JP2006146067A - Camera, lens device and camera system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera selecting autofocusing function characteristic by changing lens driving characteristic according to user's purpose or the mode of a camera, because lens driving time gets long and the speed of an autofocusing function gets low in order to make the accuracy of a lens stop position high, on the contrary, the lens driving time gets short and the speed of the autofocusing function gets high if the accuracy of the lens stop position is moderated, and to provide a lens device and a camera system. <P>SOLUTION: A deceleration control pattern is changed according to a selected state by a lens control selection means or an AF selection means or a photographing mode selection means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a camera, a lens apparatus, and a camera system that perform lens drive control.

  2. Description of the Related Art Conventionally, a camera system including an imaging lens that has an autofocus function and is interchangeable with a camera has been widely used.

  The autofocus function is a function for automatically focusing, and there is a camera having a servo AF function that can keep focusing on a moving subject.

  In a single-lens reflex camera, as a method of an autofocus function, a focus shift unit detects a phase shift amount of a subject image divided into two images by a focus detection unit, and corresponds to this focus shift amount. A system is mainly employed in which the lens is driven by the moving amount of the lens, and focusing is performed when the amount of focus deviation after driving becomes less than an allowable value.

  The autofocus function is basically desired to be fast and have high focus accuracy, but it is also necessary to select the autofocus function characteristics according to the user's application or camera mode.

  For example, in the above-described servo AF function, it is necessary to give priority to the speed in order to cope with the fast movement of the subject, but in order to obtain a good result even when the image is stretched, it is necessary to achieve a high focus accuracy.

  Also, in a sport mode in which a fast-moving subject is shot with a low shutter speed to shoot in order to suppress blurring, a photo opportunity is not missed for a fast-moving subject compared to other shooting modes. Therefore, it is necessary to give priority to speed.

  There are other examples in which the autofocus function characteristic is selected according to the application. For example, Patent Document 1 proposes a camera that has a panoramic shooting mode and a trimming shooting mode that are different in magnification from normal shooting in the normal shooting mode, and aims to obtain high focus accuracy in both modes. .

  Further, Patent Document 2 proposes an autofocus device for the purpose of being able to be mounted on cameras having different required focusing accuracy.

In addition, an interchangeable lens that can be used in common for a single-lens reflex camera and a video camera and has a focus detection unit is proposed in Patent Document 3 for the purpose of maintaining the focus detection accuracy necessary for both cameras. ing.
Japanese Patent Laid-Open No. 7-281084 JP-A-9-252424 JP 2000-98475 A

  As described above, in the autofocus function system of a single-lens reflex camera, the lens is driven and focused by the amount of movement of the lens corresponding to the detected amount of focus shift, so the lens driving characteristics greatly affect the autofocus function characteristics.

  The final focus accuracy depends on the lens stop position accuracy. Further, the speed of the autofocus function depends on the lens driving time. In order to increase the lens stop position accuracy, it is necessary to sufficiently decelerate and stop the lens when it is stopped. Therefore, in order to increase the lens stop position accuracy, the lens drive time becomes longer and the speed of the autofocus function becomes slower. Conversely, if the lens stop position accuracy is relaxed, the lens drive time becomes shorter and the speed of the autofocus function becomes faster. Will be faster.

  Therefore, in order to effectively change the autofocus function characteristic, the lens drive characteristic must be changed.

  The camera proposed in Patent Document 1 aims to obtain high focus accuracy in any of the normal shooting mode and the panoramic shooting mode or the trimming shooting mode, and the normal shooting mode is different from the panoramic shooting mode or the trimming shooting mode. Sometimes, the number of times of autofocus distance measurement is reduced, or the determination level for determining focus is reduced.

  In addition, the autofocus function proposed in Patent Document 2 is provided with an external input means for changing the level at which focusing is determined by an external input for the purpose of being able to be mounted on a camera having different required focusing accuracy. It is a thing.

  The interchangeable lens proposed in Patent Document 3 is an interchangeable lens that can be used in common for a single-lens reflex camera and a video camera and is provided with a focus detection unit, and is intended to maintain the focus detection accuracy necessary for both cameras. In addition, an operation parameter related to focus adjustment such as a focus determination allowable level is changed according to camera information such as an allowable focus range, a shooting mode, and an AF mode.

  In these examples, focus accuracy is controlled by changing operation parameters related to an autofocus function such as a focus determination allowable level. Therefore, the lens drive characteristics must be those required for higher focus accuracy, and the lens drive time will not be shortened even if the operating parameters related to focus adjustment, such as the focus determination allowable level, are relaxed. The speed of the function cannot be greatly reduced.

  The present invention has been made based on the above circumstances, and a camera, a lens apparatus, and a camera system that can select an autofocus function characteristic by changing a lens driving characteristic in accordance with a user application or a camera mode. Is intended to provide.

  In order to achieve the above object, in the camera, lens apparatus, and camera system according to the first aspect of the present invention, a photographing optical system including a focus adjustment lens, drive means for driving the focus adjustment lens, and predetermined deceleration control Control means for controlling the drive means to move the focus adjustment lens to the target position by performing deceleration control according to the pattern, and lens control selection means, AF selection means or photographing mode selection means are provided, and the control means is provided with lens control selection means Alternatively, the deceleration control pattern is changed according to the selection state by the AF selection means or the shooting mode selection means.

  For example, when the drive means is decelerated toward a stop, a deceleration control pattern that decelerates so that the deceleration rate immediately before the stop is greater when the lens control selection means is selected in the high-speed mode than in the high-precision mode. Set.

  In addition, when the drive unit is decelerated toward the stop, when the selection by the AF selection unit is in the servo AF mode, the deceleration control is performed so that the deceleration rate immediately before the stop is larger than in the other AF modes. Set the pattern.

  Also, when the driving means is decelerated toward the stop, when the selection by the shooting mode selection means is the sports mode, the deceleration control is performed so that the deceleration rate immediately before the stop is larger than in the other shooting modes. Set the pattern.

  In the second invention of the present invention, a photographing optical system including a focus adjustment lens, a drive means for driving the focus adjustment lens, a position detection means for detecting the position of the focus adjustment lens, and the focus adjustment lens Control means for controlling the driving means so as to stop at the target position by performing deceleration control when the difference between the position and the detection position by the position detecting means becomes a predetermined value or less, and lens control selecting means or AF selecting means or photographing A mode selection unit is provided, and the control unit is configured to change the predetermined value according to a selection state by the lens control selection unit, the AF selection unit, or the photographing mode selection unit.

