JP4018217B2 - Focus adjustment device and signal processing device for focus adjustment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a focus adjustment device such as a camera and a signal processing device for focus adjustment.
[0002]
[Prior art]
In recent years, a focus adjustment device used for a camera or the like is provided with distance measuring points at a plurality of locations on a screen so that the main subject can always be focused regardless of the position of the main subject on the shooting screen. A multipoint ranging method has become mainstream.
[0003]
This multi-point distance measurement method mainly measures the distance of the distance measurement point in the center of the screen and the distance of a plurality of distance measurement points around it (for example, two points on the left and right), and based on each distance data, It predicts and determines whether the main subject is located at the distance measuring point, thereby enabling focusing on the main subject.
[0004]
As one of the prediction criteria, since the main subject is generally closer than the background, a method for selecting a distance measuring point at which the closest distance data is obtained is proposed by Japanese Patent Publication No. 5-43964. Yes.
[0005]
By the way, this multi-point distance measurement method requires a long distance measurement time compared to a conventional method of measuring only a plurality of distance measurement points using only the center of the screen as a distance measurement point. The time lag (the delay until the film exposure operation starts after the release switch is pressed) is increased, and as a countermeasure, the main subject is usually located at the center of the screen. If you measure the center of the screen and the distance measurement data is within the specified short distance range with low possibility of background, the distance measurement of the center of the screen is preferentially performed without measuring the distance of other distance measuring points. A so-called center-weighted method for reducing time by selecting data and performing focus adjustment has also been proposed.
[0006]
[Problems to be solved by the invention]
However, the above center-weighted distance measuring method is, for example, when a camera is trying to shoot with a middle distance background etc. near the center of the screen with two people lined up side by side. There is a high possibility that the camera will be in focus, and a so-called hollow problem will occur.
[0007]
In other words, as a camera subject, there are many occasions where two people are photographed side by side, and if the background in the center of the screen is a long distance such as a landscape, it is a distance that is likely to be a background. It is highly likely that the person who is the main subject will be in focus, but if the background at the center of the screen is a medium distance such as a wall, the center distance measurement point is selected without being judged as the background. Because the background is in focus, the person who is the main subject is out of focus.
[0008]
An object of the present invention is to provide a focus adjustment device and a focus adjustment signal processing device capable of shortening the time required for focus adjustment without lowering the focusing rate with respect to the target object.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides: Corresponds to the distance to the object to be measured at the first point in the field of view and at a plurality of points closer to the field of view than the first point. Detection means for detecting information, focus adjustment means for performing focus adjustment based on a detection result of the detection means, When it is detected that the distance to the object to be measured at the second point among the plurality of points at the edge of the field of view is longer than the distance to the object to be measured at the first point, Control is performed so that focus adjustment is performed based on the detection result at the first point without performing detection at a point other than the second point among the plurality of end points. And a focusing device having a control means.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
In the embodiment of the present invention, IRD (infrared light-emitting element) is projected onto a measurement point, and the reflected light is received by a PSD (semiconductor position detection element) to measure the distance, so-called active distance measurement is used. The present invention is not limited to this type of active distance measurement, but may be any object as long as it can measure information about the distance to the object such as passive distance measurement. Keep it.
[0013]
(First embodiment)
FIG. 1 is a block diagram showing a configuration of a camera according to an embodiment of the present invention. In FIG. 1, reference numeral 114 denotes a microcomputer (hereinafter abbreviated as a microcomputer) that performs signal processing and control of each component in FIG. 1, and reference numerals 119 to 121 denote distance measurement points on the right side, center, and left side of the shooting screen as a field of view. Right IRED, central IRED, left IRED, 122 to 124 are light projecting means for projecting signal light toward the IRED 119 to 121, and drivers for causing each of the IREDs 119 to 121 to emit light, and 115 to 117 are IREDs 119 to 121. Left light reception composed of PSD as light receiving means for receiving reflected light from a subject as an object located at each distance measuring point of the projected signal light and outputting a signal corresponding to the light receiving position. The sensor, the center light receiving sensor, and the right light receiving sensor 118 are light receiving signals output from the light receiving sensors 115 to 117, respectively. A known processing circuit 125 for processing is a SW1 switch 126 that is turned on by a first stroke of a release button, which is a release member for starting capturing of camera photographing information (photometry, distance measurement, etc.), 126 The SW2 switch 127, which is turned on by the second stroke of the release button for performing an image recording operation (shutter opening / closing, etc.) based on the photographing information captured when the SW1 switch 125 is turned on, is controlled by the microcomputer 114. A lens driving circuit including a lens driving motor for driving a photographing lens (not shown) by a signal and performing focus adjustment, and 128 is a shutter driving circuit for controlling a shutter driving actuator (not shown) and the like according to a control signal from the microcomputer 114 129 performs film feeding in accordance with a control signal from the microcomputer 114. A winding driving circuit including Irumu transport motor.
