JP2010035131A - Imaging apparatus and imaging method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect which of a teleconversion lens and a wide-conversion lens is mounted on an imaging apparatus by using optical characteristics of the teleconversion lens and wide-conversion lens. <P>SOLUTION: When a lens detecting means (109) detects a mounted conversion lens and an vignetting detecting means (210) detects vignetting at a wide end of a zoom lens, a lens determining means (210) determines that the mounted conversion lens is a teleconversion lens. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an imaging device and an imaging method for detecting the type of a conversion lens attached to the imaging device.

As an attachment for changing the focal length of a lens in an imaging apparatus such as a digital camera, a wide conversion lens (hereinafter referred to as “WICON”) and a tele conversion lens (hereinafter referred to as “TELECON”) are known. When these conversion lenses are attached to the imaging apparatus, focus control, image processing, or the like may need to be changed. For this reason, an imaging device is often provided with a mechanism for detecting whether or not a conversion lens is attached.
There are a mechanical method and an electrical method for detecting the wearing of the conversion lens.
As a mechanical method, there is a method in which when a conversion lens is attached to the imaging apparatus, a detection claw provided in the imaging apparatus is pressed.
As an electrical method, there is a method of automatically detecting the wearing of a telecon by detecting the occurrence of vignetting based on the luminance of pixels at the four corners of the imaging screen (for example, Patent Document 1).

However, in the detection method described above, it is impossible to accurately determine whether the telecon is mounted or whether the wide-screen camera is mounted. Therefore, various operations related to the shooting control of the camera corresponding to the type of the mounted conversion lens are performed. It cannot be changed. Here, the various operations related to the shooting control of the camera are, for example, the focus scanning range, the amount of correction when there is camera shake correction, the amount of correction when there is distortion aberration correction, etc. Means.
If the imaging device is equipped with two different detection claws, and the Wicon and Telecon depress the different detection claws, it is possible to mechanically ensure that the attached conversion lens is a Widecon or Telecon. Can be distinguished. However, it may be difficult to prepare two types of detection claws in advance on the camera side due to size and cost factors on the camera side.
Further, in the method described in Patent Document 1, it is possible to detect the occurrence of vignetting due to the installation of a telecon, but it has not yet been determined whether the attached conversion lens is a telecon or a widecon.
The present invention has been made in view of the above-described circumstances, and an object thereof is to detect which one of a telecon and a wide-conversion conversion lens is attached to an imaging apparatus.

In order to solve the above-described problems, the invention according to claim 1 is an imaging optical system including a zoom lens, and photoelectric conversion that converts light incident from the imaging optical system into an electrical signal and outputs the electrical signal. An image pickup apparatus comprising: an element; a lens detection unit that detects attachment of a conversion lens; an vignetting detection unit that detects vignetting around an image output from the photoelectric conversion element; and A lens determining unit that determines a type, and the lens determining unit detects whether the vignetting detection unit detects vignetting at the wide end of the zoom lens when the lens detecting unit detects the mounting of a conversion lens. The type of the conversion lens is determined based on whether or not.
According to a second aspect of the present invention, in the imaging apparatus according to the first aspect, the lens detection unit detects the attachment of the conversion lens, and the vignetting detection unit causes vignetting at the wide end of the zoom lens. When detected, the lens determining means determines that the attached conversion lens is a teleconversion lens.
According to a third aspect of the present invention, in the imaging device according to the first aspect, the lens detection unit detects the attachment of a conversion lens, and the vignetting detection unit detects the vignetting and the zoom at the wide end of the zoom lens. The lens determining means determines that the attached conversion lens is a tele-conversion lens when the reduction of the vignetting when the lens is moved in the telephoto end direction is detected.
According to a fourth aspect of the present invention, in the imaging apparatus according to any one of the first to third aspects, the zoom lens includes a lens driving unit that drives the zoom lens, and the conversion lens is mounted by the lens detection unit. When detected, the lens driving means drives the zoom lens to change the zoom position of the imaging optical system to the wide end.