  For example, when the selection of the lens control selection means is in the high speed mode, the predetermined value is set smaller (that is, the deceleration start is delayed) than in the high accuracy mode.

  Further, when the selection by the AF selection means is in the servo AF mode, the predetermined value is set smaller than in the other AF modes.

  Further, when the selection by the shooting mode selection means is the sports mode, the predetermined value is set smaller than in the other shooting modes.

  According to these inventions, when the selection of the lens control selection unit is the high speed mode, the selection by the AF selection unit is the servo AF mode, and the selection by the shooting mode selection unit is the sports mode, the focus adjustment lens is It becomes possible to stop in a short time. On the other hand, when the selection of the lens control selection unit is the high accuracy mode, the selection by the AF selection unit is a mode other than the servo AF mode, and the selection by the shooting mode selection unit is a mode other than the sports mode, High stop position accuracy of the focus adjustment lens can be obtained. Therefore, auto focus function characteristics can be selected by changing the lens drive characteristics according to the user's application or camera mode (focus adjustment can be performed in a short time or highly accurate focus adjustment). Is possible.

  According to the present invention, it is possible to change the lens driving characteristics by selecting a lens control characteristic selection switch, an AF selection switch, or a photographing mode selection. Therefore, by changing the lens driving characteristic according to the user's application or the camera mode, it is possible to select the autofocus function characteristic.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

(First embodiment)
FIG. 1 shows the configuration of a lens-integrated camera according to the first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a camera. In the camera 1, a photographing optical system including a focusing lens 2, a zooming lens 3, and a diaphragm 4 is provided.

  Reference numeral 5 denotes a zoom brush that slides on a resistor (not shown) as the zooming lens 3 moves in order to detect the position of the zooming lens 3, and outputs a signal having a voltage value corresponding to the position of the zooming lens 3. To do. Reference numeral 6 denotes a focus brush that slides on a resistor (not shown) as the focusing lens 2 moves in order to detect the position of the focusing lens 2, and a voltage value signal corresponding to the position (zone) of the focusing lens 2 Is output.

  Reference numeral 7 denotes a photometric unit that measures the amount of light that has passed through the photographic optical system, and reference numeral 8 denotes a shutter that controls the exposure time of the photographic film. A feeding charge system 9 feeds the photographic film and charges the shutter 8. Reference numeral 10 denotes a CPU as a control circuit that controls various controls in the camera 1. Reference numeral 18 denotes a lens control characteristic selection switch for selecting a lens control characteristic, which selects a high accuracy mode for obtaining a lens control characteristic for obtaining high lens stop position accuracy and a high speed mode for obtaining a lens control characteristic for obtaining a short lens driving time. To do.

  11 is a focus detection unit for measuring the distance from the photographic film surface to the subject, 12 is a power supply, 13 is a lens drive unit for driving the focus drive motor 14 in response to a command signal from the CPU 10, and 15 is the CPU 10. This is an aperture drive unit that drives the aperture drive motor 16 in response to a command signal from the motor.

  Further, the camera 1 of the present embodiment is provided with a pulse generator 17 that generates a pulse signal as the focusing lens 2 moves. The pulse generator 17 includes, for example, a pulse plate that rotates with the movement of the focusing lens 2 and has a plurality of slit portions formed on a disk, and a slit portion and a non-slit portion that are formed by the rotation of the pulse plate. The photo interrupter is configured to output a pulse signal by light transmission and light shielding.

  Next, lens driving processing related to the automatic focus adjustment operation of the camera (mainly the CPU 10) of this embodiment will be described using the flowcharts of FIGS. In FIGS. 2 to 5, the parts with the same circled numbers are connected to each other.

  FIG. 2 is a flowchart from the operation of the shooting preparation switch in the camera to the start of driving of the focusing lens 2.

"Step (abbreviated as s in the figure) 101"
When a shooting preparation switch (not shown) is operated, the CPU 10 starts this processing.

"Step102"
The CPU 10 causes the focus detection unit 11 to detect the focus adjustment state (focus detection) of the photographing optical system.

"Step103"
The CPU 10 calculates the defocus amount from the focus detection result obtained in step 102.

"Step 104"
The CPU 10 calculates the amount (target position) to drive the focusing lens 2 from the defocus amount obtained in step 103 to the in-focus position. This amount is calculated as the amount of the pulse signal generated by the pulse generator 17. This amount is stored as FOPC in a memory (not shown) in the CPU 10.

"Step105"
The CPU 10 reads the current pulse count value and stores it in the memory as FPC0. The pulse signal output from the pulse generator 17 is counted by the CPU 10 and can be read as a pulse count value. In addition, when a pulse signal is input, a pulse width measurement timer for measuring the time since the previous pulse signal input is provided, and the pulse width is measured.

"Step106"
The CPU 10 reads data representing the target driving speed of the focusing lens 2 stored in the ROM in the CPU 10. The target speed is stored as the pulse width (T-SPD) of the pulse generated by the pulse generator 17, and a predetermined value is stored according to the brightness of the subject and the focal length of the lens.

"Step 107"
The CPU 10 outputs a control signal to the lens driving unit 13 to drive the lens driving motor 14. Thereby, the driving of the focusing lens 2 is started.

  When control of the focusing lens 2 is started, acceleration control is first performed so that the target speed is reached, and the remaining drive amount (difference between the number of pulses corresponding to the target position and the current pulse count value) is a predetermined amount (deceleration pulse). ) The target speed is reduced when the following is reached, and the lens drive motor 14 is stopped when the target position is reached.

  Next, control from the start to the end of driving of the focus lens will be described in detail with reference to FIGS.

"Step108"
The CPU 10 determines whether or not a pulse signal is input from the pulse generator 17. If a pulse signal has been input, the process proceeds to step 109. If not, the process proceeds to 120.

"Step109"
Since it is determined in step 108 that a pulse signal is input, the pulse count value indicating the current position changes. Therefore, the CPU 10 acquires a pulse count value FPC indicating the current position.

"Step110"
Since the pulse signal is input at step 108, the CPU 10 reads the measured value of the pulse width (R-SPD).

"Step111"
The CPU 10 resets the value of the pulse width measurement timer and starts again so that the measured value of the pulse width can be obtained when the next pulse signal is input.

"Step 112"
The CPU 10 confirms the stop process in progress flag. If it is set, the CPU 10 determines that the stop process is in progress and returns to step 108 ". If it has been reset, the process proceeds to step 113.

