JP5806521B2 - Optical equipment - Google Patents

Description

  The present invention relates to an optical device in which a ring member is rotatably disposed in a lens barrel and the focus position can be switched according to a position set by the rotation of the ring member.

  It is known that, in an optical device having a zoom lens, by operating a zoom switch, a normal mode that freely moves the zoom to determine the shooting range and a step zoom mode that moves greatly to a predetermined position at once are switched. (See Patent Document 1).

JP 2009-169065 A

  As described above, it is known to switch between the normal mode and the step zoom according to the state of the zoom switch. However, auto focus that automatically adjusts the focus with the focus lens, manual focus that operates by operating the operation ring provided on the lens barrel, and range focus that adjusts the focus position to a predetermined distance by the operation ring. An optical device that can be easily switched has not been proposed. Further, it does not have a mechanism capable of presetting the focal length, and it is impossible to instantaneously photograph a composition predetermined by the user.

  The present invention has been made in view of such circumstances, and provides an optical apparatus in which a focus adjustment mode can be easily switched by operating a ring member provided in a lens barrel. Objective.

  In order to achieve the above object, an optical apparatus according to a first aspect of the present invention includes a focus adjustment lens provided in a lens barrel, rotatable with respect to the lens barrel, and a first position and a second position. A ring member slidably disposed on the camera body, a focus adjustment mode setting unit provided on the camera body side for setting a focus adjustment mode, and the focus when the ring member slides to the first position. When focus adjustment is performed in the focus adjustment mode set in the adjustment mode setting unit and the ring member slides to the second position, the focus adjustment mode according to the focus adjustment mode set in the focus adjustment mode setting unit And a control unit that stops focusing by the focus adjustment and focuses the focusing lens at a distance corresponding to the absolute position of the ring member.

  According to a second aspect of the present invention, there is provided an optical apparatus according to the first aspect, wherein the focus adjustment mode setting section can set a manual focus mode, the control section is set with the manual focus mode, and the ring When the member slides to the first position, the focus adjustment lens is focused according to the rotation of the ring member.

According to a third aspect of the present invention, there is provided the optical device according to the second aspect, wherein the control unit is configured so that the ring member is positioned at the first position, the manual focus mode is set, and the ring member is rotated. When the ring member slides to the second position during manual focusing of the focusing lens, the manual focusing is stopped and the absolute position of the ring member is handled. The focus adjustment lens is focused according to the distance.
According to a fourth aspect of the present invention, there is provided the optical device according to the second aspect, wherein the control unit is configured so that the ring member is positioned at the second position and the distance corresponding to the absolute position of the ring member. When the focus adjustment lens is in focus and the ring member slides to the first position, if the manual focus mode is set by the focus adjustment mode setting unit, the ring The focus adjustment lens is manually focused according to the rotation of the member.

  An optical apparatus according to a fifth invention includes a focus detection unit for performing focus detection in the first invention, and the focus adjustment mode setting unit can set an autofocus mode, and the control unit When the autofocus mode is set and the ring member slides to the first position, the focus adjustment is performed based on the detection by the focus detection unit regardless of the rotation of the ring member. Focus the lens.

An optical apparatus according to a sixth invention is the optical device according to the fifth invention, wherein the control unit is configured to detect the focus detection unit when the ring member is positioned at the first position and the autofocus mode is set. On the basis of this, when the focus adjustment lens is automatically focused, if the ring member slides to the second position, the focus adjustment based on automatic focus detection is stopped and the ring member is The focus adjustment lens is focused according to the distance corresponding to the specific position.
An optical apparatus according to a seventh invention is the optical device according to the fifth invention, wherein the control unit is configured to adjust the focus according to an absolute distance of the ring member when the ring member is located at the second position. When the ring member slides to the first position during the focusing of the lens, if the autofocus mode is set by the focus adjustment mode setting unit, detection by the focus detection unit Based on the above, the focusing lens is automatically focused.

An optical apparatus according to an eighth aspect of the present invention includes a focus adjustment lens for focusing, a ring member that is rotatably arranged with respect to the lens barrel, and a focusing operation by means other than the ring member. The first lens control unit that continuously switches the focus position according to the rotation speed at the time of the rotation operation of the member, and the distance according to the absolute position of the ring member from the focus operation other than the ring member , a second lens controller intends row focusing the focusing lens, a.
According to a ninth aspect of the present invention, in the eighth aspect, the ring member is slidable in a first position and a second position in the optical axis direction of the lens barrel. The control by the first lens control unit is executed when in the position, and the control by the second lens control unit is executed when in the second position .

  According to the present invention, it is possible to provide an optical apparatus in which a focus adjustment mode can be easily switched by operating a ring member provided in a lens barrel, and focus adjustment is performed without impairing system performance. It is possible to switch modes. In addition, since the determined focal position can be set, it is possible to shoot instantly when the user wants to shoot.

It is a block diagram which shows the internal structure of the camera concerning one Embodiment of this invention. 1 is a block diagram mainly showing an electrical configuration of a camera according to an embodiment of the present invention. In the camera concerning one embodiment of the present invention, it is a top view of a lens barrel in the state where MF ring is located in the 1st position. In the camera concerning one embodiment of the present invention, it is a top view of a lens barrel in the state where MF ring is located in the 2nd position. In the camera concerning one embodiment of the present invention, it is a perspective view explaining the state where MF ring and distance display ring engaged. It is a perspective view which shows the structure of the parameter | index position detection part in the camera concerning one Embodiment of this invention. 4 is a timing chart illustrating an example of synchronous communication between an interchangeable lens and a camera body in a camera according to an embodiment of the present invention. It is a figure which shows a mode that it sets to the range focus mode and it image | photographs in the camera concerning one Embodiment of this invention. It is a flowchart which shows the imaging | photography operation | movement of the camera concerning one Embodiment of this invention. It is a flowchart which shows MF ring operation detection and an operation | movement process of the camera concerning one Embodiment of this invention. It is a flowchart which shows the MF timer process of the camera concerning one Embodiment of this invention. FIG. 6 is a state transition diagram of an autofocus (AF) mode, a manual focus (MF) mode, and a range focus (RF) mode in a camera according to an embodiment of the present invention.

  Hereinafter, a preferred embodiment will be described using a camera to which the present invention is applied according to the drawings. FIG. 1 is a block diagram showing a configuration of a camera according to an embodiment of the present invention. This camera is a digital camera and includes a camera body 100 and an interchangeable lens 200. The interchangeable lens 200 is detachably attached via a bayonet mount or the like of the camera body. In the present embodiment, the camera body 100 and the interchangeable lens 200 are configured as separate bodies, but may of course be configured integrally.

  In the camera body 100, a camera control circuit 101, an image sensor 103, a focal plane shutter 104, a display monitor 105, a strobe 106, a release button 107, a battery 108, and the like are arranged. In the interchangeable lens 200, a lens control circuit 201, a focus adjustment lens 203, an MF ring 204, a diaphragm 205, and the like are disposed.

  The camera control circuit 101 includes an ASIC (Application Specific Integrated Circuit) including a main body CPU (Central Processing Unit) 121 (see FIG. 2) and the like, a peripheral circuit thereof, and the like. When the photographer operates the release button 107, the image pickup device 103, the focal plane shutter 104, and the like are controlled, and the light emission control of the strobe 106 is performed as necessary, and the photographing operation and the like are executed through the lens control circuit 201. In cooperation with a lens CPU 221 (see FIG. 2) in a lens control circuit 201, which will be described later, various sequences of the entire camera are comprehensively controlled. This control is executed according to a program stored in the flash ROM 122 (see FIG. 2). Details of the camera control circuit 101 will be described later with reference to FIG.