According to a fifth aspect of the present invention, in the imaging apparatus according to any one of the first to fourth aspects, the zoom lens is selected when the conversion lens mounted by the lens determination unit is determined to be a teleconversion lens. The lens driving means limits the zoom position to a range where vignetting does not occur.
According to a sixth aspect of the present invention, in the imaging apparatus according to any one of the first to fifth aspects, the image pickup apparatus further includes an image data recording unit that records image data on a recording medium. Image data and information regarding the type of conversion lens used to capture the image data are recorded in association with each other on the recording medium.
Further, the invention described in claim 7 is the imaging device according to any one of claims 1 to 6, further comprising image data recording means for recording image data on a recording medium, wherein the image data recording means comprises: The image data and lens focal length information corrected according to the type of conversion lens used for imaging the image data are recorded in association with each other on the recording medium.

According to an eighth aspect of the present invention, there is provided an imaging apparatus comprising: an imaging optical system including a zoom lens; and a photoelectric conversion element that converts light incident from the imaging optical system into an electrical signal and outputs the electrical signal. An image pickup method in the apparatus, wherein a lens detection unit detects a wearing of a conversion lens, a vignetting detection unit detects a vignetting around an image output from the photoelectric conversion element, and a lens determination And a lens determination step for determining the type of the conversion lens to which the means is mounted. When the conversion lens is detected in the lens detection step, vignetting is detected at the wide end of the zoom lens in the vignetting detection step. Depending on whether or not the lens is determined, the lens determining means performs the lens determining step. Te, and judging the type of the loaded conversion lens.
According to a ninth aspect of the present invention, in the imaging method of the eighth aspect, the attachment of a conversion lens is detected in the lens detection step, and vignetting at the wide end of the zoom lens is detected in the vignetting detection step. When detected, the lens determination means determines that the attached conversion lens is a teleconversion lens in the lens determination step.
According to a tenth aspect of the present invention, in the imaging device according to the eighth aspect, the attachment of a conversion lens is detected in the lens detection step, and the vignetting and the zoom at the wide end of the zoom lens are detected in the vignetting detection step. The lens determining means determines that the attached conversion lens is a tele-conversion lens when the reduction of the vignetting when the lens is moved in the telephoto end direction is detected.

The invention according to claim 11 is the imaging method according to claim 8 or 10, further comprising lens driving means for driving the zoom lens, and when the mounting of the conversion lens is detected in the lens detection step. The lens driving unit drives the zoom lens to change the zoom position of the imaging optical system to the wide end.
The invention according to claim 12 is the imaging method according to any one of claims 8 to 11, wherein when the conversion lens mounted in the lens determination step is determined to be a teleconversion lens, the zoom is performed. The lens driving means limits the zoom position to a range where vignetting does not occur.
According to a thirteenth aspect of the present invention, in the imaging method according to any one of the eighth to twelfth aspects, the image data recording means includes the image data and a conversion lens used for imaging the image data. The method includes a step of associating and recording information on types on a recording medium.
According to a fourteenth aspect of the present invention, in the imaging method according to any one of the eighth to thirteenth aspects, the image data recording means is the conversion lens used for imaging the image data and the image data. And a step of recording the information on the lens focal length corrected in accordance with the type of information on the recording medium in association with each other.

  According to the imaging apparatus and the imaging method of the present invention, since the type of the conversion lens attached to the imaging apparatus can be detected, the apparatus can be reduced in size and the configuration can be simplified.

It is a figure which shows the structure of a standard digital camera. It is a figure which shows a mode that the conversion lens was mounted | worn with the digital camera, (a) shows a mode that the conversion lens is not mounted | worn, (b) shows a mode that the tele conversion lens is mounted | worn, (c) It is a figure which shows a mode that the wide conversion lens is mounted | worn. (A) thru | or (d) is a figure explaining the generation | occurrence | production state of eclipse when a front conversion lens is attached to a digital camera. It is a figure explaining the detection method of vignetting, (a) shows the state in which vignetting has not occurred in image data, and (b) shows the state in which vignetting has occurred in image data. It is an operation | movement flowchart of a digital camera. It is an operation | movement flowchart of the digital camera which concerns on 2nd embodiment.

