FR2821171A1 - CAMERA SYSTEM, AND PHOTOGRAPHIC HOUSING AND LENS FOR SUCH A CAMERA - Google Patents

Abstract

A system including a photographic lens (200) having a memory (221) and / or a controller (211), and a camera housing (100) including a controller (111) that can communicate. with the memory and / or the lens controller. The memory and the lens driver operate with first and second energies, respectively, supplied by the camera body when the photographic lens is mounted thereon.Application area: mono reflex cameras -goal.

Description

obtained by machining.

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  The invention relates to a camera system having an camera housing and a photographic lens which is detachably connected to the camera housing, and having a communication system between the housing and the lens. Electrically controlled variable focal length lenses (motorized zoom lenses) having an image size tracking mode, in which the housing can automatically vary the focal length of the lens in order to constantly grasp the object in an image dimension previously established regardless of the distance from the object, within the limits of the focal length range, are known in the art. In recent camera systems having a camera body and an interchangeable photographic lens which is removably connected to the camera body, if the object is to

  electrically controlled variable focal length, of the type described below

  above, having the image size tracking mode, is used, the camera body only prepares the data necessary for a central processing unit CPU of the photographic lens to operate the latter in the tracking mode of image dimension, and it transmits this data to the photographic lens at the same

  time as various order orders.

  However, in accordance with such a data transmission system of the camera system, if it is planned to develop an interchangeable photographic lens having one or more additional functions (for example a function of mi focus on the lens), the camera body on which the camera lens is mounted must prepare camera status data necessary for the camera lens to operate using all of its functions. This complicates various communication processes and various controls of the camera system. Furthermore, if an objective

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  interchangeable photographic system having one or more new functions is mounted on a conventional camera body, it often happens that these new functions cannot be used and can cause a malfunction of the camera body. Therefore, developing an interchangeable photographic lens having one or more new functions is difficult in systems

  of conventional cameras.

  The invention provides a camera system having an camera body and a photographic lens which is detachably connected to the camera body, and includes a communication system between the camera system and the IS photographic lens, the camera system being designed to increase the degree of freedom with which a photographic lens can be further developed so that it has one or more additional new functions, from so as to enhance the general compatibility between previously existing photographic lenses and newly developed photographic lenses for the camera body. For example, in one embodiment there is provided a camera system comprising a photographic lens having at least one lens memory, in which data relating to the photographic lens is stored, and a device for lens control which controls operations performed by the photographic lens; and an apparatus housing comprising a housing controller which can communicate with at least one of the memory and the lens controller; a first energy which can be supplied to the photographic lens i and a second energy which can be supplied to the photographic lens. Photographic lens can be mounted

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  on the device housing and be removed from it. The lens memory and the lens controller operate with the first energy and the second energy, respectively, when the photographic lens is mounted on the camera body. The body controller supplies the first energy to the photographic lens to drive the lens memory to extract lens data from the lens memory when the photographic lens is mounted on the body of the lens. device, and then invalidates the lens memory and supplies the second energy to the lens controller so that the camera controller and the lens controller communicate with each other in the event that the camera controller determines from the lens data retrieved from the lens memory that the photographic lens includes the camera

lens control.

  The apparatus housing may include a housing communication line, a first power line of

  housing and a second housing power line.

  The photographic lens may include a lens communication line, a first lens energy line and a second lens energy line which are connected to the housing communication line, to the first lens line. body energy and the second body energy line, respectively, when the photographic lens is mounted on the camera body. The camera body and the photographic lens can communicate with each other through the camera communication line and the lens communication line. The camera body can supply the first energy to the photographic lens through the first energy line

  of the body and the first line of energy of the objective.

  Similarly, the camera body can provide the

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  second energy to the photographic lens passing through the second energy line of the housing and the second line

of target energy.

  It is desirable that the control device of the housing includes a command line to change a state of the memory of the lens between a validated state and a

invalidated state.

  The camera body can transmit a first command, for example to put the lens control device in a standby mode, to the lens control device through the communication line of the camera and the lens communication line, the lens controller going into standby mode when first order is received; and the housing of the apparatus for transmitting a second command, for bringing the lens control device out of the standby mode to the lens control device via the communication line of the housing and the communication line of the lens, the lens controller exiting standby mode upon receipt of the

second order.

  It is advantageous that the capacity of the second energy is significantly greater than the capacity of the

first energy.

  As a variant, there is provided a camera housing on which a photographic lens can be mounted and from which it can be removed, the photographic lens having at least one of a lens memory, in which data relating to the photographic lens are stored, and a lens control device which controls the operations performed by the photographic lens, the camera body comprising a camera control device which can communicate with at least one of the memory of the lens and the lens controller; a first energy which can be supplied to

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  the photographic objective i and a second energy which can be supplied to the photographic objective. The lens memory and the lens controller operate with the first energy and the second energy, respectively, when the photographic lens is mounted on the camera body. The camera controller provides the first energy to the camera lens to drive the lens memory to extract lens data from the lens memory when the camera lens is mounted on the camera body. the camera, and it then clears the lens memory and provides second energy to the lens controller so that the camera controller and the lens controller communicate with each other in the event o the camera control device determines, from the lens data retrieved from the lens memory, that the photographic lens includes the camera

lens control.