  The image sensor 103 is constituted by a solid-state image sensor such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor, and converts the subject image formed by the interchangeable lens 200 into an image signal. That is, according to the signal from the camera control circuit 101, the image signal is accumulated in the image sensor 103, and the image signal is read out. In this specification, a signal based on an output from the image sensor 103 may be referred to as image data in addition to an image signal.

  The focal plane shutter 104 performs an opening / closing operation in response to an instruction from the shutter control circuit 126 (see FIG. 2) in the camera control circuit 101 based on the full press of the release button 107, and opens / closes the subject luminous flux from the interchangeable lens 200. . This opening / closing time is a time corresponding to the shutter speed calculated by the camera control circuit 101.

  The display monitor 105 is configured by an LCD, an organic EL, or the like disposed on the back surface of the camera body. The display monitor 105 displays a live view display during still image shooting standby or movie shooting, a playback display of a recorded image according to an operation of a playback button, or a menu screen according to an operation of a menu button or the like. Etc., display setting information.

  The strobe 106 illuminates the subject with auxiliary light according to an instruction from the strobe control circuit 125 (see FIG. 2) in the camera control circuit 101 when the surroundings are dark when the release button 107 is operated. This light emission is performed in synchronization with the exposure operation of the focal plane shutter 104 using charges stored in a light emitting capacitor (not shown).

  The release button 107 includes a first release switch 132 (see FIG. 2) that is turned on when half-pressed, and a second release switch 133 (see FIG. 2) that is turned on when the button is further pressed halfway down and fully pressed. When the first release switch 132 is turned on, the camera control circuit 101 executes a shooting preparation sequence such as an AE (Auto Exposure) operation and an AF (Auto Focus) operation. When the second release switch 133 is turned on, the focal plane shutter 104 and the like are controlled to acquire image data based on the subject image from the image sensor 103 and execute a series of shooting sequences for recording the image data on a recording medium. And take a picture.

  The battery 108 supplies power to each member and each circuit in the camera body 100 and the interchangeable lens 200.

  The lens control circuit 201 in the interchangeable lens 200 includes an ASIC including a lens CPU and the peripheral circuits thereof. In response to an instruction from the camera control circuit 101 or an operation of the MF ring 204 by the photographer, drive control of the focus adjustment lens 203 and the diaphragm 205 is performed. Also, in response to a request from the camera control 101, various lens information such as a focal length, a set distance, and an aperture value are transmitted. This control is executed according to a program stored in a flash ROM (not shown). Details of the lens control circuit 201 will be described later with reference to FIG.

  The focus adjustment lens 203 moves in the optical axis direction based on an instruction from the lens control circuit 201 and adjusts the focus state of the interchangeable lens 200. In the present embodiment, a single focus lens will be described. Of course, a zoom lens having a variable focal length may be used.

  The MF ring 204 is disposed on the outer periphery of the interchangeable lens 200, can be rotated around the optical axis center of the interchangeable lens 200, and between the first position and the second position along the optical axis direction. Slide operation is possible. A manual focus operation is possible by rotating the MF ring 204 at the first position where the MF ring 204 is slid to the front side (subject side) of the interchangeable lens 200. Further, the range focus operation can be performed by rotating the MF ring 204 at the second position where the MF ring 204 is slid to the rear side (imaging side) of the interchangeable lens 200. The first position and the second position of the MF ring 204 will be described later with reference to FIGS.

  The diaphragm 205 changes the aperture area based on an instruction from the lens control circuit 201 and adjusts the amount of the subject luminous flux that passes through the interchangeable lens 200.

  Next, details of the camera control circuit 101 and the lens control circuit 201 will be described with reference to FIG. In the camera control circuit 101, a main body CPU 121 is provided. The main body CPU 121 includes a flash ROM (Read Only Memory) 122, a RAM (Random Access Memory) 123, an image sensor control circuit 124, a strobe control circuit 125, a shutter. A control circuit 126, an image processing circuit 127, a display circuit 128, an operation switch detection circuit 129, a power supply circuit 130, and a communication circuit 131 are connected. Various signals are input and output between these various circuits and the main body CPU 121.

  The main body CPU 121 controls the entire camera in accordance with a program stored in the flash ROM 122. Further, communication with the lens CPU 221 is possible via the camera body communication circuit 131 and the lens communication circuit 229, and a control command is output and lens information such as the lens position of the focus adjustment lens 203 is acquired.

  The flash ROM 122 is an electrically rewritable nonvolatile memory, stores a program executed by the main body CPU 121 as described above, and also stores various adjustment values and the like. A memory other than the flash ROM may be adopted as long as it is a non-volatile memory. The RAM 123 is an electrically rewritable volatile memory such as DRAM (Dynamic Random Access Memory) or SDRAM (Synchronous DRAM), and temporarily stores various information to be processed in the main body 121.

  The image sensor control circuit 124 performs an image capturing operation for converting a subject image into an image signal to the image sensor 103 when performing an operation of a process that requires image data such as live view display, AE, AF, and exposure at the time of shooting. Let it run. As the imaging operation, charge accumulation control in the imaging element 103, reading of an image signal, and the like are performed.

  The strobe control circuit 125 is connected to the strobe 106 and controls charging and light emission of the strobe 106. For example, the strobe control circuit 125 controls the light emission amount so as to achieve proper exposure based on the lens position information of the focus adjustment lens 203 acquired from the lens CPU 221. The shutter control circuit 126 is connected to the focal plane shutter 104 and performs opening / closing control of the focal plane shutter 104 based on a shutter speed signal from the main body CPU 121.

  The image processing circuit 127 performs image processing such as A / D conversion and filter processing on the image signal output from the image sensor 103. In addition, when performing image processing, image processing for live view display is performed, and live view display is performed on the display monitor 105 based on the processed image signal. Further, image processing is performed on the captured image for recording, and the processed image data is recorded on a recording medium (not shown). Further, high-frequency components are extracted from the image signal in the focus detection area by high-pass filtering to calculate an AF evaluation value. Therefore, the image processing circuit 127 functions as a focus detection unit for performing focus detection. In the present embodiment, a known contrast AF is employed for focus detection, the focus adjustment lens 203 is moved, and the position where the AF evaluation value reaches a peak is set as the focus position. The focus detection method is not limited to contrast AF, and other methods such as phase difference AF may be employed.

  The display circuit 128 is connected to the display monitor 105, and performs live view display, playback display of a captured image recorded on a recording medium, and display of various shooting information such as a menu screen.

  The operation switch detection circuit 129 is connected to the first release switch 132, the second release switch 133, and other detection switches (not shown) linked to the release button 107, detects the operation state of these switches, and detects the detection result. Output to the main body CPU 121. Other detection switches include a power switch linked to a power button for turning on / off the power, a shooting mode switch for switching a camera shooting mode, a menu switch linked to a menu button for displaying a menu screen, and a recording medium. There are a reproduction switch linked to a reproduction button for reproducing and displaying a photographed image, a mount switch for detecting the mounting state of the interchangeable lens 200, a moving image switch linked to a moving image button for instructing start and end of moving image shooting, and the like.