A first embodiment of the present invention will be described.
First, a digital camera to which the present invention is applied will be described. FIG. 1 is a diagram showing a configuration of a standard digital camera (imaging device) 1.
The digital camera 1 processes an image imaging unit 100 that converts a subject image incident from the imaging lens system mechanism unit 103 into digital image data, image data sent from the image imaging unit, and operation of the digital camera 1. A processing system unit 200 for controlling
The image pickup unit 100 forms an image on a light receiving surface of a CCD (individual image pickup device) by an image pickup lens system mechanism unit 103 including an image pickup lens 101 and a mechanical shutter 102, and a subject image incident through the image pickup lens system mechanism unit 103. A photoelectric conversion unit 104 (photoelectric conversion element) that outputs an analog image signal, and an A / D conversion unit 105 that converts the analog image signal output from the photoelectric conversion unit 104 into digital image data and outputs the digital image data. The imaging lens 101 has a zoom lens (not shown) and a focus lens (not shown), and these lenses are driven by a motor driver 106 (lens driving means). The photoelectric conversion unit 104 and the A / D conversion unit 105 are driven by a timing signal from the timing signal generator 107.

The image capturing unit 100 further detects that the flash 108, which is a light emitting device, and a conversion lens are mounted, and outputs a detection signal to the microcomputer 210 (corresponding to the lens detection means in the claims). (Hereinafter referred to as a lens detection mechanism 109). The lens detection mechanism 109 is means for detecting whether or not a conversion lens is attached by a mechanical method.
For example, a single detection claw (not shown) may be provided at an appropriate location of the digital camera 1, and the detection claw may be pressed when any of the conversion lenses is attached. The method is particularly limited. It is not something. A method for determining the type of the conversion lens will be described later.
The motor driver 106, the timing signal generator 107, and the flash 108 described above are driven and controlled by drive signals from the microcomputer 210 described later. A detection signal from the lens detection mechanism 109 is input to the microcomputer 210.

The processing system unit is a digital signal processing unit 201 that generates image data output from the A / D conversion unit 105 into RGB or YUV format image data as necessary, and compresses or compresses the image data into a format such as JPEG. An image compression / decompression unit 202 that decompresses the image data, a pixel number conversion unit 203 that changes (resizes) the image data according to a display size or a recording size, and a display device 4 that displays a photographed image, information about photographing, and the like. And a video output control unit 204 that controls display output of the display device 4, an external device such as a memory card that stores image data for recording generated by the digital signal processing unit 201, the image compression / decompression unit 202, and the pixel number conversion unit 203. A data storage memory 5 (image data recording medium) as a memory and a storage medium for controlling the operation of the data storage memory 5 A control circuit 205 (image data recording means), an acceleration sensor 6 that detects the tilt of the digital camera 1, a detector control circuit 206 that controls the operation of the acceleration sensor 6, and a communication interface 7 that is connected to an external device and transmits and receives image data. And the communication control circuit 207 for controlling the operation of the communication interface 7 and the RAW-RGB data fetched from the image capturing unit 100 and the image compressed by the image compression / decompression unit 202 in a format such as JPEG as necessary. A main memory 8 (image data recording medium) in which data and image data resized by the pixel number conversion unit 203 are stored, and a memory control circuit 208 (image data recording means) for controlling the operation of the main memory 8 are provided. Yes.
These are connected via a system bus 209, and the operation is performed by a control program stored in an EEPROM (Electrically Erasable and Programmable Read Only Memory) 9 which is a nonvolatile memory, and input from the camera operation unit 10 by a user. Based on the control signal from the microcomputer 210 (in this embodiment, included in the vignetting detection unit, the lens determination unit, and the control unit). Note that the right of use of the system bus 209 is controlled by a direct memory access controller (DMAC) 211.

