JP2002014405A - Lens adapter for electronic camera and electronic camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic camera used in a state such that a photographing optical system such as an interchangeable lens for a 35 mm single lens reflex camera is mounted. SOLUTION: Since an object image formed on a CCD imaging device 17 is inverted up and down and right and left in the case of using the electronic camera in the state where the interchangeable lens is mounted, a select dial 33 is operated to perform photographing in an interchangeable lens mode. When the camera is set to the interchangeable lens mode, the subject image picked up by the device 17 is inverted up and down and right and left by an image processing CPU 46, so that the erect subject image is displayed on an LCD monitor 36 and the image data of the erect subject image is recorded on a PC card 54.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens adapter for an electronic camera which allows an electronic camera to be equipped with an additional photographing optical system such as an interchangeable lens for a still camera, and an electronic camera which can use the additional photographing optical system. About the camera.

[0002]

2. Description of the Related Art Conventionally, there has been known an electronic still camera (hereinafter, referred to as a DSC) that captures a subject image by a CCD image sensor or the like and records the captured image data. In such a DSC, an image signal from a CCD image pickup device is subjected to predetermined image processing such as white balance and gamma correction, and then the data after the image processing is compressed by a predetermined method such as JPEG and used in a flash memory or the like. Recorded on a recording medium.

[0003]

By the way, in a 35 mm single-lens reflex camera using a conventional silver halide film, various interchangeable lenses are commercially available as photographing lenses, and by selectively using them according to the purpose of photographing, Effective shooting can be performed. However, these interchangeable lenses cannot be used in a DSC in which a camera body and a taking lens are integrally formed.

An object of the present invention is to provide a lens adapter which allows an additional photographing optical system to be attached to an electronic camera, and an electronic camera which can use the additional photographing optical system by using the lens adapter. Is to do.

[0005]

An embodiment of the present invention will be described with reference to FIGS. 1, 3 and 5. FIG. (1) When described in association with FIG. 1, the invention according to claim 1 captures an image signal by capturing a first imaging optical system 15 and a subject image 18 incident through the first imaging optical system 15. A lens adapter 2 for mounting the second photographing optical system 3 to the electronic camera 1 having an image pickup device 17 for outputting, which has a positive refractive power and emits light from the second photographing optical system 3. The above-mentioned object is achieved by incorporating the optical systems 10 and 11 for making the subject image 13 incident on the first photographing optical system 15. (2) To be described in association with FIG. 1, FIG. 3 and FIG.
The invention according to claim 2 includes an image sensor 17 that captures a subject image 18 and outputs an image signal, and a first imaging optical system 15 that forms the subject image 18 on an imaging surface of the image sensor 17,
A first photographing mode applied to the electronic camera 1 to which a second photographing optical system 3 different from the first photographing optical system 15 can be additionally attached, and photographing with the second photographing optical system 3 attached, Selecting means 33 for selecting a second photographing mode for photographing without mounting the photographing optical system 3 of the subject, and a subject image 2 photographed in the second photographing mode when the direction of the subject image 18 photographed in the first photographing mode is changed.
A converting means 46 for converting the image signal so as to match the direction of 0, and a recording means for recording the converted signal on the recording medium 54 when the first photographing mode is selected by the selecting means 33. 49 to achieve the above object. (3) The electronic camera according to (2), wherein the focus adjustment device (4) drives the first photographing optical system (15) to focus the subject image on the imaging surface of the imaging element (17).
0, 41 and when the first shooting mode is selected,
Prohibiting means 49 for prohibiting the focusing operation by the focus adjusting devices 40 and 41. (4) In the electronic camera according to the second aspect of the present invention, in the electronic camera according to the second aspect, the first adjustment optical system 15 is driven to focus the subject image on the imaging surface of the imaging element 17.
0, 41 and when the first shooting mode is selected,
And a restricting means 49 for restricting an image plane moving range in a focusing operation by the focus adjusting devices 40 and 41. (5) The electronic camera according to any one of claims 2 to 4, wherein the first photographing optical system 15 is a zoom optical system, and when the first photographing mode is selected, The zoom optical system 15 further includes zoom range limiting means 49 for limiting the zoom range of the zoom optical system 15. (6) According to a sixth aspect of the present invention, in the electronic camera according to any one of the second to fifth aspects, the second photographing optical system 3 is mounted via the lens adapter 2 according to the first aspect. It is. (7) The invention according to claim 7 is the electronic camera according to any one of claims 2 to 6, wherein the conversion means 46 includes the image sensor 1
The vertical and horizontal inversion of the image signal output from 7 is inverted.