  On the menu screen, various shooting information such as a focus adjustment mode is set. In this embodiment, the focus adjustment mode set on the menu screen is an autofocus mode (AF mode) in which the focus adjustment lens 203 is automatically focused, and a manual focus mode in which the focus is manually adjusted. There are two types (MF mode). Of course, the focus adjustment mode in the camera body 100 may be set by other methods such as a dedicated button or the like other than the menu screen as in the present embodiment. An operation switch detection circuit 129, a main body CPU 121, and the like are provided on the camera main body side, and function as a focus adjustment mode setting unit that sets a focus adjustment mode.

  The power supply circuit 130 is connected to the battery 108, smoothes and boosts the power supply voltage, and supplies power to each circuit and each member in the camera body 100 and the interchangeable lens 200.

  The camera body communication circuit 131 has a plurality of communication terminals such as a synchronization signal terminal and a data terminal provided in a mount part outside the camera body 200. The main body CPU 121 and the lens CPU 221 communicate via the lens communication circuit 229. Communication between the camera main body communication circuit 131 and the lens communication circuit 229 is performed by asynchronous communication at the beginning of mounting of the main body and the interchangeable lens, but after the interchangeable lens information is acquired on the camera main body side, the mounted interchangeable lens 200 performs synchronous communication. If possible, communicate by synchronous communication.

  In the lens control circuit 201, a lens CPU 221 is provided. The lens CPU 221 includes a lens driving circuit 222, a lens position detection circuit 223, an MF ring position detection circuit 224, an MF position detection circuit 225, and an index position detection circuit 226. A diaphragm driving circuit 227, a RAM 228, and a communication circuit 229 are connected.

  The lens CPU 221 includes a program and various adjustment values stored in a flash ROM (not shown) provided in the interchangeable lens, a lens position detection circuit 223, an MF ring position detection circuit 224, an MF position detection circuit 225, and an index position detection. The interchangeable lens 200 is controlled in accordance with an output signal from the circuit 226 and a control command from the main body CPU 121. Specifically, various driving controls such as lens driving of the focus adjustment lens 203 and diaphragm driving of the diaphragm 205 are performed. In addition, communication with the main body CPU 121 is performed via the camera main body communication circuit 131 and the lens communication circuit 229, reception of an operation command from the main body CPU 121, lens operation state of the interchangeable lens 200, and information indicating a lens state such as optical data. Send.

  The lens driving circuit 222 includes an actuator such as a stepping motor, a motor driver, and the like, and performs drive control of the focus adjustment lens 203 in the optical axis direction. When focus adjustment is performed in a range focus mode (RF mode) described later, braking (acceleration / deceleration) control of the focus adjustment lens 203 is performed using a synchronization signal for synchronization communication from the camera body 100 as a timing signal. Do. In addition, drive control by so-called wobbling operation in which the focus adjustment lens 203 is finely inverted is also possible.

  The lens position detection circuit 223 detects the position of the focus adjustment lens 203. The lens position detection circuit 223 includes a photo interrupter (PI) circuit that converts the rotation amount of a driving motor such as a stepping motor included in the lens driving circuit 222 into the number of pulses. The position detection result is represented by the number of pulses from the reference position where the absolute value of the focus adjustment lens 203 is infinite.

  The MF ring position detection circuit 224 detects the slide position of the interchangeable lens 200 of the MF ring 204 in the optical axis direction. That is, the MF ring 204 slides to the front side of the interchangeable lens 204, slides to the manual focus operation position (MF position, first position), and the rear side of the interchangeable lens 204, and the range focus operation position (RF position, It can be moved to two positions (second position). The MF ring position detection circuit 224 detects whether the MF ring 204 is in the first position or the second position. This position detection mechanism will be described later with reference to FIG.

  The MF position detection circuit 225 includes a PI circuit, and detects a relative position change amount in the rotation direction of the MF ring 204 with respect to the optical axis center of the interchangeable lens 200. That is, when the position of the MF ring 204 detected by the MF ring position detection circuit 224 is at the manual focus operation position (MF position, first position), the MF ring position is determined based on the pulse signal output from the PI circuit. The rotation direction, rotation amount, rotation speed, etc. of 204 can be detected. As a detection timer used for detecting the rotation of the MF ring 204, a normal built-in timer in the lens CPU 221 is used. The configuration of the photo interrupter of the PI circuit will be described later with reference to FIG.

  The index detection circuit 226 includes a linear encoder, an A / D conversion circuit, and the like, and detects a distance index corresponding to the drive target position of the focus adjustment lens 203. That is, when the position of the MF ring 204 detected by the MF ring position detection circuit 224 is in the range focus position (RF position, second position), the MF ring 204 is detected based on the A / D conversion result of the encoder value. The distance index position corresponding to the drive target position set at the rotational position at the center of the optical axis of the interchangeable lens 200 is detected. That is, the index detection circuit 226 detects an absolute distance set by the MF ring 204. When the MF ring 204 is slid to the RF position (second position), a mode for controlling the focus adjustment lens 203 so as to correspond to a distance determined by an absolute position in the rotation direction of the MF ring 204 is set. This is called a range focus mode (RF mode). The timing signal of the detection timer used when reading the encoder value uses a lens communication synchronization signal for performing synchronous communication between the camera body 100 and the interchangeable lens 200. The configuration of an example of the detection mechanism of the index detection circuit 226 using a linear encoder will be described later with reference to FIG.

  The aperture driving circuit 227 includes an actuator such as a stepping motor, a motor driver, and the like, and controls the aperture operation of the aperture 205 in accordance with the aperture value from the lens CPU 221.

  The RAM 228 is a volatile memory for temporarily storing various information used in the lens CPU 221.

  The lens communication circuit 229 has a plurality of communication connection terminals such as a synchronization signal terminal and a data terminal provided on the mount part outside the interchangeable lens 200, and engages with the communication connection terminal of the camera body communication circuit 131. Communicate with the camera body. Through this lens communication circuit 229, the control command of the focus adjustment lens 203 and the diaphragm 205 from the main body CPU 221 is received, and information on the lens state such as optical data, lens position information, and operation state is transmitted to the main body CPU 221. .

  The camera control circuit 101 and the lens control circuit 201 function as a control unit by jointly controlling the camera. That is, when the MF ring (ring member) 204 slides to the first position, the control unit performs focus adjustment in the focus adjustment mode set on the camera body side, and the MF ring 204 is in the second position. , The focus adjustment by the focus adjustment mode set on the camera body side is stopped, and the focus adjustment lens 203 is focused at a distance corresponding to the absolute position set by the MF ring 204. Do.

  Further, the camera control circuit 101 and the lens control circuit 201 jointly control the camera, so that the focus position is continuously changed according to the rotation speed at the time of the rotation operation of the MF ring 204 from the focus operation other than the MF ring 204. It functions as a first lens control unit that switches between the first lens control unit and a second lens control unit that switches the focus position corresponding to the operation position according to the position of the MF ring 204 from the focusing operation other than the MF ring 204. Here, the control in the first lens control unit specifically corresponds to the control for switching from the AF mode to the MF mode, but the focusing operation other than in the MF ring 204 is not limited to the AF mode, but on the main body side. The manual focus operation may be performed (the same applies to a third lens control unit described later). The control in the second lens control unit specifically corresponds to the control in the RF mode.

  Further, the camera control circuit 101 and the lens control circuit 201 jointly control the camera to switch the focus position according to the focusing operation other than the MF ring 204 or the ring operation of the MF ring 204. Regardless of the focus operation other than the MF ring 204, the fourth lens control unit that switches the focus position corresponding to the operation position according to the position of the ring operation of the MF ring 204 is achieved. Here, the control by the third lens control unit specifically corresponds to the control by the AF mode or the MF mode, and the control by the fourth lens control unit specifically corresponds to the control by the RF mode.

