed enlargement barrel and said moving enlargement barrel for storing therein minimum-reference-length information related at least to said fixed enlargement barrel and said moving enlargement barrel;
• computing means for computing a photographing scale factor based on output information of said feeding-quantity detecting means and information from said first and second memory means;
• and
• display means for displaying said photographing scale factor computed at least by said computing means.

A camera system for performing enlargement photographing, comprising:

• a photographing lens;
• a camera body;
• an intermediate barrel assembly mounted between said photographing lens and said camera body, and having a length thereof which is changeable in an optical-axis direction;
• means for outputting a photographing scale factor of a photographing optical system in accordance with length information relating to said intermediate barrel assembly, information of said photographing lens and information of said camera body;
• and
• means for electrically displaying said photographing scale factor.

A camera system for performing enlargement photographing, comprising:

• a photographing lens;
• a camera body;
• an intermediate barrel assembly mounted between said photographing lens and said camera body, and having a length thereof which is changeable in an optical-axis direction;
• means for outputting a photographing scale factor of a photographing optical system in accordance with length information relating to said intermediate barrel assembly, information of said photographing lens and information of said camera body;
• means for electrically displaying said photographing scale factor;
• and
• said means for displaying said photographing scale factor being arranged on said intermediate barrel assembly.

A camera system for performing enlargement photographing, comprising:

• a photographing lens;
• a camera body;
• an intermediate barrel assembly mounted between said photographing lens means and said camera body, and having a length thereof which is changeable in an optical-axis direction;
• means for outputting a photographing scale factor of a photographing optical system in accordance with length information relating to said intermediate barrel assembly, information of said photographing lens and information of said camera body;
• means for electrically displaying said photographing scale factor;
• and
• said means for outputting said photographing scale factor using length information of said intermediate barrel, information of said photographing lens and information of said camera body, to table-refer to said photographing scale factor employing a table look-up means.

A camera system for performing enlargement photographing, comprising:

• a photographing lens;
• a camera body;
• an intermediate barrel assembly mounted between said photographing lens and said camera body, and having a length thereof which is changeable in an optical-axis direction;
• means for outputting a photographing scale factor of a photographing optical system in accordance with length information relating to said intermediate barrel assembly, information of said photographing lens and information of said camera body;
• means for electrically displaying said photographing scale factor;
• and
• said display means displaying at least one of a length of said intermediate barrel, information relating to said photographing lens, information relating to said camera body and information relating to a subject in addition to said photographing scale factor.

A camera system for performing enlargement photographing, comprising:

• a photographing lens;
• a camera body;
• an intermediate barrel assembly mounted between said photographing lens means and said camera body, and having a length thereof which is changeable in an optical-axis direction;
• means for outputting a photographing scale factor of a photographing optical system in accordance with length information relating to said intermediate barrel assembly, information of said photographing lens and information of said camera body;
• means for electrically displaying said photographing scale factor;
• and
• said photographing lens including memory means for storing therein information relating to said photographing lens and wherein said camera body includes memory means for storing therein information relating to said camera body.

A camera system for performing enlargement photographing, comprising:

• a photographing lens;
• a camera body;
• an intermediate barrel assembly mounted between said photographing lens and said camera body, and having a length thereof which is changeable in an optical-axis direction;
• means for outputting a photographing scale factor of a photographing optical system in accordance with length information relating to said intermediate barrel assembly, information of said photographing lens and information of said camera body;
• means for electrically displaying said photographing scale factor;
• and
• information relating to said photographing lenses being a focal length of said photographing lens, a distance from a lens mount of said photographing lens to a lens principal point, and a distance from the lens principal point to a forward end of a lens frame, and wherein information relating to said camera body is a distance from a film surface to a body mount.

An intermediate barrel assembly mounted between a photographing optical system and a camera body in order to perform enlargement photographing, comprising:

• a barrel assembly having a length which is adjustable in an optical-axis direction;
• a motor;
• driving means for driving said barrel assembly by a driving force of said motor;
• setting means for manually setting a photographing scale factor;
• and
• control means for controlling said driving means such that a photographing scale factor of the photographing optical system is coincident with said set photographing scale factor.