"Step113"
The CPU 10 performs a target drive speed setting process. Specifically, it is determined whether (FOPC + FPC0) −FPC, which is the remaining drive amount to the target stop position, is equal to or less than a predetermined deceleration pulse for starting the deceleration process. A new T-SPD is acquired to change the driving speed. If it is less than the deceleration pulse, the target speed is updated to decelerate and stop. A method of changing the target speed, that is, the deceleration control pattern in this process will be described later with reference to FIG.

"Step114"
The CPU 10 compares the pulse width R-SPD corresponding to the current driving speed acquired in step 110 with the pulse width T-SPD corresponding to the target speed, and if the R-SPD is larger, the process proceeds to step 116, otherwise. Proceed to Here, since R-SPD and T-SPD are data of pulse width, the fact that R-SPD is larger means that the current speed is slower than the target speed.

"Step 115"
The CPU 10 compares the R-SPD and the T-SPD, and proceeds to step 117 if the R-SPD is smaller, and returns to step 108 otherwise.

"Step 116"
Since it is determined in step 114 that the current driving speed is slower than the target speed, the CPU 10 performs a speed-up process in order to increase the speed of the focusing lens 2. Here, the speed-up process differs depending on the type of the lens drive motor 14, but in this embodiment, a DC motor is used as the lens drive motor 14, so the speed is increased by increasing the voltage supplied to the motor 14. increase.

  Specifically, when the current speed is compared with the target speed in step 114, the difference is stored, and the voltage increase is determined according to the value to change the voltage. As a result, when the difference from the target speed is large, the voltage increase range can be increased, and when the difference is small, the increase range can be decreased, so that the target speed can be reached more quickly. If the brake is being applied, the brake is released and the above processing is performed.

"Step 117"
Since it is determined in step 115 that the current drive speed is faster than the target speed, the CPU 10 performs a speed-down process in order to reduce the speed of the focusing lens 2. Here, a case where the motor is a DC motor and is used by voltage control will be described. In the present embodiment, the speed is lowered by lowering the voltage supplied to the lens driving motor 14 or applying a brake.

  Specifically, when the current speed is compared with the target speed at step 115, the difference is stored, and it is determined whether to apply the brake or reduce the voltage according to the value. The amount of decrease in voltage is determined by the difference value to change the voltage. As a result, when the difference with the target speed is large, the speed is drastically reduced by the brake, and when the difference is small, the speed can be adjusted by controlling the voltage so that the speed can be lowered to the target speed more quickly. It becomes.

"Step 118"
The CPU 10 determines whether or not (FOPC + FPC0) −FPC which is the remaining drive amount is zero. If 0, the process proceeds to step 119, and if there is still a remaining drive amount, the process returns to step 108.

"Step119"
Since the target position has been reached, the CPU 10 applies a brake to stop the focusing lens.

"Step 120"
The CPU 10 sets a flag indicating that the stop process is being performed, and returns to the process of step 108. The processing after the stop processing is in progress is for monitoring whether or not a pulse is input while the brake is applied, and confirming whether or not the target position is overrun. When overrun occurs, the amount is recognized and used to determine whether to perform focus detection again.

"Step 121"
The CPU 10 reads R-TIM which is the current value of the pulse width measurement timer. This R-TIM represents the time from the previous pulse input from the pulse generator 17 to the present time.

"Step122"
The CPU 10 confirms the stop processing flag, and if it is set, the CPU 10 determines that the stop processing is in progress and proceeds to step 123, and if it is reset, proceeds to step 124.

"Step123"
Since it is determined in step 122 that stop processing is being performed, the CPU 10 compares R-TIM and STOP-TIM. R-TIM is the pulse width of the pulse signal from the pulse generator 17, and STOP-TIM is a value at which it can be determined that the focus lens has stopped if the pulse width exceeds this value. If R-TIM is smaller than STOP-TIM, the process returns to step 108 to wait for pulse input, and if R-TIM is greater than or equal to STOP-TIM, the process proceeds to step 125.

"Step124"
Since it is determined that the drive is still in progress, the CPU 10 compares R-TIM and UP-TIM. If R-TIM is smaller than UP-TIM, the process returns to step 108 and waits for input of the pulse. Proceeding to step 116, speed-up processing is performed. This is a process for preventing the speed from becoming too slow despite being driven.

"Step125"
The CPU 10 determines that the focus lens has stopped, and performs drive stop processing.

"Step 126"
The process of this flow is terminated.

  Next, a subroutine for target pulse width setting processing performed in step 113 will be described with reference to FIG.

"Step 127"
The CPU 10 determines whether (FOPC + FPC0) −FPC, which is the remaining drive amount to the target position, is equal to or less than the deceleration pulse. If it is equal to or less than the deceleration pulse, the process proceeds to step 128. Otherwise, the target pulse width setting process is terminated, and the process proceeds to step 114 of the main flow.

"Step128"
The CPU 10 determines whether the high accuracy mode is selected or the high speed mode is selected by the lens control characteristic selection switch 18.
When it is in the high accuracy mode, the process proceeds to step 130, and when it is determined that it is in the high speed mode, the process proceeds to step 129.

"Step 129"
Since the high speed mode is determined in step 128, the CPU 10 reads and sets the target speed pulse width data (T-SPD) from the high speed mode deceleration data table (deceleration control pattern).

"Step 130"
Since the high accuracy mode is determined in step 128, the CPU 10 reads and sets the target speed pulse width data (T-SPD) from the high speed mode deceleration data table (deceleration control pattern).

  Here, FIG. 6 shows a deceleration data table in the high speed mode and the high accuracy mode. The horizontal axis represents the remaining drive amount, and the vertical axis represents the target drive speed (pulse width data). As shown in this figure, in this embodiment, in the high-speed mode, the deceleration rate up to a predetermined remaining drive amount (immediately before stopping) close to the stop position is made smaller than that on the telephoto side, and then the speed is increased. The deceleration data table is set so that it is suddenly lowered and stopped.

  This is to shorten the drive time even if an overrun with respect to the target position occurs.

  On the other hand, in the high-accuracy mode, the deceleration data table is set so that the deceleration rate up to a predetermined remaining drive amount (immediately before the stop) close to the stop position is increased, and then the speed is gradually decreased to stop. Thus, high stop position accuracy can be obtained in the high accuracy mode.

  As described above, in this embodiment, the lens control characteristic selection switch for selecting the high accuracy mode and the high speed mode is provided, and the speed control data (deceleration control pattern) at the time of the deceleration control is changed according to this selection state. Therefore, the driving time of the focusing lens can be shortened by keeping the stop position accuracy high in the high-accuracy mode and easing the stop position accuracy and speeding up the drive stop in the high-speed mode.