  Next, the sliding operation to the 1st position and 2nd position of MF ring 204 is demonstrated using FIG. 3 and FIG. FIG. 3 shows a case where the MF ring 204 is in the first position, and FIG. 4 shows a case where the MF ring 204 is in the second position.

  A bayonet portion 21 is provided on the rear side of the interchangeable lens 200. The bayonet part 21 can be attached to the camera body 100 by engaging with a bayonet part on the camera body 100 side (not shown). The base 22 is configured integrally with the bayonet portion 21, and is fixed to the camera body 100 when the bayonet portion 21 is attached to the camera body 100.

  The MF ring 204 has a substantially cylindrical shape that is disposed around the outer periphery of the lens barrel of the interchangeable lens 200 so as to be rotatable around the optical axis O and to be movable back and forth in the optical axis O direction. The MF ring 204 is exposed on the outer periphery of the lens barrel, and is arranged so that a photographer's finger can be caught. Of course, only a part of the MF ring 204 may be exposed on the outer periphery.

  The position of the index display frame 25 is fixed with respect to the base portion 22 and is a part of the exterior member of the lens barrel. The index display frame 25 is arranged on the front side of the MF ring 204 even when the MF ring 204 is in the first position (MF position). In the index display frame 25, an index 25a and a subject depth index 25b are displayed. An index 25a indicates a reference index of a distance scale 24a provided on the distance display ring 24 described later, and a subject depth index 25b is an index indicating the subject depth corresponding to the aperture value of the aperture 205 with respect to the distance scale 24a. .

  In the state shown in FIG. 3, when the MF ring 204 is slid to the second position on the rear side (imaging side, camera body side) along the optical axis O, as shown in FIG. Exposed. The distance display ring 24 is a substantially cylindrical member disposed inside the MF ring 204, and does not move integrally with the MF ring 204 when the MF ring 204 is in the first position. However, when the MF ring 204 moves to the second position, the distance display ring 24 can rotate around the optical axis O integrally with the MF ring 204.

  On the outer peripheral surface of the distance display ring 24, as shown in FIG. 4, a distance scale 24a representing a distance (focus distance) at which the focal length lens 203 is focused is displayed. In the distance scale 24a, numerical values indicating the distance from the shortest focusing distance to infinity are arranged along the circumferential direction. As the distance display ring 24 rotates around the optical axis O with respect to the index display frame 25, the numerical value of the distance scale 24a indicated by the index 25a changes.

  The distance display ring 24 has a limited rotation range around the optical axis O, and can be rotated only within the distance range indicated by the index 25a. Therefore, the distance scale 24a displays the distance from the shortest focusing distance to infinity as a numerical value with respect to the index 25a.

  Thus, in this embodiment, when the MF ring 204 is located at the first position (MF position), the distance scale 24a of the distance display ring 24 is a lens mirror as shown in FIG. It becomes invisible from the outside of the tube. On the other hand, when the MF ring 204 is located at the second position (RF position), the distance scale 24a is visible from the outside of the lens barrel as shown in FIG.

  As described above, the distance display ring 24 is configured to rotate around the optical axis O together with the MF ring 204 only when the MF ring 204 is in the second position, and the MF ring 204 is in the first position. When in the (MF position), the MF ring 204 can be rotated independently of the distance display ring 24.

  That is, as shown in FIG. 5, the engagement pin 24b is provided on the inner peripheral portion of the distance display ring 24 so as to protrude radially inward. In addition, a plurality of engaging portions 204 a are arranged on the inner cylindrical portion 204 b of the MF ring 204. When the MF ring 204 is in the first position (MF position), the engagement pin 24b is on the rear side of the engagement portion 204a of the MF ring 204, and the MF ring 204 rotates around the optical axis O. Even if it does not interfere with the engaging portion 204a. Further, when the MF ring 204 is in the second position (RF position), the engagement pin 24b is disposed at a position overlapping the engagement portion 204a. Therefore, when the MF ring 204 is in the second position, the distance display ring 24 rotates around the optical axis O together with the MF ring 204, while when the MF ring 204 is in the first position, Even if the MF ring 204 rotates about the optical axis O, the distance display ring 24 does not rotate but remains stopped.

  Next, the configuration of the detection mechanism of the MF ring position detection circuit 224 and the MF position detection circuit 225 will be described with reference to FIG. The MF ring position detection circuit 224 includes a photo interrupter unit 224a. The photo interrupter unit 224a is fixed to the base unit 22 or a member integrally formed with the base unit 22, and when the MF ring 204 is located at the second position, at least the MF ring 204 When a part of the MF ring 204 is located within the detection range and the MF ring 204 is located at the first position, the MF ring 204 is provided outside the detection range.

  In the present embodiment, the position of the MF ring 204 is detected by the photo interrupter unit 224a, but other detection sensors are employed as long as the position of the MF ring 204 can be detected without being limited to the photo interrupter. It doesn't matter. For example, a magnetic sensor or a switch may be used.

  The MF position detection circuit 225 has a pair of photo interrupters 225a. In addition, a plurality of slit holes 204 c provided at predetermined intervals are provided in the circumferential direction of the inner cylinder 204 b that rotates integrally with the MF ring 204. The pair of photo interrupters 225a is provided within the detection range of the slit hole 204c when the MF ring 204 is in the first position (MF position). Then, based on the output signals from the pair of photo interrupters 225a, a rotation state such as a rotation direction, a rotation amount, a rotation speed, and the like of the MF ring 204 around the optical axis O is detected.

  The detection sensor of the MF position detection circuit 225 only needs to be able to detect the rotation of the MF ring 204 when the MF ring 204 is at the first position (MF position). For example, a magnetic rotary encoder— Etc.

  Next, the detection mechanism of the index position detection circuit 226 will be described with reference to FIG. The index position detection circuit 226 has an encoder unit 226a. The encoder unit 226 a detects an absolute rotation position around the optical axis O with respect to the base unit 22 of the distance display ring 24. The encoder unit 226a includes a code pattern 226b having a predetermined number of bits made of a conductor and a contact part 226c made of a conductor that slides on the code pattern 226b.

  The code pattern 226 b is disposed on the outer periphery of the distance display ring 24, and the contact portion 226 c is disposed on a fixed frame integrally formed with the base unit 22. When the distance display ring 24 rotates around the optical axis O, the position of the code pattern 226b with which the contact portion 226c contacts changes according to the rotation position. The index position detection circuit 226 detects a change in the contact state between the code pattern 226b and the contact portion 226c, and detects an absolute rotation position around the optical axis O of the MF ring 204.

  The index position detection circuit 226 may of course employ a configuration other than the contact type encoder as long as it can detect the absolute rotation position around the optical axis O with respect to the base unit 22. . For example, it may be an optical or magnetic rotary encoder for detecting an absolute position, or a potentiometer whose resistance value changes according to the rotational position of the distance display ring 24 around the optical axis O. In this embodiment, in order to detect the absolute position at high speed, the lens communication synchronization signal at the time of synchronous communication between the camera body 100 and the interchangeable lens 200 is used as a timing signal for the detection timer. To do.

  Next, an example of synchronous communication performed between the camera body 100 and the interchangeable lens 200 will be described with reference to FIG. In FIG. 7, the horizontal axis represents the flow of time, and the vertical axis represents the processing contents and timing. In the camera body process, in process B1, a live view image is displayed and an AF evaluation value is calculated based on the image data acquired in the previous frame. In the process B2, AF calculation, various setting changes, and the like are performed based on the lens state data acquired by the lens state communication.