Next, the characteristics of the conversion lens and the principle of the present invention will be described.
2A and 2B are diagrams showing a state where the conversion lens is attached to the digital camera 1, wherein FIG. 2A shows a state where the conversion lens is not attached, and FIG. 2B shows a state where the telecon 20 is attached. (C) is a figure which shows a mode that the wicon 21 is mounted | worn.
As shown in FIG. 2 (a), when the conversion lens is not attached and the subject H shown in FIG. When attached, the subject H is enlarged and imaged on the image plane K.
Here, the telecon 20 is a lens used for extending the focal length of the entire lens group by adding to the original lens group. In general, the original lens group is inserted between the original lens group and the imaging plane K so as to be separated from the imaging plane K, and the leading end of the original lens group is compared with the original lens group. There is also a method of attaching to the subject H side (that is, the side opposite to the imaging plane K with respect to the original lens group).
The former lens is called a rear conversion lens, and the latter lens is called a front conversion lens. In FIG. 2, the imaging lens 101 is the original lens group, and FIG. 2B shows an example in which the telecon 20 that is a front conversion lens is attached to the digital camera 1.

When the telecon is a rear conversion lens, image vignetting is unlikely to occur due to the lens structure, but when the telecon is a front conversion lens, image vignetting does not occur, that is, the light flux of the original lens group is not blocked. However, there is a demerit that the conversion lens itself becomes large. However, since the telecon is a lens that is used for the purpose of extending the focal length at the tele end of the original lens group, if there is no vignetting at the tele end (telephoto end) with a narrow field angle, From a viewpoint, this is not a big problem. Therefore, by allowing vignetting on the wide side (wide angle side) with a wide angle of view, the conversion lens itself can be reduced in size. Such a telecon is commonly used as an optional device for a lens-fixed imaging device.
On the other hand, the wide-angle lens is a lens used for further widening the angle of view on the wide side. For this reason, even if the conversion lens itself is increased in size, it is usually designed so that image vignetting does not occur on the wide side.
In this way, the telecon is generally designed to reduce the size of the device while allowing vignetting on the wide side, whereas the wideband is designed to have a size that does not cause vignetting on the wide side. is there.

FIGS. 3A and 3B are diagrams for explaining the occurrence of vignetting when the front conversion lens is attached to the digital camera 1. FIG. 3A is a diagram illustrating the tele side when the wi-con is mounted, and FIG. (C) is a diagram showing the wide side when the wide-angle camera is mounted, and (d) is a diagram showing the wide side when the tele-con is mounted. As shown in FIG. 3, it can be seen that vignetting occurs only when the zoom is set to the wide side when the telecon is mounted (FIG. 3D).
Therefore, after the lens detection mechanism 109 detects that the conversion lens is attached to the digital camera 1, if the vignetting does not occur even if the zoom lens of the imaging lens 101 is wide, the attached conversion lens is wide. It can be judged that there is. Conversely, if vignetting occurs when the zoom lens is set to the wide side, it can be determined that the attached conversion lens is a telecon.

Here, a method for detecting vignetting will be briefly described. As described above, vignetting can be detected using conventional techniques, and the method described in Patent Document 1 can also be applied to the present invention.
4A and 4B are diagrams for explaining a vignetting detection method. FIG. 4A shows a state in which no vignetting has occurred in image data, and FIG. 4B shows a state in which vignetting has occurred in image data. is there.
As shown in FIG. 4, when vignetting occurs, the four corners of the image data become black. Therefore, the microcomputer 210 as the vignetting detection means divides the image data vertically and horizontally and divides the image data into areas of appropriate sizes, measures the exposure amount in each area, and calculates an evaluation value. If vignetting does not occur as shown in FIG. 4A, an evaluation value appropriate for an image can be obtained up to every area of the image data.
However, in the state where vignetting has occurred as shown in FIG. 4B, the periphery of the image data is almost black, so the evaluation value of the area corresponding to the position where vignetting has occurred is black. Is a value indicating. By detecting this evaluation value pattern, it is possible to detect whether or not vignetting has occurred in the image data.

