Camera system, camera body, interchangeable lens unit, and imaging method

A camera body that is used in a camera system with an interchangeable lens unit that comprises an imaging optical system that has an aperture and focuses light from a subject, and an aperture setting unit that adjusts said aperture and sets the aperture value of said imaging optical system, the camera body comprising:

• an imaging unit for converting the light from said imaging optical system into an electrical signal to obtain an image taken;
• an observing optical system for observing the light from said imaging optical system;
• a movable mirror that is arranged between said imaging optical system and said imaging unit, and is able to be in a first position for leading the light from said imaging optical system to said observing optical system, and a second position for leading the light from said imaging optical system to said imaging unit;
• a photographing mode switching unit that switches between a first photographing mode in which an image is taken with the position of said movable mirror being arranged in said first position, and a second photographing mode in which an image is taken with the position of said movable mirror being arranged in said second position;
• a depth-of-field preview mode setting unit in which information for setting the mode to a depth-of-field preview mode is inputted;
• an image display unit that comprises a display region including a first display region and a second display region, and displays an image taken that is obtained at said imaging unit on said display region;
• and
• an image recording unit that records said image taken;
• wherein, said image display unit displays a first image taken that is obtained by said imaging unit on said first display region in the case that said aperture value is set to be a first aperture value by said aperture setting unit, and displays a second image taken that is obtained by said imaging unit on said second display region in the case that said aperture value is set in a second aperture value by said aperture setting unit, and by doing so, displays both said first image taken and said second image taken on said display region, and
• said image recording unit records said first image taken and said second image taken.

An interchangeable lens unit, comprising:

• an imaging optical system that has an aperture, and focuses the light from a subject;
• and
• an aperture setting unit that adjusts said aperture and sets the aperture value of said imaging optical system;
• wherein, the interchangeable lens unit is used in a camera system with a camera body that comprises an imaging unit for converting the light from the imaging optical system into an electrical signal to obtain an image taken;
• an observing optical system for observing the light from said imaging optical system;
• a movable mirror that is arranged between said imaging optical system and said imaging unit, and is able to be in a first position for leading the light from said imaging optical system to said observing optical system, and a second position for leading the light from said imaging optical system to said imaging unit;
• a photographing mode switching unit that switches between a first photographing mode in which an image is taken with the position of said movable mirror being arranged in said first position, and a second photographing mode in which an image is taken with the position of said movable mirror being arranged in said second position;
• a depth-of-field preview mode setting unit in which information for setting the mode to a depth-of-field preview mode is inputted;
• an image display unit that comprises a display region including a first display region and a second display region, and displays an image taken that is obtained at said imaging unit on said display region;
• and an image recording unit that records said image taken.

An imaging method in a camera system that comprises an imaging optical system that has an aperture and focuses the light from a subject, an imaging unit for converting the light from said imaging optical system into an electrical signal to obtain an image taken, an image display unit that comprises a display region including a first display region and a second display region and displays an image taken that is obtained at said imaging unit on said display region, and an aperture setting unit that adjusts said aperture and sets the aperture value of said imaging optical system, the imaging method comprising:

• (A) converting the light from said imaging optical system into an electrical signal and obtaining an image taken;
• (B) displaying the image taken obtained at step (A) on said display region;
• and
• (C) adjusting said aperture and setting the aperture value of said imaging optical system is set;
• wherein, in step (B), a first image taken that is obtained by step (A) is displayed on said first display region in the case that said aperture value is set to be a first aperture value by step (C), and a second image taken that is obtained by step (A) is displayed on said second display region in the case that said aperture value is set in a second aperture value by step (C), and by doing so, both said first image taken and said second image taken are displayed on said display region.