  The vertical synchronization signal is a signal output corresponding to each frame. In imaging / reading, a subject image is picked up by the image pickup device 103, and the picked-up image data is read out. In FIG. 7, the imaging / reading has a rhombus shape. In this embodiment, a rolling shutter is used when a live view image is acquired, and imaging and reading are sequentially performed for each pixel line. To do.

  In the communication BL in the lens communication, a lens state data request command is transmitted from the camera body 100 to the interchangeable lens 200, and this command requests that data indicating the lens state of the interchangeable lens 200 be transmitted to the camera body 100. In the communication LB, the interchangeable lens 200 transmits data indicating the lens state to the camera body 100 in response to the lens state data request command.

  The lens communication synchronization signal is generated in response to the vertical synchronization signal in the camera body 100, and this lens communication synchronization signal is output from the synchronization signal terminal of the camera body communication circuit 131 to the interchangeable lens 200. The state of the lens position acquisition signal changes at a predetermined timing, for example, in the example shown in FIG.

  Also, the process L1 in the interchangeable lens 200 is to acquire the position information of the focus adjustment lens 203 at the state change timing of the lens position acquisition signal and to detect the operation state of the MF ring 204 at the reception timing of the lens communication synchronization signal. This is the process to be performed. The process L2 is a process of transmitting lens state data such as the position information of the focus adjustment lens 203 and the operation state of the MF ring 204 in accordance with the lens state data request command received from the camera body 100.

  As shown in the timing chart of FIG. 7, in the synchronous communication in this embodiment, the process B1 is executed in the camera body 100 in synchronization with the vertical synchronization signal, and the lens communication synchronization signal is synchronized with the vertical synchronization signal. This is transmitted to the interchangeable lens 200.

  When processing B1 is processed in the camera body 100, a lens state data request command is transmitted to the interchangeable lens 200 by communication BL. When the interchangeable lens 200 receives the lens state data request command, the interchangeable lens 200 detects the lens state and transmits the lens state data by communication LB. When receiving the lens state data, the camera body 100 executes the process B2.

  In the interchangeable lens 200, the process L1 for acquiring the lens position is executed in synchronization with the lens position acquisition signal. This lens position acquisition signal is generated at a predetermined timing, as described above, in the example of FIG. 7, when ½ of the charge accumulation time at the screen center of the image sensor 103 has elapsed. The interchangeable lens 200 acquires the position information of the focus adjustment lens 203 by the lens position detection circuit 223 at the timing of the state change of the lens position acquisition signal. These synchronous communications are executed in synchronization with the lens communication synchronization signal as a whole.

  Next, the focus adjustment mode in this embodiment will be described. In this embodiment, three types of focus adjustment modes are prepared: an autofocus mode (AF mode), a manual focus mode (MF mode), and a range focus mode (RF mode). In the AF mode, the focus adjustment lens 203 is automatically focused by a hill climbing method using contrast AF based on image data from the image sensor 103. In the MF mode, when the MF ring 204 is at the first position (MF position), the MF ring 204 is manually rotated, and the focus adjustment lens 203 is moved according to the rotation state at this time to focus. Do. As described above, the AF mode and the MF mode are set, for example, on a menu screen in the camera body 100.

  On the other hand, in the RF mode, when the MF ring 204 is in the second position, the MF ring 204 is rotated, and the distance setting 24a of the distance display ring 24 is set to the index 25a to set the distance. Focus on this set distance. If the power is turned off after the distance is set in advance in the RF mode, and then the power is turned on in the RF mode, the focus can be adjusted to the preset distance. For example, as shown in FIG. 8 (a), when the photographer 301 is taking a walk in the city or the like, if the distance is set in advance in the RF mode, the subject as shown in FIG. 8 (b) is obtained. Even if 303 appears suddenly, it is possible to quickly take a picture.

  Further, after the distance is set in the RF mode, even when the MF ring 204 is switched to the MF mode or AF mode by sliding the MF ring 204 to the first position (MF position), the MF ring 204 is slid to the second position. If you do, the camera will focus immediately on the set distance.

  Next, the photographing operation in the present embodiment will be described using the flowcharts shown in FIGS. This flowchart is mainly executed by the main body CPU 121 in accordance with a program stored in the flash ROM 122 in the camera main body 100. However, when the RF mode is set in part during the flow of the MF ring operation detection / operation processing, The lens CPU 221 mainly executes in accordance with a program stored in a flash ROM in the interchangeable lens 200.

  When the operation switch detection circuit 129 detects that the power button has been operated, the operation shown in the flowchart of FIG. 9 starts. First, it is determined whether or not the interchangeable lens 200 is attached (S1). This determination is performed based on the detection result of the operation switch detection circuit 129 detecting the state of the mount switch or the like. If the result of this determination is that the interchangeable lens 200 has not been mounted, the camera enters a standby state waiting for the replacement lens 200 to be mounted. When the photographer performs an operation of changing the photographing parameter, a reproduction operation of a photographed image photographed in the past, setting of a focus adjustment mode, or the like during standby, an instructed operation is executed.

  If the result of determination in step S <b> 1 is that the interchangeable lens 200 is attached to the camera body 100, lens communication is next performed (S <b> 3). Here, asynchronous communication is performed with the lens CPU 221 via the camera body communication circuit 131 and the lens communication circuit 229. Through this asynchronous communication, operating parameters of the focus adjustment lens 203 and the like, lens data such as optical data such as chromatic aberration data, information on whether synchronous communication is possible, and the like are acquired and stored in the RAM 123.

  Once lens communication is performed, synchronous communication is then started (S5). Here, as described with reference to FIG. 7, a lens communication synchronization signal is transmitted from the camera body 100 to the interchangeable lens 200, and communication is performed in synchronization with this signal. Lens state data such as the operation state of the focus adjustment lens 203 and the operation state of the MF ring 204 is acquired for each synchronization period, and a control operation corresponding to the lens state is executed. Therefore, each time a lens communication synchronization signal is output, the camera body determines whether the data relating to the lens position of the focus adjustment lens 203, the MF ring 204 is in the first position or the second position, Information such as an aperture value can be acquired, and a control operation corresponding to this information is executed. Also, the camera body 100 can transmit a control command relating to the driving direction and driving amount of the focus adjustment lens 203 for performing AF control, and the aperture amount of the diaphragm 205. If an interchangeable lens that cannot be synchronized is mounted by the lens communication performed in step S3, the synchronization communication is not performed.

  When synchronous communication is started, next, live view display is started (S7). The main body CPU 121 operates the image sensor 103 from the image sensor control circuit 124 every synchronization period to acquire image data, and the image processing circuit 127 performs image processing for live view display. Using the image data processed for live view display, the display circuit 128 starts live view display on the display monitor 105.

  When live view display is started, it is next determined whether or not the interchangeable lens 100 has been removed (S9). Here, it is determined whether or not the interchangeable lens 100 has been removed based on at least one of the communication state of the synchronous communication started in step S5 and the state of the mount switch as in step S1. If the result of this determination is that the interchangeable lens 100 has been removed, processing returns to step S1.

  If the result of determination in step S9 is that the interchangeable lens 100 has not been removed and is mounted, it is next determined whether or not the power is off (S11). Here, the operation switch detection circuit 129 detects the operation state of the power button and makes a determination based on the detection result. If the result of this determination is that the power is off, end processing is performed (S13). Here, processing such as various data saving processing, reset operation, power supply system disconnection processing, and the like is performed. When the termination process is performed, this flow is terminated.