  In this embodiment, there are two lens control characteristic selections for changing the deceleration data at the time of deceleration control. However, there are a plurality of lens control characteristic selections for changing the deceleration data table, and the deceleration data is set more finely. Is also possible.

  In this embodiment, the case where the lens drive motor is accelerated and decelerated by voltage control using a DC motor as the lens drive motor has been described. However, by applying different two-phase frequency voltages to the piezoelectric element, vibration is excited in the vibrator and contact is made. A vibration type motor that relatively moves the body may be used. In this case, acceleration / deceleration is performed by controlling the frequency, voltage value, and phase difference of the frequency voltage.

(Second Embodiment)
The automatic focus adjustment processing operation in the lens-integrated camera according to the second embodiment of the present invention will be described with reference to FIGS. Since the processes shown in FIGS. 2 to 5 have been described above, description thereof will be omitted, and only FIGS. 7 and 8 will be described.

  FIG. 7 shows the configuration of a lens-integrated camera according to the second embodiment of the present invention. In the figure, the same symbols as in FIG. 1 have the same functions. Reference numeral 19 denotes an AF selection switch for selecting a distance measurement mode. When a shooting preparation switch (not shown) is operated, a single AF mode that performs distance measurement only once, and while the shooting preparation switch is operated, Servo AF that continues distance measurement according to the movement of the subject is selected.

  FIG. 8 is a flowchart of the subroutine of the target pulse width setting process (step 113) in FIG.

"Step 131"
The CPU 10 determines whether (FOPC + FPC0) −FPC, which is the remaining drive amount to the target position, is equal to or less than the deceleration pulse. If it is less than the deceleration pulse, the process proceeds to step 132. Otherwise, the target pulse width setting process is terminated, and the process proceeds to step 114 of the main flow.

"Step132"
When the CPU 10 determines whether the single AF mode is selected by the AF selection switch 19 or the servo AF mode is selected, the CPU 10 proceeds to step 133 when the servo AF mode is selected, and determines that the single AF mode is selected. To step 134.

"Step 133"
Since the single AF mode is determined in step 132, the CPU 10 reads and sets the target speed pulse width data (T-SPD) from the single AF mode deceleration data table (deceleration control pattern).

"Step 134"
Since the servo AF mode is determined in step 132, the CPU 10 reads and sets the target speed pulse width data (T-SPD) from the deceleration data table (deceleration control pattern) in the servo AF mode.

  Here, the deceleration data table in the single AF mode and the servo AF mode is shown in FIG. The horizontal axis represents the remaining drive amount, and the vertical axis represents the target speed (pulse width). As shown in FIG. 9, in the present embodiment, in the servo AF mode, the deceleration rate up to a predetermined remaining drive amount close to the stop position (immediately before the stop) is made smaller than in the single AF mode, and the speed thereafter It is set to stop by suddenly lowering.

  This is to shorten the drive time even if an overrun with respect to the target position occurs.

  On the other hand, in the single AF mode, the deceleration data table is set so that the deceleration rate up to a predetermined remaining drive amount (immediately before the stop) close to the stop position is increased, and then the speed is gradually decreased to stop. Thereby, in the single AF mode, high stop position accuracy can be obtained.

  As described above, in this embodiment, the speed control data (deceleration control pattern) at the time of deceleration control is changed according to the AF selection switch for selecting the single AF mode and the servo AF mode. In the mode, the stop position accuracy is kept high, and in the servo AF mode, the stop position accuracy is relaxed and the drive stop is advanced, so that the driving time of the focusing lens can be shortened.

  In this embodiment, the case where the lens drive motor is accelerated and decelerated by voltage control using a DC motor as the lens drive motor has been described. However, by applying different two-phase frequency voltages to the piezoelectric element, vibration is excited in the vibrator and contact is made. A vibration type motor that relatively moves the body may be used. In this case, acceleration / deceleration is performed by controlling the frequency, voltage value, and phase difference of the frequency voltage.

  Further, although detailed description is omitted, there is provided photographing mode selection means for selecting a photographing mode including a sports mode for photographing with a short shutter speed, and speed control data (deceleration control pattern) at the time of deceleration control according to the photographing mode. (Decelerate the deceleration pattern in the sport mode until the predetermined remaining drive amount close to the stop position (immediately before the stop) is smaller than in other shooting modes, and then rapidly decrease the speed. Can be set to stop).

(Third embodiment)
The automatic focus adjustment processing operation in the lens-integrated camera according to the third embodiment of the present invention will be described with reference to FIGS. Since the processes shown in FIGS. 2 to 5 have been described above, description thereof will be omitted and only the flowchart of FIG. 10 will be described.

  The configuration of the camera to which this embodiment is applied is the same as that of the camera of the first embodiment.

  FIG. 10 is a flowchart of the subroutine of the target pulse width setting process (step 113) in FIG.

"Step 135"
The CPU 10 determines whether the high accuracy mode is selected or the high speed mode is selected by the lens control characteristic selection switch 18. When it is in the high accuracy mode, the process proceeds to step 137, and when it is determined that it is in the high speed mode, the process proceeds to step 136.

"Step 136"
Since the high speed mode is determined in step 135, the CPU 10 sets the deceleration pulse (predetermined value) as the high speed mode deceleration pulse.

"Step 137"
Since it is determined in step 135 that the high accuracy mode is selected, the CPU 10 sets the deceleration pulse (predetermined value) to the high accuracy mode deceleration pulse. These high-speed mode and high-accuracy mode deceleration pulses will be described later.

"Step 138"
The CPU 10 determines whether (FOPC + FPC0) −FPC, which is the remaining drive amount to the target position, is equal to or less than the deceleration pulse set in step 136 or step 137. If it is less than the deceleration pulse, the process proceeds to step 139. Otherwise, the target pulse width setting process is terminated, and the process proceeds to step 114 of the main flow.

"Step 139"
Since it is determined that the remaining drive amount is equal to or less than the deceleration pulse, the CPU 10 acquires a new T-SPD in order to change the target speed. Thereby, when the remaining drive amount becomes equal to or less than the deceleration pulse, the deceleration speed is started and the target speed is updated so as to stop at the target position.

  Here, the deceleration data in the high speed mode and the high accuracy mode are shown in FIG. The horizontal axis represents the remaining drive amount, and the vertical axis represents the target speed (pulse width).

  As shown in FIG. 11, in the present embodiment, in the high speed mode, the deceleration pulse (predetermined value) is set so as to start the deceleration control from a position where the remaining drive amount is small compared to the high accuracy mode. Actually, the speed is suddenly reduced and stopped.