  It is advantageous that the housing of the camera further comprises a communication line of the housing, a first power line of the housing and a second line of energy of the housing, and that the photographic lens comprises a communication line of 2s the objective, a first line of energy of the objective and a second line of energy of the objective which are connected, respectively, to the communication line of the housing, to the first line of energy of the housing and to the second line of energy of the housing, when the photographic lens is mounted on the housing of the camera. The camera body and the photographic lens communicate with each other through the camera communication line and the lens communication line. The camera body supplies the first energy to the photographic lens through the first energy line of the camera body and the first energy line of

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  the objective. The camera body supplies the second energy to the photographic lens through the second camera energy line and the second line

of target energy.

  The controller for the housing may include a command line for changing a state of the memory of

  the objective between a validated state and an invalidated state.

  The camera body can transmit a first command, to put the lens control device in a standby mode, to the lens control device through the communication line of the camera body and the communication line. communication of the objective, the objective control device passing into the standby mode on reception of the first order; and the camera body can transmit a second command, to bring the lens control device out of standby mode, to the lens control device through the communication line of the camera body and the communication line. lens communication, the lens controller exiting standby mode at

second order reception.

  A photographic lens can be provided which can be mounted on and removed from a camera body, comprising a lens memory in which data relating to the photographic lens is stored, and a camera control device. objective which controls operations carried out by the photographic objective. The lens memory and the lens controller operate with a first energy and a second energy which are supplied by the camera body, respectively, when the photographic lens is mounted on the camera body. apparatus. The lens memory is attacked so that the lens data is extracted therefrom and delivered to the camera body under the control of the camera body when the camera body provides the first

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  energy to the memory of the goal. The lens memory is disabled, so that the lens controller communicates with the camera body when the camera body supplies second energy to the lens controller. The photographic lens may further include a lens communication line, a first lens energy line and a second lens energy line which are connected, respectively, to associated lines of the camera body. device when

  the photographic lens is mounted on the housing.

  The photographic lens communicates with the camera body via the lens communication line; the photographic objective receives the first energy from the camera body passing through the first energy line of the objective; and the photographic lens receives the second energy from the camera body through the second energy line of the lens. It is desirable that the photographic lens also include a command line to cause a change in state of the memory of the lens between a state

validated and a state invalidated.

  A camera system can be provided, comprising a camera housing and a photographic lens which can be mounted on and removed from the camera body, a system in which the photographic lens comprises at least one of an objective memory, in which data relating to the photographic objective is stored, and of an electronic device; the housing of the apparatus comprises a housing control device which can communicate with the memory of the lens, a first energy which can be supplied to the photographic lens and a second energy which can be supplied to the photographic lens, the capacity of the second energy being

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  higher than that of the first energy. The lens memory and the electronic device operate with the first energy and the second energy, respectively, when the photographic lens is mounted on the camera body. The camera control device supplies the first energy to the photographic lens in order to attack the memory of the lens in order to extract from this memory data from the lens when the photographic lens is mounted on the camera body. . The camera control device supplies second energy to the electronic device in the event that the camera control device determines, from data extracted from the lens memory, that the photographic lens includes the device.

electronic.

  The invention will be described in more detail with reference to the accompanying drawings by way of non-limiting examples and in which: FIG. 1 is a simplified functional diagram of the basic elements of control systems for a camera body and a photographic lens of a camera system of the single-lens reflex type having a communication system between the housing of the camera and the photographic lens according to the invention; Figure 2 is a simplified block diagram of basic elements of the control system of the camera body; Figure 3 is a block diagram of basic elements of a communication / control system of the photographic lens; FIG. 4 is a simplified block diagram of basic components of a photographic lens which is provided with a lens control device which operates with a first energy, and a peripheral circuit which functions with a second energy;

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  Figure 5 is a simplified block diagram of fundamental components of a photographic lens which is provided with a lens control device and a peripheral device which both operate with the. first energy; Figures 6A and 6B show a flow diagram for the first part of a main process of the camera body, to which the invention is applied; Figure 7 is a flow diagram of the remaining part of the main process of the camera body, to which the invention is applied; Fig. 8A is a flow diagram for a communication identification process comprising an old type communication process and a new type communication establishment request process of the camera body; Fig. 8B is a flow chart of operations performed by a photographic lens, which are executed in accordance with operations of the request process for establishing a new type of communication from the camera body; Fig. 9 is a flow diagram for the process of requesting communication establishment of a new type of the housing of the camera; Fig. 10 is a flow diagram of a process for establishing status information of the camera body; Fig. 11 is a flow chart of a process for establishing image shake compensation data from the camera body; FIG. 12A is a block diagram of basic elements of a control system for the first embodiment of the photographic lens which comprises a device for compensating for image shake i

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  FIG. 12B is a conceptual diagram of a compensation lens (optical image stabilization system) LC of the image shake compensation device; Fig. 13 is a flow diagram of a main process of the first embodiment of the photographic lens; Fig. 14 is a flow diagram for a communication establishment process of a new type of the photographic lens; Fig. 15 is a flow diagram of a 1 ms delay interrupt process of the first embodiment of the photographic lens; Fig. 16 is a flow diagram of the first half of an inverse-INT interrupt process of the first embodiment of the photographic lens; Figure 17 is a flow diagram of the second half of the reverse interrupt process INT of the first embodiment of the photographic lens; Figure 18 is a timing diagram for the communication identification process from the instant the main switch of the camera body is closed until immediately following the start of the communication process of a new type; Fig. 19A is a timing diagram for a connection protocol establishment operation performed between the camera body and the photographic lens at the start of the communication process of a new type; Fig. 19B is a timing diagram for a connection protocol establishment operation performed between the camera body and the photographic lens at the start of the communication process of a new type;