[0014]
FIG. 4 is an example of a circuit diagram showing a specific configuration of the processing circuit 118 shown in FIG.
[0015]
As shown in FIG. 4, in the processing circuit 118 of the present embodiment, the minute current outputs a (for example, the long distance side output) and b (for example, the short distance side output) of the light receiving sensors 115 to 117 are converted into voltages. Current-voltage converters A1 and A2, inverting amplifiers A3 and A4 for amplifying the outputs of current-voltage converters A1 and A2, a summing amplifier A5 for adding outputs of amplifiers A3 and A4, and a summing amplifier A5 Analog switches 32 and 33 for switching the input to are included.
[0016]
The current-voltage converters A1 and A2 are composed of operational amplifiers 16 and 17 (hereinafter abbreviated as operational amplifiers) and feedback resistors 18 and 19, respectively. The output terminals of the operational amplifiers 16 and 17 are for DC blocking. Capacitors 20 and 21 are connected.
[0017]
The inverting amplifiers A3 and A4 are composed of operational amplifiers 24 and 25, feedback resistors 26 and 27, and magnification resistors 22 and 23. DC operational capacitors 28 and 29 are connected to output terminals of the operational amplifiers 24 and 25, respectively. It is connected.
[0018]
The summing amplifier A5 includes an operational amplifier 34, a feedback resistor 35, and magnification resistors 30 and 31, and analog switches 32 and 33 are provided between the resistors 30 and 31 and the inverting input terminal of the operational amplifier 34. It is automatically selected whether only the output of the inverting amplifier A3 is introduced into the operational amplifier 34 or both outputs of the amplifiers A3 and A4 are introduced into the operational amplifier according to the on / off state of the analog switch.
[0019]
That is, when the analog switch 33 is off, only the output of the amplifier A3 is introduced into the amplifier A5 to generate a as an output 39 of the amplifier A5. When the analog switch 33 is on, the amplifier A5 has the amplifiers A3 and A4. Since both outputs are introduced, the output 39 of the amplifier A5 becomes (a + b).
[0020]
The operational amplifier 40 constitutes an inverting amplifier having an amplification factor “−1” together with the resistors 41 and 42.
[0021]
The operational amplifier 47 constitutes an integrator together with the integrating capacitor 48. Further, a reset analog switch 49 is connected in parallel to the integrating capacitor 48.
[0022]
Further, the comparator 50 connected to the output of the operational amplifier 47 at the positive input terminal and the reference voltage Vc to the negative input terminal outputs a ranging operation end signal (also serving as a ranging information signal) to the microcomputer 114.
[0023]
The analog switches 45 and 46 connected to the operational amplifier 47 via the resistors 43 and 44 are for turning on / off in synchronization with the blinking cycle of the IREDs 119 to 121 and for synchronously detecting the signal light.
[0024]
FIG. 5 shows an output waveform during the distance measuring operation of the processing circuit 118 of FIG.
[0025]
The microcomputer 114 controls any one of the drivers 122 to 124 and starts driving any one of the IPEDs 119 to 121 (IRED blinking operation). At the same time, the analog switch 32 is turned on and the analog switch 33 is turned off. By controlling, the amplifier A5 outputs a [for example, long-distance side output].
[0026]
Due to the frequency detection action of the analog switches 45 and 46 with respect to this output and the inverted output of the operational amplifier 40, the integrating capacitor 48 is lowered for a T1 period (a predetermined time controlled by the microcomputer 114) controlled by the microcomputer 114 as shown in FIG. Will be integrated.
[0027]
When the T1 period ends, the analog switches 32 and 33 are controlled to be turned on, and the amplifier A5 outputs (a + b) [for example, long-distance side output + short-distance side output].