Next, the operation of the digital camera 1 will be described. FIG. 5 is an operation flowchart of the digital camera 1.
First, when the digital camera 1 is activated, the microcomputer 210 confirms whether or not the conversion lens is detected by the lens detection mechanism 109. If the attachment of the conversion lens is not detected (No in step S1), the flow goes through the flowchart to end the shooting preparation operation.
If the lens detection mechanism 109 detects that any conversion lens is mounted (Yes in step S1), the microcomputer 210 drives the motor driver 106 to set the zoom position of the imaging lens 101 to the wide end (step). S2). Then, it is determined whether or not vignetting has occurred in the image data obtained through the imaging lens 101 (step S3).
If vignetting has occurred in the image data (Yes in step S3), it is determined that the attached conversion lens is a telecon, and various operations related to the shooting control of the digital camera 1 are changed corresponding to the telecon ( Step S4), the photographing preparation operation is completed. On the other hand, if vignetting has not occurred in the image data (No in step S3), it is determined that the attached conversion lens is a Wicon, and various operations related to the shooting control of the digital camera 1 are changed corresponding to the Wicon. (Step S5), and the shooting preparation operation is completed.

When a telecon is detected, it is possible to perform control so as to restrict the zoom position to a range where no vignetting occurs during the photographing operation. Thereby, a beautiful image without vignetting can be taken.
Of course, the above operation can be performed not only when the digital camera 1 is activated but also during the operation. In this case, the processing after step S2 may be performed after detecting the attachment of the conversion lens.
Here, during the operation of the digital camera 1, there is a possibility that the zoom position has been changed from the initial state. In such a case, it may be desirable to return the zoom position to the state when the conversion lens is detected.
Therefore, during the operation of the digital camera 1, before setting the zoom position of the imaging lens 101 to the wide end (step S2), the microcomputer 210 confirms the zoom position and temporarily stores it in the main memory 8, and either step S4 or step After performing the operation of S5, the zoom lens is moved to the position at the time of detecting the conversion lens, and control is performed so as to complete the photographing preparation operation.
Note that the user may be able to set whether or not to perform this control.

In general, a digital camera records a photographed image in a recording medium (main memory 8 or data storage memory 5) in a logical format called a file. The image file has, in addition to the image data, an area called a header for recording various information related to photographing of the image at the head portion of the image file.
In the present invention, the type of the conversion lens used is described in the header area of the image file. Thereby, it is possible to know which conversion lens is mounted from the recorded image file.
The header area includes an area for recording the focal length of the lens at the time of shooting. As described above, since the conversion lens changes the focal length, in the present invention, the focal length information to be recorded is corrected and recorded according to the type of the detected conversion lens. In other words, the combined focal length when actual photographing is performed, which is obtained by reflecting the focal length corrected by the conversion lens in the focal length of the imaging lens 101, is recorded. Thereby, the correct focal length can be known from the recorded image file.
As described above, according to the present invention, it is only necessary to provide the imaging apparatus with a common detection mechanism for detecting that any conversion lens is mounted as a mechanical means for detecting whether or not the conversion lens is mounted. Since the type of the conversion lens is determined based on the vignetting state at the end, the lens determination can be handled by changing the control program. Therefore, according to the present invention, it is possible to reduce the size and cost of the imaging apparatus.

In addition, since the zoom position is once moved to the wide end regardless of the zoom position when the conversion lens is mounted, the type of conversion lens mounted can be specified regardless of the zoom position when the conversion lens is mounted. it can.
In addition, when the detected conversion lens is a telecon, it is possible to take a picture by limiting the zoom position to a range without vignetting, so that the telecon Even with a version lens, it is possible to shoot without vignetting.
Also, since it has a function to record the type of conversion lens in the file to be recorded according to the type of conversion lens detected, it can know which conversion lens is attached from the recorded image file it can.
In addition, since it has a function to reflect the result in the lens focal length value of the file to be recorded according to the type of conversion lens detected, it is possible to know the focal length actually taken from the recorded image file. it can.
In the present embodiment, a digital camera has been described as an example of a photographing apparatus. However, the present invention is not limited to this form, and any apparatus that captures images and videos may be used. For example, a video camera may be used.