  If the result of determination in step S <b> 11 is that the power has not been turned off, MF ring operation detection / operation processing is performed (S <b> 15). Here, operation control and setting processing of the focus adjustment lens 203 are performed according to the operation state of the MF ring 204. That is, when the MF ring 204 is in the second position where it slides to the rear side (imaging side) of the interchangeable lens 200, is the camera body 100 set to AF mode or MF mode? Regardless, the RF mode is executed. On the other hand, when the MF ring 204 is in the first position sliding toward the front side (subject side) of the interchangeable lens 200, control according to the AF mode or MF mode set in the camera body 100 is performed. Detailed processing of the MF ring operation detection / motion processing will be described later with reference to FIG.

  Once the MF ring operation detection / operation process has been carried out, it is next determined whether or not the moving image switch is on (S17). Here, the operation switch detection circuit 129 detects the operation state of the moving image switch and makes a determination based on the detection result.

  If the result of determination in step S17 is that the moving image switch is off, that is, in the still image shooting mode, it is determined whether or not the 1st release switch is on (S19). The photographer presses the release button halfway as a preparation stage before shooting. Here, the operation switch detection circuit 129 detects the operation state of the first release switch and makes a determination based on the detection result. If the result of this determination is that the first release switch is off, processing returns to step S9.

  If the result of determination in step S19 is that the 1st release switch is on, still image photometry / AF is carried out (S21). Here, operations necessary for photographing such as photometry for still image photographing, exposure calculation, and AF are executed. In the photometry and exposure calculation, subject luminance is detected based on image data from the image sensor 103, and exposure control values such as a shutter speed and an aperture value for appropriate exposure are calculated based on the detected subject luminance. In addition, AF for still image shooting performs an AF operation by a so-called hill-climbing method so that a high-frequency component (AF evaluation value) extracted from image data becomes the largest. An automatic focus adjustment operation using phase difference AF may be performed.

  If still image photometry / AF is performed, it is next determined whether or not the 1st release switch is off (S23). In some cases, the photographer presses the release button halfway in preparation for shooting and then releases the release button to stop the shooting preparation operation. Here, the operation switch detection circuit 129 detects the operation state of the first release switch and makes a determination based on the detection result. If the result of this determination is that the first release switch is off, processing proceeds to step S41 described below.

  On the other hand, if the result of determination in step S23 is that the 1st release switch is not off, that is, it is on, it is next determined whether or not the 2nd release switch is on (S25). The photographer observes the live view display. When the composition and the shutter timing are determined, the photographer fully presses the release button and instructs the execution of photographing. Here, the operation switch detection circuit 129 detects the operation state of the 2nd release switch and makes a determination based on the detection result. If the result of this determination is that the 2nd release switch is off, processing returns to step S23.

  If the result of determination in step S <b> 25 is that the 2nd release switch is on, the flow proceeds to shooting operation. First, imaging is performed (S27). Here, based on the exposure calculation result calculated in step S21, the main body CPU 121 communicates with the lens CPU 221 to instruct the aperture operation of the aperture 205. After the aperture operation is completed, the image sensor control circuit 124 and the shutter control circuit 126 perform imaging. The element 103 and the focal plane shutter 104 are controlled to perform an imaging operation. After completion of the imaging operation, the image signal read from the imaging element 103 is processed by the image processing circuit 127 to acquire image data.

  Once imaging has been performed, image data is then stored (S29). Here, the main body CPU 121 stores the image data acquired in step S27 in the RAM 123 or an external storage medium such as a compact flash (registered trademark). Further, based on the acquired image data, the captured image is displayed on the display monitor via the display circuit 127 for a predetermined time.

  If the result of determination in step S <b> 17 is that the movie switch is on, movie shooting mode is entered. First, moving image shooting is started (S31). The main body CPU 121 causes the image sensor control circuit 124 to operate the image sensor 103 for each synchronization period to start moving image shooting. The image signal output from the image sensor 103 is subjected to image processing for moving images by the image processing circuit 127, and recording of the moving image image data in an external storage medium such as the RAM 123 or Compact Flash (registered trademark) is started.

  When movie shooting is started, MF ring operation detection / operation processing is subsequently performed (S33). Here, as in step S15, operation control and setting processing of the focus adjustment lens 203 are performed in accordance with the operation state of the MF ring 204.

  Once MF ring operation detection / operation processing has been performed, moving image photometry / AF is then performed (S35). As the AE for moving image shooting, the aperture 205 is driven by the aperture drive circuit 227 with finer driving steps than those for still image shooting, and control is performed so that the change in the amount of subject light incident on the image sensor 103 becomes smooth. In the AF mode, the AF for moving image shooting performs a hill-climbing AF operation, and performs a so-called wobbling operation that causes the focus adjustment lens 203 to be minutely driven near the in-focus state as necessary.

  Once the moving image metering / AF operation is performed, it is next determined whether or not the moving image switch is off (S37). When the photographer finishes moving image shooting, the user releases the moving image button. Here, the operation switch detection circuit 129 detects the operation state of the moving image switch and makes a determination based on the detection result. If the result of this determination is that the movie switch is on, processing returns to step S33 and movie shooting continues.

  If the result of determination in step S37 is that the movie switch is off, movie shooting end processing is next carried out (S39). Here, the main body CPU 121 stops the operation of the image sensor 103 by the image sensor control circuit 124 and ends the moving image shooting.

  When image data is stored in step S29, or when moving image shooting is ended in step S39, or if the result of determination in step S23 is that the 1st release switch is OFF, display initialization is then performed. Perform (S41). Here, the main body CPU 121 clears the captured image display, the moving image capturing parameter display, and the like by the display circuit 127 and returns the display on the display monitor 105 to the live view display. When the display is initialized, the process returns to step S9.

  Next, the MF ring operation detection / operation process in steps S15 and S33 will be described with reference to the flowchart shown in FIG. The operation of the flow of the MF ring detection / operation process is executed by the lens CPU 221 under the control of the main body CPU 121, but the lens CPU 221 is mainly executed when executing the RF mode. When the flow of the MF ring operation detection / operation process is entered, it is first determined whether or not the MF ring 204 is at the RF position (S51). Here, the MF ring position detection circuit 224 detects the position of the MF ring 204, and determines whether or not it is at the RF position (range focus position, second position) based on the detection result.

  If the result of determination in step S51 is that the MF ring 204 is at the RF position, then a distance index setting flag is set at the timing of L1 (S53). The timing of L1 is the timing at which the lens communication synchronization signal is transmitted from the camera body 100 to the interchangeable lens 200 as described with reference to FIG. The distance index setting flag is a flag indicating that the MF ring 204 has been slid to the RF position and set to the RF mode.

  Subsequently, it is determined whether or not the focus setting is AF (S55). In the present embodiment, the focusing of the interchangeable lens 100 includes the AF mode, the MF mode, and the RF mode as described above. Of these, the AF mode and the MF mode are displayed on the display monitor 105 of the camera body 100. Set on the menu screen. In this step, it is determined whether or not the AF mode is set on the menu screen. Since the photographer may not be set, any mode is set as a default.