In the section of the means for solving the above-mentioned problems, which explains the configuration of the present invention, the drawings of the embodiments of the present invention are used to make the present invention easier to understand. However, the present invention is not limited to the embodiment.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view illustrating a lens adapter according to the present invention.
FIG. DSC1 for lens adapter 2
And a lens mount section 5 to which the single-lens reflex interchangeable lens 3 is mounted. The lens mount portion 5 has a mounting structure corresponding to the structure of the mounting portion of the interchangeable lens 3, and has, for example, a bayonet mount structure. Therefore, any compatible interchangeable lens can be mounted on the lens mount 5.

FIG. 2 shows a DSC mounting portion 4 of the lens adapter 2.
In the present embodiment, the lens adapter 2 is mounted on the DSC 1 by fixing the DSC mounting section 4 to the mounting section 6 provided on the body of the DSC 1. A female screw portion 7 is formed on the inner peripheral surface of the mounting portion 6. A male screw portion 8 formed on the DSC mounting portion 4 is screwed into the female screw portion 7 to attach the lens adapter 2 to the DSC 1. The photographing lens 15 of the DSC 1 shown in FIG. 1 constitutes a zoom optical system, and when a zoom operation is performed, the lens barrel 1 in the lens adapter 2 attached to the mounting unit 6
2 moves in the optical axis direction.

Reference numeral 9 denotes a switch for detecting whether or not the lens adapter 2 is mounted on the mounting section 6 of the DSC 1, and whether the lens adapter 2 is mounted or not can be determined by turning on and off the switch 9. When the lens adapter 2 is mounted on the mounting section 6,
The contact 9a of the switch 9 is driven rightward in the figure by the end face of the DSC mounting section 4, and the switch 9
A signal is transmitted to 49.

As shown in FIG. 1, the lens adapter 2 is provided with two convex lenses 10 and 11. Reference numeral 13 denotes a subject image formed by the interchangeable lens optical system 14, which is an image obtained by inverting the subject 16 vertically and horizontally. The imaging position of the subject image 13 is
This corresponds to the film surface position when the interchangeable lens 3 is mounted on a single-lens reflex camera. The convex lens 10 is disposed near the image forming position of the subject image 13 and has a field lens function. Therefore, the light beam from the interchangeable lens 3 effectively enters the DSC 1.

As described above, the subject light is imaged on the primary image forming plane by the interchangeable lens optical system 14, and an image 13 whose top, bottom, left and right are inverted with respect to the subject 16 is formed. The image 13 is an optical system having a positive refractive power (convex lenses 10, 1).
After passing through 1), the photographing lens 15 of the DSC 1
An image is formed on the imaging surface of the CD imaging device 17. Reference numeral 18 denotes an image formed by the photographing lens 15. In the DSC 1 of the present embodiment, the image 13 is inverted up and down and left and right, and becomes an erect image with respect to the subject 16. I have. On the other hand, as shown in FIG. 3, in a normal use method in which the lens adapter 2 and the interchangeable lens 3 are not attached to the DSC 1, the subject 16
Is formed upside down and left and right.

As described above, when the lens adapter 2 and the interchangeable lens 3 are mounted on the DSC 1, an image obtained by inverting the image up and down and left and right with respect to the image when the lens adapter 2 is not mounted is captured by the CCD image sensor 17. Therefore, in the DSC 1 according to the present invention, the image data obtained from the CCD image pickup device 17 is electronically converted so that the image direction is inverted vertically and horizontally, and the upright image is displayed on the LCD monitor of the DSC 1 and the recording medium is recorded. Was recorded.

Next, the DSC 1 will be described. 4A and 4B are views showing the appearance of the DSC 1, wherein FIG. 4A is a plan view of the DSC 1 as viewed from above, and FIG. 4B is a view of the DSC 1 as viewed from the back. In FIG. 4A, 30 is an exposure mode,
This is an external display panel for displaying a photometry mode, the number of shot frames, a battery state, and the like. The ring-shaped power switch 32 is provided so as to surround the release button 31. When the power switch 32 is rotated clockwise from the power-off state shown in FIG.