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  Fig. 20 is a timing diagram for a communication process of an old type which is carried out between the housing of the camera and the photographic lens; Fig. 21A is a timing diagram for communication in the communication process of a new type which takes place between the housing of the camera and the photographic lens; Fig. 21B is a timing diagram for communication in the communication process of a new type which takes place between the housing of the camera and the photographic lens; FIG. 22 is a block diagram of basic elements of a communication / control system of a second embodiment of the photographic lens which includes a system for automatic focusing of the lens; Fig. 23 is a flow diagram of a main process of the second embodiment of the photographic lens; Fig. 24 is a flow diagram of a 1 ms delay interrupt process of the second embodiment of the photographic lens; Fig. 25 is a flow diagram of the first half of a reverse-INT interrupt process of the second embodiment of the photographic lens; and Figure 26 is a flow diagram of the second half of the reverse-INT interrupt process of the second

  embodiment of the photographic lens.

  Figure 1 shows basic elements of control systems for a camera housing and an interchangeable photographic lens of an embodiment of a mono SLR camera system -objective (SLR) to which the invention is applied. The housing 100 of the camera is provided with a central processing unit for

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  housing (housing control device) 111 serving as a control device which controls in the broadest sense all of the operations performed by the SLR camera system. The housing 100 of the camera is provided with a frame 103 on which the photographic lens 200 is mounted. A group of communication / control contacts (communication line of the housing) 104 is provided on the mounting 103 located on the housing. The group of communication / control contacts 104 consists of six contacts in this particular embodiment. One of the six contacts serves as an energy contact (constant voltage contact) intended to supply a first energy from the housing 100 of the device to low energy elements (for example a ROM) located in the photographic lens for attacking low energy elements, while another of the six contacts serves as a control terminal by means of which a ROM read-only memory located in the photographic lens 200 is validated or invalidated (that is to say i.e. ON or OFF circuit). An energy contact 105 (VPZ) via which a second energy is supplied from the housing 100 of the camera to the photographic lens 200 is provided on the frame 103 located on the housing. The capacity of the second energy which is supplied from the energy contact 105 (VPZ) to the photographic objective 200 is appreciably greater than that of the first energy which is supplied from the aforementioned contact at constant voltage from the group of communication contacts / control 104. Although the supply voltage of the second energy is higher than the supply voltage of the first energy, the supply voltage of the second energy may be identical to the supply voltage of the first energy or even be lower than the supply voltage of the first energy provided that the energy capacity of the second energy is significantly greater than that of the first

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  energy. Although it is desirable that the communication / control contact group 104 and the energy contact (VPZ) are located on the frame 103 of the housing, the communication / control contact group 104 and the energy contact 105 (VPZ) can be placed behind the frame 103 of the case, in the mirror box of the case 100 of the device, box in which a quick-return mirror is positioned. As a variant, it is possible that the group of communication / control contacts 104 is located on the mounting 103 of the housing and that the energy contact 105 (VPZ) is placed behind the mounting 103 of the housing, in the mirror of the device 100. FIG. 2 shows fundamental elements of the control system of the unit 100 of the device. A photometric SWS switch, a trigger SWR switch, a SWMAIN main switch, an image-shake compensation switch SW1 and an autofocus SWAF switch are connected to the CPU 111 of the body, which serves as control device which controls in the broad sense all the operations of the recording device system

single lens reflex views.

  The power supply to the peripheral circuits of the unit 100 of the device is turned ON and OFF

  when the main SWMAIN switch is.

  closed and open respectively. The energy coming from a battery 113 (power supply) housed in the housing 100 of the apparatus is supplied to each peripheral circuit of the housing 100 of the apparatus by passing through an equalizer (DC / DC converter) 116 when the the main switch SWMAIN is closed, and the energy of the battery 113 for each peripheral circuit of the housing 100 of the device is cut when the main switch SWMAIN is open. The CPU 111 in the enclosure is

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  always supplied with energy by the battery 113 via the controller 116, so that the unit

  CPU 111 of the housing is constantly in operation.

  The housing 100 of the apparatus is provided with an activation pulse circuit 121, a mirror circuit 123, a shutter circuit 125, a film winding circuit 127, a photometry circuit 129 and a distance measurement circuit 131, which are all connected to the CPU 111 of the housing. The SWS photometry switch is closed when a half-step press on a trigger button (not shown) is made on the camera body, and the SWR trigger switch is closed when the trigger button. Immediately after closing the photometry switch SWS, the unit CPU 111 of the housing activates the photometry circuit 129 to perform a photometry operation. At the same time, the unit CPU 111 of the unit calaera and establishes an optimal shutter speed and an optimal value of aperture (number of apertures), and it activates the circuit 121 with activation pulses to perform an activation pulse charging process if necessary. In addition, the unit CPU 111 of the housing activates the distance measurement circuit 131 to determine a focusing fault value, and to carry out an automatic focusing process if a focusing mode was established using the SWAF autofocus switch. Immediately after closing the trigger switch SWR, the unit CPU 111 of the housing activates the shutter circuit 125 to drive a focal shutter mechanism (not shown) in order to expose an image of the film. At the end of an exposure, the CPU 111 of the box activates the circuit 127 for winding the film to wind the film the length of an image and, in the same

  time, to charge the focal shutter mechanism.