[0028]
Due to the frequency detection action of the analog switches 45 and 46 on this output and the inverted output of the operational amplifier 40, the integrating capacitor 48 is integrated up as shown in FIG.
[0029]
When the integrated output reaches the initial value (reference) Vc level, the comparator 50 outputs a signal inverted from the “Low” level to the “Hi” level to the microcomputer 114.
[0030]
The microcomputer 114 calculates distance measurement information based on the descending integration time T1 and the ascending integration time t.
[0031]
FIG. 2 is a control flowchart of the microcomputer 114. When the SW1 switch 125 is turned on, the following operation is started.
[0032]
In step 1, after the SW1 switch 125 is turned on, the photometry operation is performed by a photometry circuit (not shown), and in step 2, the distance measurement operation is performed. Details of the distance measuring operation will be described later with reference to FIG. In step 3, it is detected whether or not the SW2 switch 126 is turned on. If it is turned on, the process proceeds to step 5, and if not, the process proceeds to step 4. In step 4, it is detected whether or not the SW1 switch 125 is turned on. If it is turned on, the process proceeds to step 3 again. If not, the process proceeds to a standby state. In step 5, the lens driving circuit 127 performs lens driving corresponding to the distance measurement result in step 2, and in step 6, the shutter driving actuator 128 opens and closes (exposure) the shutter driving circuit 128 based on the photometry result in step 1. In step 7, in order to prepare for the next lens driving, the lens driving circuit 127 performs the lens initial positioning driving. In step 8, the winding circuit 129 performs the winding operation, which is frame advance of the film after taking a picture, and enters a standby state.
[0033]
FIG. 3 is a flowchart showing details of the distance measuring operation in step 2 of FIG.
[0034]
In step 11, the central IRED 120 is turned on by the driver 123, and the central light receiving sensor 116 receives the reflected light reflected from the object to be measured at the center of the screen by the central light receiving sensor 116. The distance Dc to the object to be measured at the center of the screen, which is the first distance measuring point, is obtained. (The time required for this step is several tens of ms.)
[0035]
In step 12, it is determined whether or not the distance measurement result at the center of the screen measured in step 11 is within a predetermined distance range where the possibility of the main subject is high (for example, 2m <Dc <4m). If there is, the process proceeds to Step 13, and if it is outside the predetermined distance range, the process proceeds to Step 19.
[0036]
In step 13, the right IRED 119 is turned on by the driver 122, and the right light sensor 117 receives the reflected light reflected from the distance measuring object on the right side of the screen, and the output of the right light sensor 117 is processed by the processing circuit 118. The distance Dr to the object to be measured of the distance measuring point on the right side of the screen, which is the second distance measuring point, is obtained. (The time required for this step is several tens of ms.)
[0037]
Step 14 compares the distance measurement result Dc of the screen center distance measurement point with the distance measurement result Dr of the distance measurement point on the right side of the screen. If Dr is closer, the process proceeds to step 16; Migrate to
[0038]
Step 15 selects the distance measurement result Dc at the center distance measurement point as the final distance measurement data, and the distance measurement sequence is completed. This is because, in step 12, the distance measurement result at the center of the screen is determined to be within a predetermined distance range where the possibility of the main subject is high, and the distance measurement result on the right side of the screen is farther than that. Since it can be predicted that this is not the case, the distance measurement result Dc at the center distance measurement point on the screen is selected as the distance measurement result of the main subject.
[0039]
In step 16, the left IRED 121 is turned on by the driver 124, the reflected light reflected by the distance measuring object on the left side of the screen is received by the left light receiving sensor 115, and the output of the left light receiving sensor 115 is processed by the processing circuit 118. The distance Dl to the object to be measured of the distance measuring point on the left side of the screen, which is the third distance measuring point, is obtained. (The time required for this step is several tens of ms.)
[0040]
In step 17, the distance measurement result Dr at the right-side distance measuring point is compared with the distance measurement result D1 at the distance-left distance measuring point. If Dr = Dl, the process proceeds to step 18, and if Dr = Dl, the process proceeds to step 15.