Reference numeral 33 denotes a select dial for switching the photographing mode. When the lens adapter 2 and the interchangeable lens 3 are used as shown in FIG. 1, the select dial 33 is rotated to set an asterisk (★) mark 34. Match the position of the mark 35. On the other hand, in a normal use where the interchangeable lens 3 is not used, the select dial 33 is used in a position other than the mark 34. Hereinafter, the case where the mark 34 is selected is referred to as an interchangeable lens mode, and the other case is referred to as a normal mode. When the DSC 1 is used alone without the lens adapter 2 and the interchangeable lens 3 as shown in FIG. 3, shooting is performed in the normal mode. On the other hand, when the lens adapter 2 and the interchangeable lens 3 are mounted and used as shown in FIG. 1, photographing is performed in the interchangeable lens mode.

Further, the DSC 1 is provided with a mode changeover switch (not shown) for switching between a photographing mode and a reproducing mode.
A real-time image (called a through image) captured by the imaging element 17 is displayed on the LCD monitor 36. Then, when the release button 31 is fully pressed and a shooting operation is performed, the shot image is displayed on the LCD monitor 36 as a frozen image for several seconds, while in the playback mode, the shot image is already shot and recorded on the recording medium. Image is L
It is displayed on the CD monitor 36. 37 is a viewfinder, 3
Reference numeral 9 denotes a zoom switch. When the W side of the zoom switch 39 is pushed, the photographing lens 15 (see FIG. 1) is driven to the wide angle side, and when the T side of the switch 39 is pushed, it is driven to the telephoto side.

FIG. 6 is a flowchart showing the outline of the photographing operation. When the power switch 32 is turned on, the process starts. The detailed operation procedure will be described later. Step S1 is a step of judging whether or not the DSC 1 is set to the normal mode. If the normal mode is set and the judgment is YES, the process proceeds to the step S3, and if the DSC 1 is set to the interchangeable lens mode and the judgment is NO. Step S
Proceed to 2.

When the process proceeds from step S1 to step S3, the image picked up by the CCD image pickup device 7 is displayed on the LCD monitor 36 as a through image. On the other hand, step S
If the process proceeds from step 1 to step S2, the image direction of the image data output from the CCD image sensor 7 is inverted vertically and horizontally, and then the process proceeds to step S3 where the inverted image is displayed as a through image on the LCD. It is displayed on the monitor 36. Step S4 is a step of determining whether or not the release button 31 has been fully pressed. If YES is determined, the process proceeds to step S5 to perform a photographing process. If NO is determined, the process returns to step S1. The following step S6 is a step for determining whether or not the normal mode has been set.
If the determination is YES, the process proceeds to step S8, and if the determination is NO, the process proceeds to step S7, and after performing the same inversion processing as step S2, proceeds to step S8. Step S8
Is a step of recording image data on a recording medium. After recording, the process returns to step S1.

In the above-described example, the photographer operates the select dial 33 to switch to the interchangeable lens mode.
The normal mode and the interchangeable lens mode may be automatically switched based on the OFF state.

FIG. 5 is a block diagram showing a schematic configuration of the DCS 1. Behind the taking lens 15, the CCD image pickup device 1
7 are arranged, and a subject image is formed on the imaging surface of the CCD imaging device 17. The focus adjustment state of the subject image is detected by the focus detection device 40, and the focus adjustment is performed by driving the photographing lens 15 by the lens driving device 41. The luminance of the subject is measured by the photometric device 42. The detailed focus adjustment operation will be described later.

Signal charges corresponding to the brightness of the subject image are accumulated in the CCD image pickup device 17 by photoelectric conversion, and the accumulated signal charges are read out as CCD output signals by a driver 43 for driving and controlling the CCD image pickup device 17. .
A CCD output signal from the CCD image sensor 17 is input to an analog signal processing circuit 44 including an AGC circuit and a CDS circuit, and is subjected to analog processing such as gain adjustment and noise removal. Converted to a signal.

The main CPU 49 is a CPU for controlling the entire DSC 1, and when a power switch 32 (see FIG. 4) provided on the DSC 1 is turned on, a control program of the main CPU 49 is started. The main CPU 49 receives a half-press signal and a full-press signal from a half-press switch 50 and a full-press switch 51 interlocked with the release button 31 (FIG. 4), respectively.

