An electronic device includes setting means configured to set a predetermined function related to control of the electronic device and capable of being performed regardless of an orientation of the electronic device, orientation detection means configured to detect the orientation of the electronic device, and control means configured to perform control such that in a case where the orientation detection means detects that the electronic device is in a first orientation, a first display is given on display means to prompt to set the predetermined function depending on a setting state of the predetermined function wherein the first display includes a display item for instructing to set the predetermined function by a user operation, and in a case where the orientation detection means detects that the electronic device is in a second orientation different from the first orientation, the first display is not given.

Provided is a finder device capable of preventing dust on a display surface of a display element and reducing an influence of heat which is generated from the display element on an optical system.

An EVF 1 includes: an optical system 20 that includes a display element 10, a first lens group G1 disposed in order from the display element 10 side, and a second lens group G2; a first holding frame 30 that holds the display element 10 and the first lens group G1 to seal a space between the display element 10 and the first lens group G1; a second holding frame that holds the second lens group G2; and a diopter adjustment unit 50 that adjusts a diopter by integrally moving the display element 10 and the first lens group G1 relative to the second lens group G2.

Provided is a finder device capable of preventing dust on a display surface of a display element and reducing an influence of heat which is generated from the display element on an optical system.

An EVF 1 includes: an optical system 20 that includes a display element 10, a first lens group G1 disposed in order from the display element 10 side, and a second lens group G2; a first holding frame 30 that holds the display element 10 and the first lens group G1 to seal a space between the display element 10 and the first lens group G1; a second holding frame that holds the second lens group G2; and a diopter adjustment unit 50 that adjusts a diopter by integrally moving the display element 10 and the first lens group G1 relative to the second lens group G2.

An observation apparatus includes an observation optical system and a line of sight detection system. The observation optical system includes, in order from a display element side to an observation side, an optical path splitter configured to split an optical path, and a first lens unit having a positive refractive power. The line of sight detection system includes a second lens unit configured to image light incident on the first lens unit and split by the optical path splitter. A predetermined condition is satisfied.

An observation apparatus includes an observation optical system and a line of sight detection system. The observation optical system includes, in order from a display element side to an observation side, an optical path splitter configured to split an optical path, and a first lens unit having a positive refractive power. The line of sight detection system includes a second lens unit configured to image light incident on the first lens unit and split by the optical path splitter. A predetermined condition is satisfied.

Provided are an imaging apparatus capable of maintaining favorable visibility of display in a finder, a finder display control method of the imaging apparatus, a finder display control program of the imaging apparatus, and a viewfinder. The viewfinder (30) includes an observation optical system (32), a finder LCD (36), a beam splitter (34) that superimposes display of the finder LCD (36) on an optical image of a subject observed through the observation optical system (32), an electronic variable ND filter (40) that adjusts a light amount of the optical image of the subject incident into the beam splitter (34), a transmittance measurement unit (90) that measures the transmittance of the electronic variable ND filter (40) changing over time in a case where the transmittance of the electronic variable ND filter (40) is switched, and a finder LCD display control unit (110b) that controls the light amount of the display device in real time on the basis of the result of measurement of the transmittance measurement unit (90). The finder LCD display control unit (110b) controls the light amount of the finder LCD (36) so as to keep constant a light amount ratio of the optical image of the subject observed through the observation optical system (32) and the display of the finder LCD (36) superimposed on the optical image.

Provided are an imaging apparatus capable of maintaining favorable visibility of display in a finder, a finder display control method of the imaging apparatus, a finder display control program of the imaging apparatus, and a viewfinder. The viewfinder (30) includes an observation optical system (32), a finder LCD (36), a beam splitter (34) that superimposes display of the finder LCD (36) on an optical image of a subject observed through the observation optical system (32), an electronic variable ND filter (40) that adjusts a light amount of the optical image of the subject incident into the beam splitter (34), a transmittance measurement unit (90) that measures the transmittance of the electronic variable ND filter (40) changing over time in a case where the transmittance of the electronic variable ND filter (40) is switched, and a finder LCD display control unit (110b) that controls the light amount of the display device in real time on the basis of the result of measurement of the transmittance measurement unit (90). The finder LCD display control unit (110b) controls the light amount of the finder LCD (36) so as to keep constant a light amount ratio of the optical image of the subject observed through the observation optical system (32) and the display of the finder LCD (36) superimposed on the optical image.

An imaging element incorporates a memory and a processor. The memory stores image data obtained by imaging a subject at a first frame rate. The processor is configured to derive a degree of difference between first image data obtained as the image data by performing imaging and second image data that is obtained as the image data earlier than the first image data and stored in the storage portion, and perform processing of deciding at least one of the first image data or the second image data as the output image data in a case where the derived degree of difference is greater than or equal to a threshold value. The processor is configured to output the decided output image data at a second frame rate.

Systems and methods directed to a digital rangefinder camera are described. The digital rangefinder camera may include a viewfinder assembly configured to receive a first optical image from a first optical path and a focus ring movement detection assembly configured to detect an amount of movement associated with a focus ring of a lens attached to the digital rangefinder camera. A processing device may be configured to provide a movement signal indicative of the amount of movement associated with the focus ring to an actuator coupled to an optical element, where the actuator moves the optical element and displaces a second optical image from a second optical path directed toward an optical component in the viewfinder assembly. The optical component in the viewfinder assembly is configured to project the first optical image and the second optical image toward a single common viewing position when the first optical image and the second optical image coincide.

A finder apparatus according to a first aspect of the present invention includes an optical finder for observing an optical image of a subject using an eyepiece portion, a display device that displays information, a half mirror that is arranged on an optical path of the optical finder, an electronically variable ND filter that is inserted on a subject side from the half mirror on the optical path of the optical finder, a brightness information acquisition unit that acquires brightness information of external light, a brightness measurement unit that measures brightness of the incident external light, and a transmittance calculation unit that calculates transmittance of the electronically variable ND filter in real time based on the measured brightness and the acquired brightness information.