[0041]
Step 18 selects the distance measurement result Dr at the right-side distance measurement point or the distance measurement result D1 at the distance-left distance measurement point as the final distance measurement data (the distance measurement result is the same regardless of which one is selected). ), And the distance measuring sequence ends. This is considered to be the case where two persons are lined up and the middle distance background is in the vicinity of the center of the screen. Therefore, the distance measurement result Dr at the right-side distance measurement point or the left-side measurement of the screen capturing the persons lined up. The distance measurement result Dl of the distance point is selected as the distance measurement result of the main subject.
[0042]
Further, if Dr = Dl is not satisfied in Step 17, it is considered that the reason why the process moves to Step 15 is not a case where two people are lined up and a middle distance background is present near the center of the screen. Since it is determined that the distance measurement result is within the predetermined distance range where the main subject is highly likely, the process proceeds to step 15 and the distance measurement result Dc of the center distance measurement point on the screen is used as the distance measurement result of the main subject. select.
[0043]
In step 19, as in step 13, the right IRED 119 is turned on by the driver 122, and the right light receiving sensor 117 receives the reflected light reflected by the distance measuring object on the right side of the screen from the signal light of the IRED 119. Is obtained in the processing circuit 118, and the distance Dr to the object to be measured at the right distance measuring point on the screen is obtained. (The time required for this step is several tens of ms.)
[0044]
In step 20, similarly to step 16, the left IRED 121 is turned on by the driver 124, and the reflected light reflected from the distance measuring object on the left side of the screen is received by the left light receiving sensor 115. The output is taken into the processing circuit 118, and the distance Dl to the object to be measured at the distance measuring point on the left side of the screen is obtained. (The time required for this step is several tens of ms.)
[0045]
Step 21 is determined as the final distance measurement data that is closest to the distance measurement result Dc of the center distance measurement point on the screen, the distance measurement result Dr of the distance measurement point on the right side of the screen, and the distance measurement result D1 of the distance measurement point on the left side of the screen. Select one and end the ranging sequence. Since this does not correspond to the judgment criteria so far, the main subject is relatively close, so the distance measurement result determined to be the closest is selected as the distance measurement result of the main subject. To do.
[0046]
As described above, a distance measurement sequence that requires a considerable amount of time (several tens of milliseconds) compared to a general step (several hundreds μs) is displayed on the screen according to the conditions (in step 14, the distance measurement result of the distance measurement point on the right side of the screen If it is determined that it is farther than the distance measurement result of the center distance measurement point), the distance measurement operation time can be shortened without reducing the distance measurement performance.
[0047]
(Second Embodiment)
As described in the first embodiment, an integration circuit as shown in FIG. 4 is generally used as the distance measurement processing circuit, but the input from the light receiving means includes noise and the like. The descent integration time is set as a fixed value with a sufficiently long descending integration time so that a sufficient S / N ratio can be secured even for a long-distance ranging object in which the amount of received light is low.
[0048]
The present embodiment is for further shortening the distance measurement time based on the first embodiment.
[0049]
Since the configuration of this embodiment and the basic control flowchart (FIG. 2) are the same as those of the first embodiment, description thereof is omitted. In addition, a duplicate description similar to that of the first embodiment is also omitted.
[0050]
FIG. 6 is a flowchart showing details of the distance measuring operation in step 2 of FIG.
[0051]
Step 31 sets the descending integration time at the first distance measuring point to T1 (for example, 20 mS), and sets the calculation data group as a data group Data1 corresponding to the integration time T1.
[0052]
In step 32, the central IRED 120 is turned on by the driver 123, the reflected light reflected by the object to be measured at the center of the screen is received by the central light receiving sensor 116, and the output of the central light receiving sensor 116 is processed by the processing circuit 118. (At the descent integration time T1), the distance Dc to the object to be measured at the screen center distance measuring point, which is the first distance measuring point, is obtained (from the data group Data1). (For example, the time required for this step is about T1 + rise integration time = 30 mS.)
[0053]
In step 32, it is determined whether or not the distance measurement result of the screen center distance measurement point measured in step 32 is within a predetermined distance range (for example, Dc <4 m). If it is outside the predetermined distance range, the process proceeds to step 41.
[0054]
In step 34, the integration time after the second distance measuring point is set to T2 (for example, 10 mS), and the calculation data group is set as the data group Data2 corresponding to the integration time T2. The relationship between the descending integration times T1 and T2 is “T1> T2”.