The image processing CPU 46 performs image pre-processing such as contour compensation and gamma correction and image inversion processing on the digitally converted signal, and includes digital processing circuits such as a luminance / color difference signal conversion circuit and a gamma correction circuit. , For example, A
It is configured as SIC. In addition, the driver 43,
The operation timing of the analog signal processing circuit 44, the A / D conversion circuit 45, and the image processing CPU 46 is controlled by a timing generator 48. Reference numeral 52 denotes a display image creation circuit for creating a captured monitor image to be displayed on the LCD monitor 36 from the image data after the image preprocessing.
A thinning process or the like is performed according to the display resolution of the monitor 36.

The compression circuit 53 is a circuit for compressing image data subjected to image pre-processing at a predetermined ratio, for example, performing a predetermined format process for JPEG compression. The image data that has undergone data compression is recorded on a recording medium (such as a PC card or CF card) 54 such as a flash memory. In the following, the recording medium 54 is referred to as P
Explanation will be given as a C card. Reference numeral 56 denotes a zoom driving device for performing a zoom operation of the photographing lens 15, and performs a zoom operation according to an operation of the zoom switch 39.

Next, the photographing operation of the DSC 1 will be described separately for an interchangeable lens mode using the lens adapter 2 and the interchangeable lens 3 and a normal mode not using them.

<< In the case of the normal mode >> When the lens adapter 2 and the interchangeable lens 3 are not used, the select dial 33 is operated to set the normal mode. When the power switch 32 shown in FIG. 5 is turned on, the focus detection device 40 constantly detects the focus adjustment state of the photographing lens 15 according to a command from the main CPU 49, and focuses the subject light on the imaging surface of the CCD imaging device 16. The photographing lens 15 is driven. At this time, the focus detection device 40 detects a focus adjustment state for a focus detection area provided at a predetermined position on the shooting screen, and based on the focus detection state from the focus detection area selected according to a predetermined algorithm. 1
5 is driven to the in-focus position.

The output signal of the CCD image sensor 17 is sent to an A / D conversion circuit 45 after passing through an analog signal processing circuit 44 and is converted into a digital signal. The digitally converted signal is temporarily stored in a buffer memory 47 after image processing such as gamma correction is performed by an image processing CPU 46.
Note that the image processing CPU 46 does not perform the image conversion processing for inverting the image vertically and horizontally in the normal mode. The image data once stored in the buffer memory 47 is read out by the image processing CPU 46, and a monitor display image is created and displayed on the LCD monitor 36. The monitor display image is sequentially updated at predetermined intervals by repeatedly performing the above-described series of operations.

Here, when the half-press switch 50 is operated and a half-press signal is input to the main CPU 49, the photometry device 42 performs photometry of the subject brightness by a command from the main CPU 49. Thereafter, when the release button is fully pressed and the full-press switch 51 is turned on, the signal charges accumulated in the CCD image sensor 17 are discharged, and the analog signal processing circuit 44 controls gain for analog image signals, noise removal, and the like. After the analog processing is performed, the signal is converted into a digital signal by the A / D conversion circuit 45.

The digitally converted signal is processed by an image processing CPU.
Image processing such as gamma correction is performed at 46, and is temporarily stored in the buffer memory 47. Thereafter, image data is exchanged between the main CPU 49 and the buffer memory 47, and
A white balance adjustment value is obtained from the stored image data. The white balance adjustment is performed by the image processing CPU 46 based on the obtained white balance adjustment value, and the image data after the white balance adjustment is stored in the buffer memory 47 again.

The image data stored in the buffer memory 47 undergoes data compression processing by the compression circuit 53 and is stored again in the buffer memory 47. When the image data is subjected to the data compression processing, the memory area occupied by the compressed image data in the buffer memory 47 is reduced, so that the buffer memory 47 can accept new image data. Attached to the image data subjected to the data compression are a predetermined data name and date / time data from the real-time clock 55 by the main CPU 49, and photographing information data recording photographing conditions such as a shutter speed and an aperture value at the time of photographing. Is done. The image data and the shooting information data are stored in the PC card 54 on which the DSC 1 is mounted.
Will be recorded.

<< Case of Interchangeable Lens Mode >> Next, the operation of the interchangeable lens mode using the lens adapter 2 and the interchangeable lens 3 will be described. In the following description of the operation, the operation different from the normal mode will be mainly described, and the description of the same operation will be omitted. First, when the lens adapter 2 and the interchangeable lens 3 are used, the mark 34 of the select dial 33 (see FIG.
In accordance with 5, DSC1 is set to the interchangeable lens mode. When the power switch 32 is turned on, the main CPU 4
9 by the focus detection device 40
Is constantly detected, and the photographing lens 15 is driven so that the subject light is focused on the imaging surface of the CCD imaging device 16.