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  When the photographic lens of a new type (for example a photographic lens of type KAF III having a central processing unit CPU of lens, a ROM read-only of lens and all the communication functions which correspond to those of the body 100 of the device) 200 is mounted on the box 100 of the device, during the time during which the main switch SWMAIN is closed, the unit CPU 111 of the box closes a switching circuit 115 to ensure a supply of energy from the battery 113 as the aforementioned second energy for the photographic objective 200 passing through the energy contact 105 (VPZ) of the housing 100 of the camera and the associated energy contact 205 (VPZ) of the photographic objective 200, which is in contact with the contact 105 (VPZ) of energy. In addition, if an image shake compensation mode has been set up by means of the image shake compensation switch SW1 and if the photographic lens 200 is provided with a camera shake compensation device image, the CPU 111 of the box delivers at the output to the photographic lens 200 an order of compensation for image shake through communication with the lens to cause the photographic lens 200 to perform a compensation operation of camera shake. If the photographic lens 200 mounted on the housing 100 of the camera is also provided internally with an automatic focusing system for the lens, the CPU 111 of the housing delivers as output defect data in focus (for example the amplitude of the attack of an AF autofocus motor 261 (see FIG. 12A) and the direction of attack of the AF motor 261 in the photographic lens to the photographic lens 200 in passing through a communication with the lens to bring the photographic lens 200 to perform a focusing process

automatic point of this lens.

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  As shown in FIG. 12A, an encoder 231, the autofocus motor AF (focusing lens drive) 261, a group of AF focusing lenses (group S of focusing lenses) Lf and the CPU 211 of the lens form a focus adjustment system

point (electrical component).

  The photographic objective 200 comprises, on a mount 203 of this objective, a group of communication / control contacts (objective communication line) 204 and the energy contact 205 (VPZ). The communication / control contact group 204 and the energy contact 205 (VPZ) come into contact with the communication / control contact group 104 and the 1S energy contact 105 (VPZ) of the housing 100 of the device. , respectively, when the photographic lens 200 is mounted on the frame 103 of the housing 100 of the camera via the frame 203 of the lens. The photographic lens 200 is internally provided with a central lens CPU (LCPU / lens control device / electronic device) 211, a ROM lens read-only memory (LROM / lens memory / memory non-volatile lens) 221, the encoder 231 and a peripheral circuit 241. Various modes and parameters are stored in the ROM memory 221 of the lens. A current focal length (zoom code) and a photographic distance are detected via the encoder 231. The peripheral circuit 241 comprises, for example, as shown in FIG. 12A, image shake compensation motors ( motor X 254 and motor Y 257), the AF motor 261 for autofocus and a motor focal lens (variable focal lens drive) motor 264, all of which are placed in the photographic objective 200. It should be noted 3s that the motor 264 of the variable focal lens driven by a motor is connected to a group of lenses Lz, in

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  wherein the lens group Lf and the lens group Lz constituting at least part of the objective system to

  variable focal length of the photographic lens 200.

  The communication / control contact group 104 of the housing 100 of the camera consists of

  six contacts: a first contact 104a (Fminl / Inverse-

  SCKL), a second contact 104b (Fmin2 / DATAL), a third contact 104c (Fmin3 / RESL), a fourth contact 104d (CONTL), a fifth contact 104e (Fmaxl / Inverse-FBL) and a sixth contact 104f (Fmax2 / inverse-FLB). In the same way, the group of contacts 204 for communication / control of the photographic objective 200 consists of six contacts: a first contact 204a (Fminl / Inverse-SCKL), a second contact 204b (Fmin2 / DATAL), a third contact 204c (Fmin3 / RESL), a fourth contact 104d (CONTL), a fifth contact 204e (Fmaxl / Inverse-FBL) and a sixth contact 204f (Fmax2 / Inverse-FLB) which come into contact with the first to sixth contacts 104a at 104f, respectively, when the photographic lens 200 is

  mounted on the housing 100 of the camera.

  The power line going from the access P13 of the CPU 111 of the housing to the fourth contact 104d constitutes a first energy line of the housing intended to supply the first energy to the photographic objective 200. The line d energy going from the battery 113 to the energy contact 105 (passing through the switching circuit 115) constitutes a second energy line of the housing intended to supply the second energy to the photographic objective 200. The energy line going from the fourth contact 204d to an LAD access of the ROM memory 221 of the objective constitutes a first line of energy of the objective intended to supply energy from the

  camera 100 from camera 200.

  The energy line going from the energy contact 205 to a controller 243 and to a switching circuit 242 constitutes a second energy line of the objective

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  intended to supply energy from the housing 100 of the camera to the CPU 211 of the lens. As shown in FIG. 1, the second energy which is delivered from the housing 100 of the camera to the input of the photographic objective 200 via the energy contacts 105 and 205 (VPZ) is supplied to the CPU 211 of the lens passing through the controller 243 of the photographic lens 200 and also to the peripheral circuit 241 passing through a switching circuit 242 of the photographic lens 200. The ROM memory 221 of the photographic lens 200 operates with constant voltage energy (the first energy) supplied from the fourth contact 204d (CONTL), while the CPU 211 of the lens operates with the second energy having a large capacity of energy supplied from the contact (VPZ) 205. The processing speed and throughput of a CPU unit are generally proportional to the power consumption of the CPU unit. Therefore, in the present embodiment of the single lens reflex type camera system to which the invention is applied, providing the second high energy energy to the photographic lens 200 makes it possible for the photographic objective 200 to be provided internally not only with a CPU unit which achieves a high throughput, but also with high energy components (i.e. components which need a intense current) such as a lens motor and camera shake compensator

image.