  If the result of determination in step S55 is that AF mode has been set, then reception of lens control commands is stopped (S57). Since the RF mode is set in step S51 described above, even if a lens control command is transmitted from the camera 100 to the interchangeable lens 200, the interchangeable lens 200 is set not to receive the lens control command. The camera body 100 can receive information such as a lens position acquisition signal from the interchangeable lens 200. By acquiring the lens position information, it is possible to perform light emission amount control in consideration of distance information in controlling the strobe 106.

  If the result of determination in step S55 is that the focus setting is not AF mode, then the rotation detection sensor for the MF ring 204 is turned off (S59). As a result of the determination in step S55, the MF mode is set on the camera body 100 side. However, in the interchangeable lens 200, since the MF ring 204 is at the RF position (second position) and the RF mode is set, it is not necessary to detect the rotation state even if the MF ring 204 is rotated. . Therefore, the rotation detection sensor of the MF ring 204, that is, the photo interrupter 225a (see FIG. 5) is turned off.

  Subsequently, MF timer processing is performed (S61). Here, timer processing for measuring the slit hole 204c of the MF ring 204 is performed based on the output from the photo interrupter 225a. The MF timer process will be described later with reference to FIG.

  Once the MF timer process is performed, the rotation detection of the MF ring 204 is stopped (S63). Since the detection sensor is turned off in step S59 and the rotation detection timer is ended in step S61, the rotation detection operation of the MF ring 204 is stopped in this step.

  If reception of the lens control command is stopped in step S57 or if MF ring rotation detection is stopped in step S63, then the RF setting position is read at the timing of L1 (S65). Here, as described with reference to FIG. 6, the encoder unit 226a reads the distance scale 24a with respect to the index 25a. At the time of reading by the encoder unit 226a, the lens communication synchronization signal is used as a timing signal for the detection timer. The lens communication synchronization signal is synchronized with the frame at the time of imaging by the image sensor 103, and is faster than the built-in timer of the lens CPU 221. For this reason, it is possible to use it as a high-speed counter for reading by the encoder unit 226a without adding a timer counter. The read RF setting value may be stored in the flash ROM in the interchangeable lens 200, and may be used as a preset value of the drive position to the distance index position realized by the main body side operation, for example.

  Once the RF setting position is read, the lens is driven to the RF setting position (S67). Here, the lens CPU 221 drives the focus adjustment lens 203 so that the distance corresponding to the RF setting position read in step S65 is in focus. Also in this step S67, by using the lens communication synchronization signal, the drive control of the focus adjustment lens 203 can be performed at high speed, and after the photographer rotates the MF ring 204 to the RF setting position, the setting position can be quickly obtained. You can focus on the camera.

  If the result of determination in step S51 is that the MF ring 204 is not at the RF position, then the distance index setting flag is cleared by tying L1 (S71). Since the MF ring 204 is not located at the RF position (second position) and the RF mode is canceled, the distance index setting flag set in step S53 is reset.

  Subsequently, as in step S55, it is determined whether or not the focus setting is in the AF mode (S73). If the result of this determination is that AF mode has been set, reception of lens control commands is then started (S75). Since the RF mode is not set in step S51 described above, when the lens control command is transmitted from the camera 100 to the interchangeable lens 200, the lens CPU 221 of the interchangeable lens 200 is set to receive the lens control command.

  On the other hand, if the result of determination in step S73 is that the AF mode has not been set, that is, if the MF mode has been set, then the rotation detection sensor of the MF ring 204 is turned on (S77). When the MF mode is executed as the focus adjustment mode, the rotation state such as the rotation direction, the rotation amount, and the rotation speed of the MF ring 204 is detected, and the lens CPU 221 drives the focus adjustment lens 203 according to the detection result. To do. In this step, a sensor for detecting the rotation state of the MF ring 204, that is, the photo interrupter 225a (see FIG. 5) is turned on.

  When the rotation detection sensor of the MF ring 204 is turned on, next, MF timer processing is performed (S79). Here, a timer process for detecting the rotation of the MF ring 204 is performed. At this time, since it is less necessary to read at high speed compared to the RF setting, the timer is counted by the built-in timer of the lens CPU 221. Detailed operation of the MF timer process will be described later with reference to FIG.

  Once the MF timer process is performed, rotation detection of the MF ring 204 is started (S81). Since the output of the photo interrupter 225a changes according to the movement of the slit hole 204c that rotates integrally with the MF ring 204, the rotation state of the MF ring 204 is detected based on the output of the photo interrupter 225a. Based on the detected rotation state, the lens CPU 221 performs drive control of the focus adjustment lens 203.

  When detection of MF ring rotation is started in step S81, reception of a lens control command is started in step S75, or lens driving is performed to the RF setting position in step S67, the MF ring operation detection / operation processing is terminated, Return to the flow.

  Next, detailed operation of the MF timer process in steps S61 and S79 will be described with reference to the flowchart shown in FIG. This MF timer process executes the timer process of a timer counter that counts the clock generated in the interchangeable lens 200 when detecting the rotation state such as the rotation direction, rotation amount, and rotation speed of the MF ring 204.

  When the flow of the MF timer process shown in FIG. 11 is entered, it is first determined whether or not the MF ring 204 is in the RF position, similarly to step S51 (S91). Here, based on the detection result of the position of the MF ring 204, it is determined whether or not it is in the RF position (range focus position, second position).

  If the result of determination in step S91 is that the MF ring 204 is not at the RF position, it is determined whether or not the count of the MF timer counter has ended (S93). In the next step S95, the MF timer count is started, and it is determined whether or not the MF timer count has ended. If the result of this determination is that the MF timer count has ended, the timer count for detecting the rotation of the MF ring 204 is started (S95). The MF timer count is a counter that uses the lens CPU clock in the lens CPU 221.

  If the result of determination in step S91 is that the MF ring 204 is at the RF position, the rotation detection timer count of the MF ring 204 is terminated (S97). When the MF ring 204 is in the RF position, the focus adjustment lens 203 is focused at a position corresponding to the absolute distance indicated by the MF ring 204 by the encoder unit 226a (see FIG. 6). Does not detect relative rotation. Therefore, the rotation detection timer count of the MF ring 204 is ended.

  When the timer count in step S95 is started, or when the MF timer count has not ended as a result of the determination in step S93, or when the timer count has ended in step S97, the MF timer process is ended, Return to flow.

  As described above, in this embodiment, the focus adjustment has three modes of AF mode, MF mode, and RF mode. Switching between these three modes will be described with reference to FIG. In FIG. 12, state 1 is the AF mode, state 2 is the MF mode, and state 3 is the RF mode. Among these, the AF mode and the MF mode can be set on the menu screen of the camera body 100 as described above, and the RF mode can be set by sliding the MF ring 204 of the interchangeable lens 200 to the second position.

  The AF mode in state 1 is maintained when the AF mode is still set as the focus adjustment setting on the menu screen of the camera body 100 and the MF ring 204 is at the MF position (first position). Is done. The MF mode in state 2 is maintained when the MF mode remains set on the camera body 100 side and the MF 204 is at the MF position (first position).

  To switch from the state 1 AF mode to the state 2 MF mode, the camera body 100 may be changed to the MF mode as a focus adjustment setting while the MF ring 204 is maintained at the MF position (first position). . Conversely, to switch from the MF mode to the AF mode, the MF ring 204 may be changed to the AF mode while maintaining the MF ring 204 at the MF position (first position).

  To switch from the AF mode in state 1 to the RF mode in state 3, it is only necessary to slide the MF ring 204 to the RF position (second position), and it is not necessary to change the focus adjustment setting in the camera body 100. Conversely, to switch from the state 3 RF mode to the state 1 AF mode, the MF ring 204 is slid to the MF position (first position) and the focus adjustment setting in the camera body 100 is changed to the AF mode. I do.