If the focus adjustment state of the interchangeable lens 3 is changed, the focus adjustment state of the DSC 1 is changed accordingly. Further, since the subject image 13 shown in FIG. 1 is not located on the left side in the figure from the position of the joint between the interchangeable lens 3 and the lens adapter 2, if the interchangeable lens mode is set, the distance measurement distance during AF is reduced. The value may be limited to a value smaller than the front end surface distance of the lens adapter. Thereby, unnecessary AF operation during AF is omitted, and the AF operation can be performed more quickly.

As in the normal mode, the CCD image sensor 17
Output signal from the analog signal processing circuit 44 and the A / D
The signal is converted into a digital signal via the conversion circuit 45. In the interchangeable lens mode, this digital signal is transmitted to the image processing CPU 4.
In step 6, image processing such as gamma correction is performed, and image conversion processing for inverting the image vertically and horizontally is performed. The processed image data is temporarily stored in the buffer memory 47. The image data once stored in the buffer memory 47 is read out by the image processing
A thinning-out process or the like is performed according to the display resolution of the monitor 36 to create a monitor display image.

By the way, as described above, the interchangeable lens 3
Is mounted, the direction of the subject image 18 formed on the imaging surface of the CCD image sensor 17 is upside down, left and right with respect to the subject image 20 when not mounted (see FIG. 3). . However, when the mode is set to the interchangeable lens mode, the image picked up by the CCD image sensor 17 is turned upside down and left and right by the image processing CPU 46, so that an upright subject is displayed on the LCD monitor 36. .

Thereafter, the operations from the operation of the half-press switch 50 and the full-press switch 51 to the recording of the image data on the PC card 54 are the same as those in the normal mode described above. Image data of the erect image is recorded.

<< Additional Description Regarding AF Operation >> In the above description of the operation in the interchangeable lens mode, the case where the AF operation is always performed has been described. However, when the subject image 13 shown in FIG. 1 is largely moved in the optical axis direction. In particular, if the DSC 1 has moved to the right in the figure relative to the photographing lens 15 of the DSC 1, the DSC 1 cannot be focused by a normal focus adjustment operation. Therefore, when focusing cannot be performed on the DSC 1 side, the focus adjustment state is fixed at a predetermined position, for example, the position of the image 13 in FIG. 1, and a display prompting focusing on the interchangeable lens 3 side is displayed on the display device (the LCD monitor 36 or an external device). It is displayed on the display panel 30). In this case, the photographer operates the distance ring of the interchangeable lens 3 to perform focusing. Thereafter, the release button 31 is half-pressed and the half-press switch 5 is pressed.
When 0 is turned on, the AF operation on the DSC 1 side is restarted, and precise focusing is performed. Therefore, the focusing of the interchangeable lens 3 described above does not have to be strictly performed.

As another example of the AF operation, the DSC 1
Focusing is performed by the distance ring of the interchangeable lens 3 without performing the F operation. That is, the DSC 1 keeps the focus adjustment state fixed at a fixed distance, for example, at the position of the image 13 in FIG. Also in this case, the AF operation may be performed only when the release button is half-pressed.

As another example of the case where the AF operation is always performed, an AF signal is input from the DSC 1 to the interchangeable lens 3 so that the subject image 13 is formed at the position shown in FIG. Is driven. That is,
The AF operation is performed on the interchangeable lens 3 side, and the photographing lens 15 side is fixed at a predetermined focus adjustment state.

<< Explanation Regarding Zoom Operation >> In the above embodiment, the taking lens 15 is a zoom optical system.
In the interchangeable lens mode, a limit is set for the zoom region. That is, when the photographing lens 15 of the DSC 1 is driven to the wide side, the angle of view increases, and a range larger than the subject image 13 is formed on the imaging surface of the CCD imaging device 17.
As a result, the subject is projected on the central area of the LCD monitor 36, and the peripheral area becomes dark. Therefore, the zoom range is limited as described above so that such inconvenience does not occur.