  FIG. 3 is a functional diagram of fundamental elements of a communication / control system for the photographic objective 200. The first contact 204a (Fminl / Inverse-SCKL), the second contact 204b (Fmin2 / DATAL), the third contact 204c (Fmin3 / RESL) and the fourth contact 204d (CONTL) of contact group 204 for communication / control of the photographic lens 200

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  are connected to four RES, SIO, Inverse-SCK and CONT ports

  from lens ROM 221, respectively.

  The RES access of the ROM memory 221 of the objective serves as entry access by which the ROM memory 221 of the objective receives as input a restoration signal which changes the state of the ROM memory 221 from the objective of an invalidated state to a validated state. The SIO access of the ROM memory 221 of the lens serves as input / output access for serial communication. The Reverse-SCK access of the ROM memory 221 of the lens serves as an input access by means of which the ROM memory 221 of the lens receives as input a clock signal for a communication coming from the box 100 of the device. The LAD access of the ROM memory 221 of the objective serves as an input access by means of which the ROM memory 221 of the objective receives as input energy at constant voltage (the

  first energy) from the unit 100 of the device.

  The ROM memory 221 of the lens operates as a function of the first energy (energy at constant voltage), which is supplied from the housing 100 of the apparatus so as to be applied to the CONT access of the ROM memory 221 of the 'goal. The ROM memory 221 of the lens is set up so that its state changes from an invalidated state to a state validated by a restoration signal, which is applied as input via the RES access of the ROM memory 221 of the objective to establish the validated state. The objective data written in the ROM memory 221 of the objective are extracted therefrom so as to be output at the housing 100 of the apparatus via the SIO access of the ROM memory 221 of the objective, in synchronism with the clock signal applied as input, via the Inverse-SCK access. The RES access of the ROM memory 221 of the lens and the third contact 204c (Fmin3 / RESL) which is connected to the RES access, also serve as a command line for changing the state of the ROM memory 221 from

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  the objective between a validated state and an invalidated state.

  In other words, the ROM memory 221 of the objective operates, while the first energy is supplied to the fourth contact 204d (CONTL), and the ROM memory 221 of the objective is established so that its state changes from one invalidated state to a validated state if the level of the third contact 204c (Fmin3 / RESL) falls to a low level, and the ROM memory 221 of the lens is set up so that its state changes from a validated state to an invalidated state if the level of the third contact 204c (Fmin3 / RESL) rises to a high level. His time diagram is shown on the

figure 20.

  As shown in Figure 3, the CPU 211 of the lens is provided with eight ports RXD, TXD, TXDEN, Inverse-SCK, P00, P01, INT and VCC and the photographic lens 200 is provided from first to fourth Schmitt rocker inverters VCC1, VCC2, VCC3 and VCC4 resistant to high input voltages. The first contact 204a (Fminl / Inverse-SCKL) is connected to the Reverse SCK access of the unit CPU 211 of the lens via the second and third Schmitt inverters VCC2 and VCC3, and the second contact 204b ( Fmin2 / DATAL) is connected to the RXD port of the CPU 211 unit on the lens and also to each of the two TXD and TXDEN ports of the CPU 211 unit of the lens via a first circuit of

input / output protection 212.

  The RXD access of the CPU 211 of the lens serves as data entry access. The TXD access of the lens CPU 211 serves as the data output access. The TXDEN access of the CPU 211 unit of the objective serves as a control access by means of which the CPU 211 unit of the objective determines if data can be output from the TXD access of the CPU 211 of the lens. The Reverse-SCK access of the CPU 211 unit of 3s the lens serves as input access through which the CPU 211 unit of the lens receives an input signal

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  clock for communication from the unit 100 of the device. When the TXDEN control access of the CPU 211 of the lens is at a high level, if the level of a data output TXD access of the CPU 211 of the lens is high high level, a field effect transistor (TEC) of the first input / output protection circuit 212 is blocked, while a transistor of the first input / output protection circuit 212 is turned on so as to raise a high level access 212a. On the other hand, if the level of the TXD data output access of the CPU 211 of the lens drops to a low level when the TXDEN command access of the CPU 211 of the lens is at a high level, the field effect transistor (TEC) of the first input / output protection circuit 212 is unlocked, while the transistor of the first input / output protection circuit 212 is blocked to thereby lower the access 212a at a low level. Therefore, when the TXDEN control access of the CPU 211 of the lens is at a high level, the level of the TXD data output access of the CPU 211 of the lens is delivered in output of the first input / output protection circuit 212 via an access 212a to be applied in

  input to second contact 204b (Fmin2 / DATAL).

  Since each of the field effect transistor (TEC) and the transistor of the first input / output protection circuit 212 is blocked when the control access TXDEN is at a low level, the access 212a is in a state high impedance regardless of the level of access of

  TXD data output from the CPU 211 of the lens.

  The sixth contact 204f (Fmax2 / Inverse-FLB) is connected to each of the two accesses POO and PO1 of the unit CPU 211 of the lens via a second circuit 213 of input / output protection, while that the fifth contact 204e (Fmaxl / Inverse-FBL) is connected to the INT port of the CPU 211 of the lens via the

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  fourth Schmitt toggle switch VCC4 resistant to high input voltages. The POO access of the CPU 211 of the lens serves as an output access, while the PO1 access of the CPU 211 of the lens serves as a control access through which the CPU unit 211 of the lens determines whether the data can be output from the OOP access. The INT access of the CPU 211 of the lens serves as an input access through which the CPU 211 of the lens receives a signal

of interruption.