An enlargement photographing apparatus having distance changing means which is extendable and retractable in an optical-axis direction to change a distance between photographing lens means and a camera body, said enlargement photographing apparatus comprising:

• setting means capable of setting one of a photographing scale factor and a distance from a forward end of said photographing lens means to a subject to be photographed;
• computing means for computing a quantity of feeding of said length changing means based on photographing-lens information and camera-body information relating to said photographing lens means and said camera body connected to said enlargement photographing apparatus, reference-length information relating to said distance changing means which is provided on said enlargement photographing apparatus, and output information of said setting means;
• moving-quantity measuring means for measuring a quantity of feeding of said distance changing means;
• and
• driving control means for controlling, in driving, a quantity of feeding of said distance changing means based on an output from said computing means and said moving-quantity measuring means.

An enlargement photographing apparatus having distance changing means extendable and retractable in an optical-axis direction for changing a distance between photographing lens means and a camera body, said enlargement photographing apparatus comprising:

• photographing-scale-factor setting means capable of setting a photographing scale factor;
• information storing means for storing therein a plurality of information relating to the camera body and the photographing lens means connected to said enlargement photographing apparatus and a plurality of reference-length information relating to the distance changing means which is provided on said enlargement photographing apparatus;
• computing means for computing a quantity of feeding of said length changing means based on information relating to the camera body and the photographing lens means connected to said enlargement photographing apparatus, reference-length information relating to said distance changing means which is provided on said enlargement photographing apparatus, and output information relating to said photographing scale-factor setting means;
• and
• means for indicating a photographing lens means suited for a set photographing scale factor based on an output from said computing means and said information memory means.

An intermediate barrel assembly mounted between a photographing optical system and a camera body in order to perform enlargement photographing, comprising:

• a barrel assembly having a length which is adjustable in an optical-axis direction;
• a motor;
• driving means for driving said barrel assembly by a driving force of said motor;
• setting means for manually setting a photographing scale factor;
• and
• control means responsive to said setting means and information from said photographing optical system and said camera for controlling said driving means such that a photographing scale factor of the photographing optical system is coincident with a setting of a photographing scale factor.

A camera system for performing enlargement photographing, comprising:

• a photographing assembly;
• a camera body;
• an intermediate lens-barrel mounted between said photographing lens assembly and said camera body, and having a length thereof which is changed in an optical-axis direction;
• calculating means for calculating a photographing scale factor of a photographing optical system based on information of a length of said intermediate lens-barrel, information of said photographing lens assembly, and information of said camera body, said calculating means provided in said intermediate lens-barrel;
• and
• display means for electrically displaying said photographing scale factor which was calculated, said display means provided in said intermediate lens barrel.

An enlargement photographing apparatus mounted between a photographing lens assembly and a camera body, comprising:

• information input means for inputting information relating to said photographing lens assembly;
• extending/retracting state detecting means for detecting an extending/retracting state in an optical-axis direction of said enlargement photographing apparatus;
• computing means for computing a photographing scale factor from said information input means and an output of said extending/retracting state detecting means;
• and
• display means for displaying a computed photographing scale factor.

A camera system for performing enlargement photographing, comprising:

• a camera body;
• a plurality of photographing lenses each having different optical characteristics and selectively usable with said camera body;
• an intermediate lens-barrel mounted between one of said photographing lenses and said camera body, and having a length thereof which is changed in an optical-axis direction;
• calculating means for calculating a photographing scale factor of a photographing optical system based on information of a length of said intermediate lens-barrel, information of that one of said photographing lenses mounted on said intermediate lens-barrel, and information of said camera body, said calculating means provided in said intermediate lens-barrel;
• and
• display means for electrically displaying said photographing scale factor which was calculated, said display means provided in said intermediate lens barrel.