  To switch from the state 2 MF mode to the state 3 RF mode, it is only necessary to slide the MF ring 204 to the RF position (second position), and it is not necessary to change the focus adjustment setting in the camera body 100. Conversely, to switch from the state 3 RF mode to the state 2 MF mode, the MF ring 204 is slid to the MF position (first position), and the focus adjustment setting in the camera body 100 is changed to the MF mode. I do.

  As described above, in one embodiment of the present invention, there are three focus adjustment modes of the AF mode, the MF mode, and the RF mode. Of these, the AF mode and the MF mode are the MF ring provided in the interchangeable lens 200. 204 may be set to the first position, and any mode may be set on the camera body 100 side. On the other hand, the RF mode can be set only by setting the MF ring 204 provided on the interchangeable lens 200 to the second position regardless of the setting of the focus adjustment mode on the camera body 100 side. Conventionally, in a camera equipped with an interchangeable lens, the camera is generally a master and the interchangeable lens is in a slave relationship. However, in this embodiment, when the RF mode is set on the interchangeable lens side, the interchangeable lens side becomes the master for focus adjustment. For this reason, the focus adjustment in the RF mode can be executed quickly. That is, the focus adjustment mode can be automatically switched by operating a ring member (MF ring) provided on the interchangeable lens.

  In one embodiment of the present invention, the MF ring 204 as a ring member can perform two operations of a rotation operation and a slide operation. The manual focus adjustment in the MF mode and the distance setting in the RF mode can be performed by the rotation operation, and the RF mode can be set by the slide operation. For this reason, the photographer can quickly switch the focus adjustment mode and adjust the distance simply by operating the MF ring 204 while concentrating on the finder or the like.

  In one embodiment of the present invention, the MF ring 204 as a ring member serves as a manual focus adjustment member in the MF mode at the first position, and serves as a distance setting member in the RF mode at the second position. . For this reason, the adjustment member which has two functions can be shared by one ring member, and can be reduced in size.

  In the embodiment of the present invention, both the AF mode and the MF mode can be switched on the camera body 100 side. However, the focus adjustment mode is not limited to these two on the camera body 100 side. Other focus adjustment modes may be set or only one of the AF mode and the MF mode may be included.

  In the embodiment of the present invention, the MF ring 204 as the ring member has moved between the two positions of the first position and the second position. Of course, the position may be provided.

  In the embodiment of the present invention, the digital camera is used as the photographing device. However, the camera may be a digital single lens reflex camera or a compact digital camera, such as a video camera or a movie camera. It may be a camera for moving images, or may be a camera built in a mobile phone, a personal digital assistant (PDA), a game device, or the like.

  Further, regarding the operation flow in the claims, the specification, and the drawings, even if it is described using words expressing the order such as “first” and “next” for the sake of convenience, it is essential to carry out in this order. It does not mean that.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, you may delete some components of all the components shown by embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

21 ... Bayonet part, 22 ... Base part, 24 ... Distance display ring, 24a ... Distance scale, 24b ... Engagement pin, 25 ... Indicator display part, 25a ... Index, 25b ... Depth of subject index, 100 ... Camera body, 101 ... Camera control circuit, 103 ... Image sensor, 104 ... Focal plane shutter, 105 ... Display monitor, 106 ..Strobe, 107 ... release button, 108 ... battery, 121 ... main body CPU, 122 ... flash ROM, 123 ... RAM, 124 ... image sensor control circuit, 125 ... Strobe control circuit, 126 ... shutter control circuit, 127 ... image processing circuit, 128 ... display circuit, 129 ... operation switch detection circuit, 130 ... power supply circuit, 131 ... Communication circuit 132, first release switch, 133 second release switch, 200 interchangeable lens, 201 lens control circuit, 203 focusing lens, 204 MF ring 204a ... engagement part, 204b ... inner cylinder part, 204c ... slit hole, 205 ... stop ring, 221 ... lens CPU, 222 ... lens drive circuit, 223 ... Lens position detection circuit, 224... MF ring position detection circuit, 224a... Photo interrupter unit, 225... MF position detection circuit, 225a... Photo interrupter, 226. ..Encoder unit, 226b ... code pattern, 226c ... contact point, 227 ... aperture drive circuit, 228 ... RAM, 22 ... lens communication circuit, 301 ... photographer, 303 ... object

Claims (9)

A focus adjusting lens provided in the lens barrel;
A ring member that is rotatable with respect to the lens barrel and is slidable in a first position and a second position;
A focus adjustment mode setting unit provided on the camera body side for setting the focus adjustment mode;
When the ring member slides to the first position, focus adjustment is performed in the focus adjustment mode set in the focus adjustment mode setting unit, and when the ring member slides to the second position. Control for stopping the focus adjustment in the focus adjustment mode by the focus adjustment mode set in the focus adjustment mode setting unit and focusing the focus adjustment lens at a distance corresponding to the absolute position of the ring member. And
An optical apparatus comprising: The focus adjustment mode setting unit can set the manual focus mode,
When the manual focus mode is set and the ring member slides to the first position, the control unit focuses the focus adjustment lens according to the rotation of the ring member. The optical apparatus according to claim 1.   When the ring member is located at the first position, the manual focus mode is set, and the focusing lens is manually focused according to the rotation of the ring member When the ring member slides to the second position, manual focusing is stopped, and the focus adjustment lens is focused according to a distance corresponding to the absolute position of the ring member. The optical apparatus according to claim 2.   The control unit is configured such that when the ring member is positioned at the second position and the focusing lens is focused according to a distance corresponding to an absolute position of the ring member, When the member slides to the first position, when the manual focus mode is set by the focus adjustment mode setting unit, the focus adjustment lens is manually focused according to the rotation of the ring member. The optical apparatus according to claim 2, wherein the optical apparatus is performed. A focus detection unit for performing focus detection;
The focus adjustment mode setting unit can set the auto focus mode,
When the autofocus mode is set and the ring member slides to the first position, the control unit is not related to the rotation of the ring member, and based on the detection in the focus detection unit, The optical apparatus according to claim 1, wherein the focusing lens is focused.   The control unit is configured to automatically focus the focus adjustment lens based on the detection by the focus detection unit when the ring member is located at the first position and the auto focus mode is set. When the ring member slides to the second position, focusing based on automatic focus detection is stopped, and the focus adjustment lens is focused according to the distance corresponding to the absolute position of the ring member. The optical apparatus according to claim 5, wherein alignment is performed.   The control unit is configured such that when the ring member is positioned at the second position and the focusing lens is focused according to an absolute distance of the ring member, the ring member is When the autofocus mode is set by the focus adjustment mode setting unit, the focus adjustment lens is automatically focused based on the detection by the focus detection unit. The optical apparatus according to claim 5. A focus adjustment lens for focusing,
A ring member disposed rotatably with respect to the lens barrel;
A first lens control unit that continuously switches a focus position in accordance with a rotation speed at the time of a rotation operation of the ring member from a focus operation other than the ring member;
A second lens control unit that focuses the focus adjustment lens at a distance corresponding to an absolute position of the ring member from a focus operation other than the ring member;
An optical apparatus comprising:   The ring member is slidable in a first position and a second position in the optical axis direction of the lens barrel, and executes control by the first lens control unit when the ring member is in the first position. 9. The optical apparatus according to claim 8, wherein control by the second lens control unit is executed when the second lens control unit is in the second position.