A second embodiment of the present invention will be described.
In the first embodiment, it is determined that the attached conversion lens is a telecon when there is vignetting when the zoom lens is at the wide end. However, if the subject accidentally has a luminance distribution similar to the state where vignetting has occurred, it is distinguished whether the detected vignetting is due to the installation of the telecon or the luminance distribution of the subject. It may be difficult to do.
Therefore, in this embodiment, in addition to the vignetting state at the wide end of the zoom lens described in the first embodiment, the change in the vignetting state when the zoom lens is operated is not limited to the conversion attached to the digital camera. It was decided to use it to determine the type of lens.

FIG. 6 is an operation flowchart of the digital camera 1 according to the second embodiment. The same steps as those in FIG. 5 are denoted by the same reference numerals, and the description thereof is omitted.
When the digital camera 1 is activated, the lens detection mechanism 109 detects that the conversion lens is mounted (step S1), and when the zoom position of the imaging lens 101 is set to the wide end (step S2), vignetting occurs in the image data. In this case (Yes in Step S3), the conversion lens attached to the digital camera 1 may be the telecon 20.
Therefore, the microcomputer 210 drives the motor driver 106 to move the zoom position of the imaging lens 101 toward the tele end side, and examines how the vignetting state changes (step S11). The vignetting state change is examined by sampling image data at a predetermined interval based on the timing signal from the timing signal generator 107. Further, regarding how the vignetting state changes, statistics are collected in advance and stored in the main memory 8, the EEPROM 9, or the like.
If it is determined that the vignetting is gradually reduced according to the statistical value stored in the main memory 8 or the like and the vignetting is lost in the vicinity of the telephoto end (Yes in step S12), it is determined that the attached conversion lens is a telecon. Then, various operations relating to shooting control of the digital camera 1 are changed corresponding to the telecon (step S4), and the shooting preparation operation is completed.

On the other hand, if it is determined that the vignetting state is not reduced according to the statistical value stored in the main memory 8 or the like (No in step S12), it is determined that the attached conversion lens is a wide camera, and the digital camera Various operations related to the shooting control 1 are changed in correspondence with the wide control (step S5), and the shooting preparation operation is completed.
The above-described operation may be performed during the operation of the photographing apparatus, and the zoom position may be returned to the position at the time of detection of the converter before the preparation for photographing is completed, as in the first embodiment. is there. In addition, as in the first embodiment, it is also possible to record information on the type of conversion lens and the combined focal length reflecting the correction by the conversion lens in the header area of the image file.
As described above, in this embodiment, in addition to the vignetting state at the wide end of the zoom lens described in the first embodiment, the change in the vignetting state when the zoom lens is operated is also converted into the conversion mounted on the digital camera. Since it is used to determine the type of lens, it is possible to distinguish whether the vignetting that occurs in the image data is due to the installation of the telecon or from the subject. It can be avoided.

  DESCRIPTION OF SYMBOLS 1 ... Digital camera, 100 ... Image pick-up part, 101 ... Imaging lens, 102 ... Mechanical shutter, 103 ... Imaging lens mechanism part, 103 ... Imaging lens system mechanism part, 104 ... Photoelectric conversion part, 105 ... A / D conversion part, 106 DESCRIPTION OF SYMBOLS Motor driver 107 Timing signal generator 108 Flash 109 Conversion lens detection mechanism 200 Processing system unit 201 Digital signal processing unit 202 Image compression / decompression unit 203 Pixel number conversion unit 204 DESCRIPTION OF SYMBOLS ... Video output control part, 205 ... Storage medium control circuit, 206 ... Detector control circuit, 207 ... Communication control circuit, 208 ... Memory control circuit, 209 ... System bus, 210 ... Microcomputer, 4 ... Display device, 5 ... Data storage Memory 6 ... Acceleration sensor 7 ... Communication interface 8 ... Main memory 9 ... EEPROM 0 ... camera operation section, H ... subject, K ... imaging surface, 20 ... tele conversion lens, 21 ... wide conversion lens

JP 2000-231149 A

Claims (14)