  This is to shorten the drive time even if an overrun with respect to the target position occurs.

  On the other hand, in the high-accuracy mode, the deceleration pulse (predetermined value) is set so as to start the deceleration control from a position where the remaining drive amount is large. Therefore, the speed is actually lowered and stopped. Thus, high stop position accuracy can be obtained in the high accuracy mode.

  As described above, in the present embodiment, the lens control characteristic selection switch for selecting the high accuracy mode and the high speed mode is provided, and the remaining drive amount for starting the deceleration control is changed according to this selection state. In the high-accuracy mode, the stop position accuracy is kept high, and in the high-speed mode, the stop position accuracy is relaxed and the drive stop is accelerated, so that the driving time of the focusing lens can be shortened.

  Although two lens control characteristic selections are made, it is possible to make more detailed settings by selecting a plurality of lens control characteristic selections for changing the remaining drive amount for starting deceleration control.

  In this embodiment, the case where the lens drive motor is accelerated and decelerated by voltage control using a DC motor as the lens drive motor has been described. However, by applying different two-phase frequency voltages to the piezoelectric element, vibration is excited in the vibrator and contact is made. A vibration type motor that relatively moves the body may be used. In this case, acceleration / deceleration is performed by controlling the frequency, voltage value, and phase difference of the frequency voltage.

  The control for changing the deceleration data table according to the lens control characteristic selection described in the first embodiment and the remaining drive for starting the deceleration control according to the lens control characteristic selection described in the present embodiment. It is also possible to combine with control for changing the amount.

  Although not described in detail, as in the second embodiment, the remaining drive amount for starting the deceleration control is changed according to the AF selection switch for selecting the single AF mode and the servo AF mode (in the servo AF mode). The remaining drive amount for starting the deceleration control can be made smaller than the remaining drive amount for starting the deceleration control in the single AF mode).

  Furthermore, combining the control for changing the deceleration data table according to the AF selection switch and the control for changing the remaining drive amount for starting the deceleration control according to the AF selection switch described above in the second embodiment. Is also possible.

  Although not described in detail, as in the second embodiment, there is provided shooting mode selection means for selecting a shooting mode including a sports mode in which the shutter speed is set short and shooting is performed, and deceleration control is started according to the shooting mode. The remaining drive amount can be changed (the remaining drive amount for starting the deceleration control in the sport mode is made smaller than the remaining drive amount for starting the deceleration control in the shooting mode).

  Furthermore, combining the control for changing the deceleration data table according to the shooting mode selection described in the second embodiment and the control for changing the remaining drive amount for starting the deceleration control according to the shooting mode selection described above. Is also possible.

(Fourth embodiment)
FIG. 12 illustrates a camera system that is a fourth embodiment of the present invention. This camera system includes a camera and a photographing lens (lens device) that can be attached to and detached from the camera.

  In FIG. 12, reference numeral 201 denotes a camera, and 202 denotes a photographing lens that can be attached to and detached from the camera 201.

  In the camera 201, 203 is an electric circuit. The electric circuit 203 includes a photometric unit 204 for measuring the amount of light that has passed through the photographing optical system of the photographing lens 202, a focus detection unit 205 for detecting the focus adjustment state of the photographing optical system of the photographing lens 202, and photographing. Serial communication is performed with a shutter 206 for controlling the exposure time on the film, a feeding / charging system 207 for winding and rewinding the film, a camera CPU 208 for controlling various controls in the camera 201, and the photographing lens 202. A communication circuit 209 is provided. Reference numeral 225 denotes an AF selection switch for selecting a distance measurement mode. A single AF mode that performs distance measurement only once when a shooting preparation switch (not shown) is operated, and while the shooting preparation switch is operated, Servo AF that continues distance measurement according to the movement of the subject is selected. In addition, a power source 210 is provided in the camera 201, and the power source 210 also supplies power to the taking lens 202.

  In the photographing lens 202, 211 is a focusing lens, 212 is a zooming lens, and 213 is a stop.

  The photographing lens 202 has a photographing optical system that includes the focusing lens 211, the zooming lens 212, and the aperture 213.

  Reference numeral 214 denotes a zoom brush that slides on a resistor (not shown) as the zooming lens 212 moves in order to detect the position of the zooming lens 212, and outputs a signal having a voltage value corresponding to the position of the zooming lens 212. . Reference numeral 215 denotes a focus brush that slides on a resistor (not shown) as the focusing lens 211 moves in order to detect the position (zone) of the focusing lens 211, and a voltage value signal corresponding to the position of the focusing lens 211. Is output.

  Reference numeral 216 denotes an A / M switch for switching between auto focus and manual focus, and 217 denotes an electric circuit in the photographing lens 201. Reference numeral 226 denotes a lens control characteristic selection switch for selecting a lens control characteristic, which selects a high accuracy mode for obtaining a lens control characteristic for obtaining a high lens stop position accuracy and a high speed mode for obtaining a lens control characteristic for obtaining a short lens driving time. To do.

  The electric circuit 217 includes a communication circuit 218 for performing serial communication with the camera 201, a lens CPU 219 that controls the inside of the photographing lens 202, and a focus that drives the focusing lens 211 in accordance with a control signal from the lens CPU 219. A lens drive unit 220 that performs drive control of the drive motor 223 and an aperture drive unit 222 that performs drive control of the aperture drive motor 223 that drives the aperture 213 in accordance with a control signal from the lens CPU 219 are provided. In addition, a pulse generator 224 that outputs a pulse signal as the focusing lens 211 moves is provided in the photographing lens 202. This pulse generator 224 is the same as the pulse generator 17 described in the first embodiment.

  Next, the automatic focus adjustment processing operation in the camera system of the present embodiment will be described using the flowcharts of FIGS.

  Processing on the camera side (mainly the camera CPU 208) in the camera system of the present embodiment will be described with reference to FIG.

"Step201"
When a shooting preparation switch (not shown) is operated, the camera CPU 208 starts processing of this flow.

"Step202"
The camera CPU 208 causes the focus detection unit 205 to detect the focus adjustment state (focus detection) of the photographing optical system.

"Step 203"
The camera CPU 208 calculates the defocus amount from the focus detection result obtained in step 202.

"Step204"
The camera CPU 208 determines whether or not the defocus amount obtained in step 203 is within the in-focus range. If it is within the focus range, the process proceeds to step 209, and if it is outside the focus range, the process proceeds to step 205. Here, the in-focus range is based on the fact that the amount of focus shift is within the allowable circle of confusion.