In the correspondence between the embodiment described above and the elements of the claims, the taking lens 15 is a first taking optical system, the interchangeable lens 3 is a second taking optical system, and the lenses 10 and 11 are The optical system according to claim 1,
Reference numeral 3 denotes a selection unit, the image processing CPU 46 converts a unit, the main CPU 49 stores a recording unit, a prohibition unit, a restriction unit and a zoom range restriction unit, the focus detection unit 40 and the lens driving unit 41 operate a focus adjustment unit, and an interchangeable lens mode. Constitutes a first photographing mode, and the normal mode constitutes a second photographing mode.

[0040]

As described above, according to the first aspect of the present invention, it is possible to mount the second photographing optical system in addition to the first photographing optical system provided in the electronic camera. . Further, since the lens adapter is constituted by an optical system having a positive refractive power, subject light from the second photographing optical system is effectively incident on the first photographing optical system. According to the second to seventh aspects of the present invention, the subject image taken in the first shooting mode is
Since the conversion unit converts the image so that the orientation of the subject image coincides with the direction of the subject image captured in the second shooting mode, an appropriate erect subject image can be shot even when the second imaging optical system is additionally mounted for shooting. can do.

[Brief description of the drawings]

FIG. 1 is a sectional view illustrating a lens adapter according to the present invention.

FIG. 2 shows a DSC mounting portion 4 of the lens adapter 2 shown in FIG.
FIG.

FIG. 3 is a cross-sectional view showing the DSC 1 during normal use.

FIGS. 4A and 4B are views showing the appearance of the DSC 1, wherein FIG. 4A is a plan view and FIG. 4B is a view of the DSC 1 as viewed from the back.

FIG. 5 is a block diagram showing a schematic configuration of DCS1.

FIG. 6 is a flowchart showing an outline of a photographing operation.

[Explanation of symbols]

 Reference Signs List 1 electronic camera (DSC) 2 lens adapter 3 interchangeable lens 15 shooting lens 17 CCD image pickup device 33 select dial 36 LCD monitor 46 image processing CPU

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/225 H04N 101: 00 5/232 G02B 7/11 N // H04N 101: 00 G03B 3/00 A F-term (reference) 2H011 AA03 CA01 CA14 CA21 DA05 2H051 AA00 AA02 EA30 EB13 FA61 GB15 2H054 AA01 2H101 EE03 EE04 EE05 EE08 EE31 5C022 AA13 AB21 AB21 AB22 AB43 AB68 AC01 AC13 AC31 AC42 AC54 AC78

Claims (7)

[Claims] 1. An electronic camera comprising: a first photographing optical system; and an image pickup device for photographing a subject image incident through the first photographing optical system and outputting an image signal. A lens adapter for mounting an optical system, which has a built-in optical system having a positive refractive power and for causing a subject image emitted from the second photographing optical system to enter the first photographing optical system. A lens adapter, characterized in that: 2. An image pickup device for picking up a subject image and outputting an image signal, and a first photographing optical system for forming the subject image on an image pickup surface of the image pickup device, wherein the first photographing is performed. An electronic camera to which a second photographing optical system different from the optical system can be additionally attached, wherein a first photographing mode for photographing by attaching the second photographing optical system, and without attaching the second photographing optical system The second to shoot
Selecting means for selecting a shooting mode; converting means for converting an image signal so that the direction of the subject image captured in the first shooting mode matches the direction of the subject image captured in the second shooting mode; An electronic camera, comprising: a recording unit that records a signal converted by the conversion unit on a recording medium when the first photography mode is selected by the selection unit. 3. The electronic camera according to claim 2, wherein the first photographing optical system is driven to focus a subject image on an imaging surface of the image sensor, and the first photographing mode. An electronic camera further comprising prohibiting means for prohibiting a focusing operation by the focus adjustment device when is selected. 4. The electronic camera according to claim 2, wherein the first photographing optical system is driven to focus a subject image on an image pickup surface of the image pickup device, and the first photographing mode is provided. When is selected, the electronic camera further comprises limiting means for limiting an image plane moving range in a focusing operation by the focus adjustment device. 5. The electronic camera according to claim 2, wherein said first photographing optical system is a zoom optical system, and said first photographing optical system is a zoom optical system.
An electronic camera, further comprising a zoom range limiting unit that limits a zoom range of the zoom optical system when a shooting mode is selected. 6. The electronic camera according to claim 2, wherein the second photographing optical system is mounted via the lens adapter according to claim 1. . 7. The electronic camera according to claim 2, wherein the conversion unit inverts up, down, left, and right of the image signal output from the imaging device.