  When the control access PO1 of the unit CPU 211 of the objective is at a high level, if the exit of access POO of the unit CPU 211 of the objective rises at a high level, a transistor field effect (TEC) of the second input / output protection circuit 213 is blocked, while a transistor of the second input / output protection circuit 213 is disengaged to thereby raise access 213a to a high level . On the other hand, if the level of the output port POO of the unit CPU 211 of the objective drops to a low level when the command access PO1 of the unit CPU 211 is at a high level, the transistor with field effect (TEC) of the second input / output protection circuit 213 is unlocked, while the transistor of the second input / output protection circuit 213 is blocked, thus causing the access 213a to fall to a low level. Therefore, when the POO output access of the CPU 211 of the lens is at a high level, the level of the POO output access of the CPU 211 of the lens is output from the second input / output protection circuit 213 passing through access 213a to be applied as input to

  sixth contact 204f (Fmax2 / Inverse-FLB).

  Since each of the field effect transistor (TEC) and the transistor of the second input / output protection circuit 213 is blocked when the control access PO1 is at a low level, the access 213a is in a state high impEJance regardless of the level of the OOP exit access

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of the CPU 211 of the lens.

  The energy contact 205 (VPZ) is connected to the energy access VCC of the unit CPU 211 of the lens by means of a controller 243. The unit CPU 211 of the lens operates under constant voltage supplied

  via the 243 controller to the VCC energy access.

  A selection between the communication channel for communication between the CPU 111 of the housing and the ROM memory 221 of the lens (that is to say communication of the ROM memory of the lens / communication of an old type) and the communication channel for communication from the CPU 111 of the housing with the CPU 211 of the lens (that is to say a communication of a new type) depends on a restoration signal applied as input at the third contact 204c (Fmin3 / RESL). If the level of the input access RES of the ROM memory 221 of the lens rises to a high level, the ROM memory 221 of the lens goes into an invalidated state and the access SIO of the memory

  ROM 221 of the lens goes into a high impedance state.

  This makes possible the aforementioned objective communication of a new type between the CPU 111 of the housing and

the CPU 211 of the lens.

  The first contact 204a (Fminl / Inverse-SCKL), the second contact 204b (Fmin2 / DATAL), the third contact 204c (Fmin3 / RESL), the fifth contact 204e (Fmaxl / Inverse-FBL) and the sixth contact 204f (Fmax2 / Inverse-FLB) maintain compatibility with conventional camera systems using interchangeable lenses in which serial communication between a camera body and an interchangeable lens is performed without using ROM ROM (lens ROM memory) located in an interchangeable lens. For example, to maintain compatibility with a camera housing that can obtain the minimum opening number and maximum opening number from

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  the photographic lens mounted on the housing of the camera, diodes intended to use the first, second, third, fifth and sixth contacts 204a, 204b, 204c, 204e and 204f as information contacts d opening so that the casing of the camera can receive as input data relating to the minimum number of opening (the number f / maximum opening) via the first, second and third contacts 204a , 204b and 204c and that the device housing can receive as input data concerning the maximum opening number (the number f / at the minimum opening) via the fifth and sixth contacts 204e and 204f, are selectively placed in such a way that the IS case the device can distinguish between the maximum number of openings and the minimum number of openings by checking

  the continuity of each contact via the diodes.

  Figure 4 is a simplified block diagram of basic components of a photographic lens 200a which is provided with a lens unit 211a and a peripheral circuit 241a. The objective CPU 211a operates with the first energy supplied from the fourth contact 204d (CONTL), while the peripheral circuit 241a operates with energy supplied from the energy contacts 105 and 205 (VPZ) . In the photographic objective 200a shown in FIG. 4, the energy supplied from the energy contacts 105 and 205 (VPZ) is applied to the peripheral circuit 241a by

  through the switching circuit 242.

  FIG. 5 is a simplified block diagram of fundamental components of a photographic lens 200b which is provided with a lens unit 211b and a peripheral device 241b. The objective CPU 211b operates with the first energy supplied from the third contact 204d (CONTL). The photographic objective Ob shown in FIG. 5 is not provided with a contact

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  energy or a regulator corresponding to the contact

  205 (VPZ) or 243 controller, respectively.

  Each of the CPU 211b of the objective and the peripheral circuit 241b operates with the first energy supplied from the fourth contact 204d (CONTL). In the photographic objective 200a shown in FIG. 4, the housing 100 of the camera supplies the first energy and the second energy to the fourth contacts 104d and 204d (CONTL) and to the energy contacts 105 and 205 ( PZV), respectively. Furthermore, in the photographic objective 200b shown in FIG. 5, the housing 100 of the camera supplies only the first energy to the fourth contacts 104d

and 204d (CONTL).

  The following are basic operations performed by the housing 100 of the camera and the photographic lens 200, in detail, with reference to the flow charts shown in Figures 6A to 11 and the timing diagrams shown in the Figures 18 to 21B. Figs. 6A and 6B show a flow diagram of the main process for the housing 100 of the camera, which is executed by the CPU 111 of the housing. The command addresses the main process immediately after the battery 113 has been charged in the housing 100 of the device. The housing 100 of the camera performs a communication of an old type (communication with the ROM memory of the lens) and a communication of a new type between the housing 100 of the camera and the photographic lens 200, then that the housing 100 of the camera performs only the communication of an old type (communication with the ROM memory of the lens) between the housing 100 of the camera and the photographic lens 200 if this photographic lens 200 is of another type which is not provided with any CPU unit corresponding to the CPU 211 of the photographic lens 200, but is only provided with a lens ROM memory, and which, by

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  Therefore, has no possibility of communication.