"Step205"
The camera CPU 208 calculates the amount (target position) to drive the focusing lens 211 from the defocus amount obtained in step 203 to the in-focus position. This amount is calculated as the amount of the pulse signal generated by the pulse generator 224. This amount is stored as FOPC in a memory (not shown) in the camera CPU 208.

"Step 206"
The camera CPU 208 outputs a focus drive command to the photographic lens side so as to drive the drive amount FOPC calculated in step 205 and the focus drive motor 221 by communication via the communication circuits 209 and 218.

"Step207"
The camera CPU 208 performs lens status communication by communication between the camera and the lens. With this communication, the driving state of the focusing lens 211 on the lens side is communicated to the camera side.

"Step208"
The camera CPU 208 determines from the lens status communication performed in step 207 whether or not the focusing lens 211 is being driven, and returns to step 207 if driven, and returns to step 202 if stopped.

"Step209"
Since the focus shift amount is determined to be within the focus range in step 203, the camera CPU 208 performs focus processing.

"Step210"
The camera CPU 208 ends the processing on the camera side until focusing is achieved.

  As described above, on the camera 201 side, focus detection and focusing lens driving are repeated until the amount of focus shift falls within the in-focus range.

  Next, processing on the photographing lens 202 side (mainly the lens CPU 219) will be described with reference to FIGS.

"Step211"
The lens CPU 219 receives a focus drive command from the camera side through communication between the camera and the lens.

"Step212"
The lens CPU 219 sets a focus driving flag, which is one of information transmitted by lens status communication in camera-lens communication. While this flag is set, the camera side determines that the focusing lens 211 is being driven.

"Step 213"
The lens CPU 219 stores the focus drive amount (FOPC) transmitted from the camera side in step 211 in a memory (not shown).

"Step 214"
The lens CPU 219 reads the current pulse count value and stores it in the memory as FPC0. The pulse signal output from the pulse generator 224 is counted by the lens CPU 219 and can be read as a pulse count value. In addition, a pulse width measurement timer for measuring the time from the previous pulse signal input is provided when the pulse signal is input, and the pulse width is measured.

"Step 215"
The lens CPU 219 determines whether a pulse signal is input from the pulse generator 224. If a pulse signal has been input, the process proceeds to step 216. If there is no input, the process continues to step 228.

"Step 216"
Since it is determined in step 215 that a pulse signal has been input, the pulse count value indicating the current position has changed. Therefore, the lens CPU 219 acquires a pulse count value FPC indicating the current position.

"Step 217"
Since the pulse signal is input in step 215, the lens CPU 219 reads the measured value (R-SPD) of the pulse width of the pulse signal output from the pulse generator 224.

"Step 218"
The lens CPU 219 resets the value of the pulse width measurement timer and starts again so that the measured value of the pulse width can be obtained when the next pulse signal is input.

"Step 219"
The lens CPU 219 confirms the stop processing flag. If it is set, the lens CPU 219 determines that the stop processing is in progress, returns to step 215, and if it is reset, proceeds to step 220.

"Step220"
The lens CPU 219 performs target drive speed setting processing. Specifically, it is determined whether (FOPC + FPC0) −FPC, which is the remaining drive amount to the target position, is equal to or less than a predetermined deceleration pulse for starting deceleration control. A new T-SPD is obtained to change. If it is less than the deceleration pulse, the target speed is updated to decelerate and stop.

"Step221"
The lens CPU 219 compares the pulse width R-SPD representing the current driving speed acquired in step 217 with the pulse width T-SPD representing the target speed, and if the R-SPD is larger, go to step 223, otherwise go to step 222. move on. Here, since R-SPD and T-SPD are data of pulse width, the fact that R-SPD is larger means that the current speed is slower than the target speed.

"Step222"
The lens CPU 219 compares the R-SPD and the T-SPD. If the R-SPD is smaller, the process proceeds to step 224. Otherwise, the process returns to step 215.

"Step223"
Since it is determined in step 221 that the current driving speed is slower than the target speed, the lens CPU 219 performs a speed-up process to increase the speed of the focusing lens 211. Here, the speed-up process varies depending on the type of the lens drive motor 221, but in this embodiment, a DC motor is used as the lens drive motor 221, so the speed is increased by increasing the voltage supplied to the motor 221. increase.

  Specifically, when the current speed and the target speed are compared in step 221, the difference is stored, and the voltage increase is determined according to the value, and the voltage is changed. As a result, when the difference from the target speed is large, the voltage increase range can be increased, and when the difference is small, the increase range can be decreased, so that the target speed can be reached more quickly. If the brake is being applied, the brake is released and the above processing is performed.

"Step224"
Since it is determined in step 222 that the speed is higher than the target speed, the lens CPU 219 performs a speed-down process in order to reduce the speed of the focusing lens 211.

  Here, a case where the motor is a DC motor and is used by voltage control will be described. In this embodiment, the speed is lowered by lowering the voltage supplied to the lens driving motor or applying a brake.

  Specifically, when the current speed is compared with the target speed at step 115, the difference is stored, and it is determined whether to apply the brake or reduce the voltage according to the value. The amount of decrease in voltage is determined by the difference value to change the voltage. As a result, when the difference with the target speed is large, the speed is drastically reduced by the brake, and when the difference is small, the speed can be adjusted by controlling the voltage so that the speed can be lowered to the target speed more quickly. It becomes.

"Step225"
The lens CPU 219 determines whether (FOPC + FPC0) −FPC, which is the remaining drive amount, is zero. If the remaining drive amount is 0, the process proceeds to “step 226”. If there is still the remaining drive amount, the process returns to step 215 ”.

"Step 226"
Since the target position has been reached, the lens CPU 219 applies a brake to stop the focusing lens 211 (focus drive motor 221).

"Step 227"
The lens CPU 219 sets a flag indicating that the stop process is being performed, and returns to step 215. The processing after the stop processing is in progress is for monitoring whether or not a pulse is input while the brake is applied, and confirming whether or not the target position is overrun. When overrun occurs, the amount is recognized and used to determine whether to perform focus detection again.

"Step228"
The lens CPU 219 reads R-TIM, which is the current value of the pulse width measurement timer. This R-TIM represents the time from the previous pulse input to the present time.

"Step 229"
The lens CPU 219 confirms the stop processing flag, and if it is set, determines that the stop processing is in progress, proceeds to step 230 ", and if reset, proceeds to step 231.

"Step230"
The lens CPU 219 compares R-TIM and STOP-TIM because it is determined in step 229 that stop processing is being performed. STOP-TIM is a value with which it can be determined that the focusing lens 211 has stopped when the R-TIM is greater than this.