An imaging apparatus comprising: an imaging optical system including a zoom lens; and a photoelectric conversion element that converts light incident from the imaging optical system into an electrical signal and outputs the electrical signal,
A lens detection unit that detects the mounting of the conversion lens, a vignetting detection unit that detects vignetting around the image output from the photoelectric conversion element, and a lens determination unit that determines the type of the mounted conversion lens,
The lens determination means determines the type of the conversion lens according to whether or not the vignetting detection means has detected vignetting at the wide end of the zoom lens when the lens detection means detects the attachment of the conversion lens. An imaging apparatus characterized by the above.   2. The imaging device according to claim 1, wherein when the lens detection unit detects that a conversion lens is mounted and the vignetting detection unit detects vignetting at the wide end of the zoom lens, An imaging device, wherein the attached conversion lens is determined to be a teleconversion lens.   2. The imaging device according to claim 1, wherein the lens detection unit detects attachment of a conversion lens, and the vignetting detection unit moves the vignetting at the wide end of the zoom lens and the zoom lens toward the tele end. An image pickup apparatus, wherein when the reduction of vignetting is detected, the lens determination unit determines that the attached conversion lens is a tele conversion lens.   4. The imaging device according to claim 1, further comprising a lens driving unit that drives the zoom lens, wherein when the lens detection unit detects that a conversion lens is mounted, the lens driving unit An imaging apparatus, wherein a zoom lens is driven to change a zoom position of the imaging optical system to a wide end.   5. The imaging device according to claim 1, wherein when the conversion lens mounted by the lens determination unit is determined to be a tele-conversion lens, the zoom lens driving unit generates vignetting in the zoom position. An image pickup apparatus that is limited to a range not to be used. In the imaging device according to any one of claims 1 to 5,
Comprising image data recording means for recording image data on a recording medium;
The image data recording means records the image data and information on the type of conversion lens used for imaging the image data in association with each other and records them on the recording medium. In the imaging device according to any one of claims 1 to 6,
Comprising image data recording means for recording image data on a recording medium;
The image data recording means records the image data and the lens focal length information corrected according to the type of the conversion lens used for capturing the image data in association with each other and records them on the recording medium. An imaging device. An imaging method in an imaging apparatus comprising: an imaging optical system including a zoom lens; and a photoelectric conversion element that converts light incident from the imaging optical system into an electrical signal and outputs the electrical signal,
A lens detection step in which the lens detection means detects the attachment of the conversion lens; an vignetting detection step in which the vignetting detection means detects vignetting around the image output from the photoelectric conversion element; and a conversion lens to which the lens determination means is attached. A lens determination step for determining the type, and
When the conversion lens is detected in the lens detection step, whether or not vignetting is detected at the wide end of the zoom lens in the vignetting detection step, the lens determination unit is mounted in the lens determination step. An imaging method comprising determining a type of a conversion lens.   9. The imaging method according to claim 8, wherein when the conversion lens is detected in the lens detection step and vignetting at the wide end of the zoom lens is detected in the vignetting detection step, the lens determination means is In the lens determining step, it is determined that the attached conversion lens is a teleconversion lens.   9. The imaging apparatus according to claim 8, wherein the conversion lens is detected in the lens detection step, and the vignetting at the wide end of the zoom lens and the zoom lens are moved in the tele end direction in the vignetting detection step. An image pickup apparatus, wherein when the reduction of vignetting is detected, the lens determination unit determines that the attached conversion lens is a tele conversion lens.   11. The imaging method according to claim 8, further comprising a lens driving unit that drives the zoom lens, wherein when the lens detection step detects that a conversion lens is mounted, the lens driving unit An imaging method, wherein a zoom lens is driven to change a zoom position of the imaging optical system to a wide end.   12. The imaging method according to claim 8, wherein when the conversion lens mounted in the lens determination step is determined to be a teleconversion lens, the zoom lens driving unit generates vignetting in the zoom position. An imaging method characterized by limiting to a range not to be performed. The imaging method according to any one of claims 8 to 12,
An imaging method comprising: a step of recording image data on a recording medium in association with image data and information on the type of conversion lens used for imaging the image data. The imaging method according to any one of claims 8 to 13,
The image data recording means includes a step of recording the image data on the recording medium in association with the lens focal length information corrected according to the type of the conversion lens used for capturing the image data. A characteristic imaging method.

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