  It should be noted that operations or processes having step numbers with a prefix "CS" relate to a command / operation performed by the housing 100 of the camera and that operations or processes having numbers of steps with a prefix "LS" relate to an order / operation carried out by

the photographic lens 200.

  We will list below fundamental orders for

  the description of this embodiment of the

  single-lens reflex camera system

  goal. All the orders listed below are those that are transmitted from the camera 100 to the lens

photographic 200.

  [Orders transmitted from the camera body to the lens to request the lens to transmit data to the camera body]: Order to bring the camera lens to

  send its status to the device box.

  71: Order to bring the photographic lens to send its state to the camera body and to bring the CPU of the lens to enter a standby mode,

  at the same time as the housing CPU.

  72: Order to bring the photographic lens to 2s send information on functions possessed by this photographic lens, such as a camera shake compensation function and a focus function

  automatic lens point, to the camera body.

  7F: Order for a rear converter.

  [Orders for data transmission from the camera body to the lens] B0: Order to send data to the photographic lens. B1: Order to send data to the photographic lens and to switch the CPU from

the lens in a standby mode.

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  B2: Order to send data to the photographic lens on the amplitude of the attack of the autofocus motor located in the photographic lens. [Instruction orders transmitted from the camera body to the lens] D0: Order to pass the CPU unit from the lens

in standby mode.

  D1: Order to deactivate a

image shake compensation.

  D2: Order to activate the compensation function

image shake.

  D3: Order to stop the attack on the focus motor

  automatic point located in the photographic lens.

  D4: Order to resume attack on the betting engine

  at the automatic point located in the photographic lens.

  In the main process shown in Figures 6A and 6B, it is first determined whether the main switch SWMAIN is closed (step CS101). The operation performed in step CS101 is repeated until the main switch SWMAIN is closed. If the main switch SWMAIN is closed (if the answer is YES in step CS101),

  a communication identification process (i.e.

  say a communication process of an old type at a step CS103 and a request to establish communication of a new type at a step CS105) is executed. An order 72 is transmitted to the objective

  photographic for data to be collected from it

  ci (step CS107). Order 72 requests the CPU 211 of the lens to output to the CPU 111 of the housing information relating to the functions possessed by the photographic lens. The functions of the photographic lens may include, for example, a camera shake compensation function, an auto focus function of the lens and other functions which are performed using energy (the

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  second energy) supplied from VPZ energy contacts. In the present embodiment of the SLR camera system, this information regarding the functions possessed by the photographic lens is represented by 1 byte data (8 bit data), in which the sixth bit represents the presence or absence of the autofocus function, while the fourth bit represents the presence or absence of the image shake compensation function. Upon receipt of an order 72, the CPU 211 of the photographic objective 200 (of a new type) delivers as output to the CPU 111 of the housing information concerning the functions possessed by the photographic objective 200 Figure 18 shows a time diagram for the above-mentioned communication identification process, from the moment the main switch SWMAIN is closed until the instant immediately following the start of the communication process. of a new type. Figs. 19A and 19B each show a time diagram of a connection protocol establishment operation performed between the housing 100 of the camera and the photographic lens 200 at the start of the communication process. Figure 20 shows a time diagram for the communication process of an old type. Figures 21A and 21B show timing diagrams for

  the communication process of a new type.

  After the operation carried out in step CS107, the unit CPU 111 of the housing sets to "0" an objective watch flag SLP (step CS109). The SLP objective standby flag "1" or "0" indicates that the objective's CPU 211 is in standby mode (low energy operation mode) or is not in standby mode , respectively. The operations or processes carried out in steps CS103 to CS109 are executed when the main switch SWMAIN is passed from the state

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  open in closed state. Then the operations executed at

  from step CS111 are repeated. At step CS111, ON / OFF states of all accesses are applied as input

  of switches. Next, a process for establishing status information of the camera is executed (step CS113). In the process of establishing camera status information, information regarding the current states of certain specific switches and switches and a flash system charging system which are to be transmitted to the CPU 211 of the lens via communication of a new type are prepared. Ensite, the communication process of an old type is executed (step CS115), and it is determined whether a photographic lens is mounted on the housing 100 of the camera (step CS117). If no photographic lens is mounted (if the answer is YES in step CS117), each of the fourth contact 104d (CONTL) and of the energy contact 105 (VPZ) is set at a low level (step CS119), and control returns to step CS101. If it is determined in step CS117 that a photographic lens is mounted (if the answer is NO in step CS117), it is determined if a flag of a new type is at "1", it is ie if the photographic lens then mounted on the housing 100 of the apparatus is the photographic lens 200 (of a new type) (step CS121). The flag of a new type "1" indicates that the photographic lens then mounted on the housing 100 of the apparatus is the photographic lens 200 (of a new type). If the flag of a new type is at "1" (if the answer is YES at step CS121), it is determined whether a PH energy maintenance flag is at "0", that is to say tell if the unit 100 of the device is not in an energy maintenance mode (step CS123). If the PH energy maintenance flag is at "0" (if the answer is YES at step CS123), it is determined whether the standby flag for

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  the SLP objective is at "1" (step CS125). If the standby flag of the SLP lens is "1" (if the answer is YES in step CS125), the command returns to step CS111, because the photographic lens 200 is already in a standby state . If it is determined in step CS125 that the lens standby flag SLP is not "1", an order B1 is transmitted to the unit CPU 211 of the lens to pass the photographic lens 200 in the standby mode (step CS127). Then, the SLP objective watch flag is set to "1" (step CS129), and control returns to

step CS111.