  If R-TIM is smaller than STOP-TIM, the process returns to step 215 to wait for input of a pulse, and if R-TIM is equal to or greater than STOP-TIM, the process proceeds to step 232.

"Step231"
Since it is determined that the lens is still being driven, the lens CPU 219 compares R-TIM with UP-TIM, and if R-TIM is smaller than UP-TIM, the process proceeds to step 215 and waits for input of a pulse. If so, the process proceeds to step 223 to perform speed-up processing. This is a process for preventing the speed from becoming too slow despite being driven.

"Step 232"
The lens CPU 219 determines that the focusing lens 211 has stopped, and performs drive stop processing.

"Step 233"
The lens CPU 219 resets a focus driving flag, which is one piece of information transmitted by lens status communication in camera-lens communication. While this flag is reset, the camera side determines that the focusing lens 211 is stopped.

"Step234"
The process of this flow is terminated.

  Next, a subroutine for target pulse width setting processing performed in step 220 will be described with reference to FIG.

"Step 235"
The lens CPU 219 determines whether (FOPC + FPC0) −FPC, which is the remaining drive amount to the target position, is equal to or less than the deceleration pulse. If it is equal to or less than the deceleration pulse, the process proceeds to step 236. Otherwise, the target pulse width setting process ends, and the process proceeds to step 221 of the main flow.

"Step 236"
The lens CPU 219 determines whether the high accuracy mode is selected or the high speed mode is selected by the lens control characteristic selection switch 226. When it is in the high accuracy mode, the process proceeds to step 238, and when it is determined that it is in the high speed mode, the process proceeds to step 237.

"Step 237"
Since the high speed mode is determined in step 236, the lens CPU 219 reads and sets the target speed pulse width data (T-SPD) from the high speed mode deceleration data table (deceleration control pattern).

"Step 238"
Since it is determined in step 236 that the mode is the high accuracy mode, the lens CPU 219 reads and sets the pulse width data (T-SPD) of the target speed from the deceleration data table (deceleration control pattern) in the high accuracy mode.

  Here, the deceleration data table in the high-speed mode and the high-accuracy mode is the same as that shown in FIG. 6 described in the first embodiment.

  That is, in the present embodiment, in the high speed mode, the deceleration rate up to a predetermined remaining drive amount (immediately before the stop) close to the stop position is made smaller than in the high accuracy mode, and then the speed is rapidly reduced. The deceleration data table is set so that it stops.

  On the other hand, in the high-accuracy mode, the deceleration data table is set so that the deceleration rate up to a predetermined remaining drive amount (immediately before the stop) close to the stop position is increased, and then the speed is gradually decreased to stop. Thus, high stop position accuracy can be obtained in the high accuracy mode.

  As described above, in this embodiment, since the speed control data (deceleration control pattern) at the time of deceleration control is changed according to the lens control characteristic selection, the stop position accuracy is highly accurate in the high accuracy mode. In the high-speed mode, the driving time of the focusing lens can be shortened by relaxing the stop position accuracy and speeding up the drive stop.

  In this embodiment, there are two lens control characteristic selections for changing the deceleration data at the time of deceleration control. However, there are a plurality of lens control characteristic selections for changing the deceleration data table, and the deceleration data is set more finely. Is also possible.

  In this embodiment, the case where the lens drive motor is accelerated and decelerated by voltage control using a DC motor as the lens drive motor has been described. However, by applying different two-phase frequency voltages to the piezoelectric element, vibration is excited in the vibrator and contact is made. A vibration type motor that relatively moves the body may be used. In this case, acceleration / deceleration is performed by controlling the frequency, voltage value, and phase difference of the frequency voltage.

  Although not described in detail, the control described in the second and third embodiments can be combined with the photographing lens 202 described in the present embodiment.

  In each of the embodiments described above, the film camera has been described. However, the present invention can also be applied to a digital camera.

1 is a block diagram of a camera that is a first embodiment of the present invention. FIG. The flowchart explaining the process of the said camera. The flowchart explaining the process of the said camera. The flowchart explaining the process of the said camera. The flowchart explaining the process of the said camera. The figure which shows the deceleration data table of the wide-angle side and telephoto side of the said camera. The block diagram of the camera which is 2nd Embodiment of this invention. The flowchart explaining the process of the camera which is 2nd Embodiment of this invention. The figure which shows the deceleration data table of the open side in the said 2nd Embodiment, and a narrowing-down side. The flowchart explaining the process of the camera of 3rd Embodiment of this invention. The figure which shows the deceleration pulse and deceleration data table of the wide-angle side and telephoto side in the said 3rd Embodiment. The block diagram of the camera system which is 4th Embodiment of this invention. The flowchart explaining the process by the side of the camera in the said 4th Embodiment. 10 is a flowchart for explaining processing on the photographing lens side in the fourth embodiment. 10 is a flowchart for explaining processing on the photographing lens side in the fourth embodiment. 10 is a flowchart for explaining processing on the photographing lens side in the fourth embodiment.

Explanation of symbols

1 Camera 2, 211 Focusing lens 3, 212 Zooming lens 4, 213 Aperture 7, 204 Metering unit 8, 206 Shutter 9, 207 Feeding charge system 10 Camera CPU
11, 205 Focus detection unit 12, 210 Power source 13, 220 Lens drive unit 14, 221 Lens drive motor 15, 222 Aperture drive unit 16, 223 Aperture drive motor 17, 224 Pulse generator 18, 226 Lens control characteristic selection switch 19, 225 AF selection switch 201 Camera 202 Shooting lens 208 Camera CPU
209, 218 Communication circuit 216 A / M switch 219 Lens CPU

Claims (26)