[0055]
In step 35, the right IRED 119 is turned on by the driver 122, the reflected light reflected by the distance measuring object on the right side of the screen is received by the right light receiving sensor 117, and the output of the right light receiving sensor 117 is sent to the processing circuit 118. (At descending integration time T2), and the distance Dr to the object to be measured of the distance measurement point on the right side of the screen, which is the second distance measurement point, is obtained (from the data group Data2). (For example, the time required for this step is about T2 + rise integration time = 20 mS.)
[0056]
In step 36, the distance measurement result Dc at the center distance measurement point on the screen is compared with the distance measurement result Dr on the right distance distance measurement point. If Dr is closer, the process proceeds to step 38. If Dr is greater than Dc, step 37 is performed. Migrate to
[0057]
A step 37 selects the distance measurement result Dc of the screen center distance measurement point as the final distance measurement data, and the distance measurement sequence is completed.
[0058]
In step 38, the left IRED 121 is turned on by the driver 124, the reflected light reflected by the distance measuring object on the left side of the screen is received by the left light receiving sensor 115, and the output of the left light receiving sensor 115 is processed by the processing circuit 118. (At the descent integration time T2), and the distance Dl to the object to be measured of the left distance measuring point on the screen, which is the third distance measuring point, is obtained (from the data group Data2). (For example, the time required for this step is about T2 + rise integration time = 20 mS.)
[0059]
In step 39, the distance measurement result Dr at the right distance measuring point on the screen is compared with the distance measurement result D1 at the distance measurement point on the left side of the screen. If Dr = Dl, the process proceeds to step 40, and if Dr = Dl, the process proceeds to step 37.
[0060]
Step 40 selects the distance measurement result Dr at the right-side distance measuring point or the distance measurement result D1 at the right-side distance measuring point as the final distance measurement data, and ends the distance measurement sequence.
[0061]
In step 41, the right IRED 119 is turned on by the driver 122, the reflected light reflected by the distance measuring object on the right side of the screen is received by the right light receiving sensor 117, and the output of the right light receiving sensor 117 is processed by the processing circuit 118. (At descent integration time T1), and the distance Dr from the distance measuring point on the right side of the screen to the object to be measured is obtained (from the data group Data1). (For example, the time required for this step is about T1 + increase integration time = 30 mS.)
[0062]
In step 42, the left IRED 121 is turned on by the driver 124, the reflected light reflected by the distance measuring object on the left side of the screen is received by the left light receiving sensor 115, and the output of the left light receiving sensor 115 is sent to the processing circuit 118. (At descending integration time T1), and the distance Dl (from the data group Data1) to the object to be measured at the distance measuring point on the left side of the screen is obtained. (For example, the time required for this step is about T1 + rise integration time = 30 mS.)
[0063]
In step 43, the final distance measurement data is determined to be closest to the distance measurement result Dc at the center distance measurement point on the screen, the distance measurement result Dr at the distance measurement point on the right side of the screen, and the distance measurement result D1 at the distance measurement point on the left side of the screen. Select the desired one and finish the ranging sequence.
[0064]
As described above, when the first distance measurement point is within the predetermined distance range, the second distance measurement point and the subsequent distance measurement points are not used unless they are closer than the first distance measurement point. However, since the distance is short, the reflected light of the signal light after the second distance measurement point is sufficiently large even if the integration time is shortened (the integration amount is small) as described above, and the received light signal is buried in noise. No (high reliability), and the time required for the distance measurement operation can be further shortened without reducing the distance measurement performance.
[0065]
In this embodiment, the time to be changed is the descending integration time, and the difference in the integration time is described so as to correspond (correct) the distance calculation by switching the data group, but the present invention is not limited thereto. However, there is no problem even if the circuit configuration is changed, for example, the ascending integration time is changed, or the information such as the control time without the data group is obtained only by calculation.
[0066]
(Correspondence between Invention and Embodiment)
In the above embodiment, the left light receiving sensor / center light receiving sensor / right light receiving sensor 115 to 117, the processing circuit 118, the right IRED / center IRED / left IRED 119 to 121, and the drivers 122 to 124 are used as the detection means of the present invention. The drive circuit 127 corresponds to the focus adjusting means of the present invention, the microcomputer 114 corresponds to the control means or signal processing means of the present invention, and the operational amplifier 47 and the integrating capacitor 48 correspond to the integrating means of the present invention.