A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Control means for controlling the drive means so as to stop the focus adjustment lens at a target position by performing deceleration control according to a predetermined deceleration control pattern;
In a camera equipped with a lens control selection means for selecting either a high-precision mode with a high stop position accuracy with lens control characteristics and a high-speed mode with a fast driving time,
The camera, wherein the control means changes the deceleration control pattern according to a selection state by the control characteristic selection means.   When the control means decelerates the drive means toward the stop, the control means sets a deceleration control pattern that decelerates so that the deceleration rate immediately before the stop is larger in the high speed mode than in the high accuracy mode. The camera according to claim 1. A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Control means for controlling the drive means so as to stop the focus adjustment lens at a target position by performing deceleration control according to a predetermined deceleration control pattern;
In a camera provided with an AF selection means for selecting any one of AF modes including a servo AF mode that functions to always focus on a moving subject,
The camera characterized in that the control means changes the deceleration control pattern in accordance with a selection state by the AF selection means.   When the control means decelerates the drive means toward the stop, a deceleration control pattern is set to decelerate so that the deceleration rate immediately before the stop is larger in the servo AF mode than in other AF modes. The camera according to claim 3. A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Control means for controlling the drive means so as to stop the focus adjustment lens at a target position by performing deceleration control according to a predetermined deceleration control pattern;
In a camera provided with a shooting mode selection means for selecting any of shooting modes including a sports mode for setting a shutter speed short,
The camera, wherein the control means changes the deceleration control pattern according to a selection state by the photographing mode selection means.   The control means sets a deceleration control pattern for decelerating so that the deceleration rate immediately before the stop is greater in the sport mode than in the other shooting modes when the drive means is decelerated toward the stop. The camera according to claim 5. A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Position detecting means for detecting the position of the focusing lens;
Control means for controlling the driving means so as to stop the focus adjustment lens at the target position by performing deceleration control when the difference between the target position and the detection position by the position detection means becomes a predetermined value or less;
In a camera equipped with a lens control selection means for selecting either a high-precision mode with a high stop position accuracy with lens control characteristics and a high-speed mode with a fast driving time,
The camera, wherein the control means changes the predetermined value in accordance with a selection state by the control characteristic selection means.   The camera according to claim 7, wherein the control unit sets the predetermined value smaller in the high speed mode than in the high accuracy mode. A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Position detecting means for detecting the position of the focusing lens;
Control means for controlling the driving means so as to stop the focus adjustment lens at the target position by performing deceleration control when the difference between the target position and the detection position by the position detection means becomes a predetermined value or less;
In a camera provided with an AF selection means for selecting any one of AF modes including a servo AF mode that functions to always focus on a moving subject,
The camera characterized in that the control means changes the predetermined value in accordance with a selection state by the AF selection means.   10. The camera according to claim 9, wherein the control unit sets the predetermined value smaller in the servo AF mode than in other modes. A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Position detecting means for detecting the position of the focusing lens;
Control means for controlling the driving means so as to stop the focus adjustment lens at the target position by performing deceleration control when the difference between the target position and the detection position by the position detection means becomes a predetermined value or less;
In a camera provided with a shooting mode selection means for selecting any of shooting modes including a sports mode for setting a shutter speed short,
The camera according to claim 1, wherein the control unit changes the predetermined value in accordance with a selection state by the photographing mode selection unit.   The camera according to claim 11, wherein the control unit sets the predetermined value smaller in the sport mode than in other modes. A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Control means for controlling the drive means so as to stop the focus adjustment lens at a target position by performing deceleration control according to a predetermined deceleration control pattern;
In a lens apparatus having a lens control selection means for selecting one of a high accuracy mode in which the lens control characteristic has a high stop position accuracy and a high speed mode in which the driving time is fast.
The lens device according to claim 1, wherein the control unit changes the deceleration control pattern according to a selection state by the control characteristic selection unit.   When the control means decelerates the drive means toward the stop, the control means sets a deceleration control pattern that decelerates so that the deceleration rate immediately before the stop is larger in the high speed mode than in the high accuracy mode. The lens apparatus according to claim 13. A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Position detecting means for detecting the position of the focusing lens;
Control means for controlling the driving means so as to stop the focus adjustment lens at the target position by performing deceleration control when the difference between the target position and the detection position by the position detection means becomes a predetermined value or less;
In a lens apparatus having a lens control selection means for selecting one of a high accuracy mode in which the lens control characteristic has a high stop position accuracy and a high speed mode in which the driving time is fast.
The lens device according to claim 1, wherein the control unit changes the predetermined value in accordance with a selection state by the control characteristic selection unit.   16. The lens apparatus according to claim 15, wherein the control unit sets the predetermined value smaller in the high speed mode than in the high accuracy mode.   17. A camera system comprising: the lens device according to claim 13; and a camera in which the lens device can be attached and detached. A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Control means for controlling the drive means so as to stop the focus adjustment lens at a target position by performing deceleration control according to a predetermined deceleration control pattern;
In a lens apparatus that can be attached to and detached from a camera, including an AF selection means for selecting any of AF modes including a servo AF mode that functions to always focus on a moving subject.
The lens device according to claim 1, wherein the control means changes the deceleration control pattern in accordance with a selection state by the AF selection means.   When the control means decelerates the drive means toward the stop, a deceleration control pattern is set to decelerate so that the deceleration rate immediately before the stop is larger in the servo AF mode than in other AF modes. The lens device according to claim 18, wherein: A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Position detecting means for detecting the position of the focusing lens;
Control means for controlling the driving means so as to stop the focus adjustment lens at the target position by performing deceleration control when a difference between a target position and a detection position by the position detection means becomes a predetermined value or less. Prepared,
In a lens apparatus that can be attached to and detached from a camera, including an AF selection means for selecting any of AF modes including a servo AF mode that functions to always focus on a moving subject.
The lens device according to claim 1, wherein the control unit changes the predetermined value in accordance with a selection state by the AF selection unit.   21. The lens apparatus according to claim 20, wherein the control unit sets the predetermined value smaller in the servo AF mode than in other modes. A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Control means for controlling the drive means so as to stop the focus adjustment lens at a target position by performing deceleration control according to a predetermined deceleration control pattern;
In a lens apparatus that can be attached to and detached from a camera having a shooting mode selection means for selecting any of shooting modes including a sports mode that sets a shutter speed to be short,
The lens device according to claim 1, wherein the control unit changes the deceleration control pattern according to a selection state by the photographing mode selection unit.   The control means sets a deceleration control pattern for decelerating so that the deceleration rate immediately before the stop is greater in the sport mode than in the other shooting modes when the drive means is decelerated toward the stop. The lens device according to claim 22. A taking optical system including a focusing lens;
Driving means for driving the focusing lens;
Position detecting means for detecting the position of the focusing lens;
Control means for controlling the driving means so as to stop the focus adjustment lens at the target position by performing deceleration control when a difference between a target position and a detection position by the position detection means becomes a predetermined value or less. Prepared,
In a lens apparatus that can be attached to and detached from a camera having a shooting mode selection means for selecting any of shooting modes including a sports mode that sets a shutter speed to be short,
The lens device according to claim 1, wherein the control unit changes the predetermined value in accordance with a selection state by the photographing mode selection unit.   25. The lens apparatus according to claim 24, wherein the control unit sets the predetermined value smaller in the sport mode than in other shooting modes.   26. A camera system comprising: the lens device according to claim 18; and a camera in which the lens device can be attached and detached.