[0067]
The above is the correspondence between each configuration of the embodiment and each configuration of the present invention. However, the present invention is not limited to the configuration of the embodiment, and the functions or the embodiments described in the claims are described. Any configuration can be applied as long as the functions of the configuration can be achieved.
[0068]
For example, in the above embodiment, the distance measurement point at the center of the screen is measured, and then one distance measurement point around the screen is measured and compared. The present invention can be applied even if the ranging order is reversed.
[0069]
Further, in the above embodiment, the sequence is such that the right distance measuring point on the screen is measured before the left distance measuring point. The present invention can be applied to any number of points as long as the number is two or more.
[0070]
Further, the present invention can be applied to any distance-related information as long as the distance between distance measurement points is not an absolute distance as long as the distance can be compared, such as defocus information.
[0071]
In the present invention, focus adjustment is performed based on information that is different from information related to the distance to be compared between distance measuring points, and information detected by a detection system that is different from information related to distance to be compared between distance measuring points. You may do it. Note that the distance-related information in the present invention includes defocus information.
[0072]
The field of view in the present invention is a shooting screen in the camera, but if it is another optical device, it is the field of view of the optical device, and the central part and the peripheral part of the field of view are relative to the field of view. Relative position, not exact. Therefore, in the embodiment, the peripheral distance measuring points are set to the right and left sides of the shooting screen. This is because the peripheral points in various directions with respect to the central location, such as right upper or lower and left upper or lower. The location can be determined as needed.
[0073]
In addition, the focus adjustment in the present invention is not limited to the automatic adjustment, but includes the case where the user performs the manual operation by looking at the display.
[0074]
In the above embodiment, one distance measurement point is selected from a plurality of distance measurement points and focus adjustment is performed on the distance measurement point. However, the present invention simply selects one distance measurement point. The present invention can be applied if priority is given to a selected distance measuring point, such as performing focus adjustment by weighting, including other distance measuring points, instead of selecting.
[0075]
In the present invention, the reference of the comparison value has a width that is determined as necessary.
[0076]
In addition, the software configuration and the hardware configuration in the above embodiment can be appropriately replaced.
[0077]
Moreover, you may make it this invention combine the above-mentioned each embodiment or those technical elements as needed.
[0078]
Further, the present invention provides a device that can be used regardless of whether the whole or a part of the structure of the claims or the embodiments forms one device or is combined with another device. It may be a constituent element.
[0079]
In addition, the present invention is applied to various types of cameras such as a single-lens reflex camera, a lens shutter camera, and a video camera, optical devices other than the cameras, and other devices, and further those cameras, optical devices, and other devices. The present invention can also be applied to devices or elements constituting them.
[0080]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a focus adjustment device and a focus adjustment signal processing device that can reduce the time required for focus adjustment without lowering the focusing rate with respect to a target object. Is.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a camera according to an embodiment of the present invention.
FIG. 2 is a main flowchart of the microcomputer of FIG.
FIG. 3 is a flowchart of ranging operation of the microcomputer of FIG.
FIG. 4 is a specific configuration diagram of the processing circuit of FIG. 1;
5 is an integrated output waveform diagram of the focus adjustment device of FIG.
FIG. 6 is a control flowchart of the ranging operation of the microcomputer of FIG. 1 according to the second embodiment of the present invention.
[Explanation of symbols]
114 Microcomputer
115-117 sensor
118 Processing circuit
119-121 IRED
122-124 IRED driver
A1, A2 Current-voltage converter
A3, A4 inverting amplifier
A5 Summing amplifier
40, 47 operational amplifier
48 Capacitor for integration
45, 46 Analog switch
50 Comparator

Claims (2)

Detecting means for detecting information corresponding to the distance to the object to be measured at a first point in the field of view and a plurality of points closer to the field of view than the first point ;
Focus adjusting means for performing focus adjustment based on the detection result of the detecting means;
When it is detected that the distance to the object to be measured at the second point among the plurality of points at the edge of the field of view is longer than the distance to the object to be measured at the first point, Control means for controlling to perform focus adjustment based on a detection result at the first point without performing detection at a point other than the second point among a plurality of end points. Focusing device. When the distance to the object to be measured at the first point and the second point is regarded as the same distance, the control means focuses based on the detection result at the second point . 2. The focus adjusting apparatus according to claim 1, wherein the focus adjusting means is operated.

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