  If it is determined at step CS123 that the energy maintenance flag PH is not at "0" (if the answer is NO at step CS123), an order B0 is transmitted to the CPU 211 of the lens to start the CPU 211 of the lens (step CS131), and the lens standby flag SLP is set to "0" (step CS133). It is next determined whether a lens shake type compensation flag is "1", that is, if the photographic lens 200 mounted on the camera body 100 is provided 'an image shake compensation device (step CS135). If the camera shake compensation type objective flag is "1" (if the answer is YES at step CS135), a process for establishing camera shake compensation data, in which flags and predetermined data relating to image shake compensation are set, is executed (step CS137), and control proceeds to step CS139. If the camera shake compensation type objective flag is not "1" (if the answer is NO at step CS135), the command skips step CS137 to go directly from step CS135 at step CS139. If it is determined in step CS121 that the flag of a new type is not "1", the command passes

  directly from step CS121 to step CS139.

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  In step CS139, it is determined whether a SWMAIN flag is "0", that is to say if the main switch SWMAIN from the closed step is changed to the open state. If it is determined in step CS139 that the SWMAIN flag is not at "1" (if the answer is NO in step CS139), it is determined if the photometry switch SWS is closed (step CS141 ). If the photometry switch SWS is not closed (if the answer is NO in step CS141), control returns to step CS111. If the photometry switch SWS is closed (if the answer is YES in step CS141), the control goes to a step CS151. If it is determined at step CS139 that the SWMAIN flag is at "1", it is determined if the flag of a new type is at T'1 "(step CS143). If it is determined at step CS143 that the flag of a new type is not at "1", control returns to step CS101. If it is determined in step CS143 that the flag of a new type is at "1 "(that is to say that the photographic objective (of a new type) 200 is then mounted on the housing 100 of the camera), it is determined at a step CS145 if a second energy flag VpzONCPU is at "1", that is to say if the photographic objective 200 mounted on the housing 100 of the camera is of a type which operates with energy supplied from the energy contact 105 ( If it is determined in step CS145 that the second energy flag VpzONCPV is at "1" (if the answer is YES in step CS145), the access VPZ is turned OFF, it is i.e. the energy supplied to the energy contact 105 ( VPZ) is cut (step CS147), and control returns to step CS101. If it is determined in step CS145 that the second energy flag VpzONCPU is not at "1" (if the answer is NO in step CS145), the control returns to step CS101 because the photographic lens mounted on the housing 100 of the camera does not work with energy supplied from the

energy contact 105 (VPZ).

  We will describe below, with reference to the flowchart

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  shown in Figure 7, operations which are executed after it has been determined in step CS191 that

  the SWS photometry switch is closed.

  If it is determined in step CS141 that the photometry SWS switch is closed (if the answer is YES in step CS141), a photometry operation, in which photometric data is applied as input from a sensor photometry, and an arithmetic exposure operation are executed in accordance with a photometry mode then selected and an exposure mode then selected, respectively (step CS151). Then, data from an AF autofocus sensor is applied as input from an AF sensor in accordance with an AF autofocus mode then selected, while an arithmetic AF autofocus operation predetermined, necessary to achieve a state to the point, is executed in accordance with

  input AF sensor data (step CS153).

  Then, it is determined whether the flag of a new type is "1" (step CS155). If the flag of a new type is "1" (if the answer is YES at step CS155), it is determined whether an AF autofocus flag of the lens is "1", it is that is, if the photographic lens 200 mounted on the housing 100 of the camera has an autofocus function (step CS157). If the objective AF flag is at "1" (if the answer is YES at step CS157), it is determined whether an AFON flag is at "1" (step CS159). The AFON flag at "1" indicates that the AF autofocus function is active, that is, the autofocus function is in action. If the AFON flag is "1" (if the answer is YES at step CS159), data regarding a degree of training of an AF lens (AF group) from the photographic lens are transmitted to the CPU 211 of the lens (step CS161), and control then passes to

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  a step CS163. If at least one of the flag of a new type, of the objective AF flag and of the AFON flag is not at "1", the command skips the operation carried out in step

CS161 and go to step CS163.

  In step CS163, it is determined whether a state in point has been obtained. If a state in point has not been obtained (if the answer is NO in step CS163), the control returns to step CS111 shown in FIG. 6A. Therefore, in the present embodiment of the single-lens reflex camera system, a focus priority control is adapted in which the shutter cannot be released unless a state in point is obtained. A command giving priority to the release, in which the shutter can be released even in a state not perfect, can be adopted. In this case, the operation performed in step CS163

is deleted.

  If it is determined in step CS163 that a point state has been obtained (if the answer is YES in step CS165), it is determined if the trigger switch SWR is closed (step CS165). If the trigger switch SWR is open (if the answer is NO at step CS165), the

command returns to step CS111.

  If the trigger switch SWR is closed (if the answer is YES in step CS165), it is determined whether the flag of a new type is "1" (step CS167). If the flag of a new type is 1 (if the answer is YES in step CS167), an RLS trigger phase indicator is set to "1", and the information present on the RLS indicator "1 "is transmitted to the unit CPU 211 of the objective (step CS169). Then, the command passes to a step CS171. If the flag of a new type is not 1 (if the answer is NO at step CS167), the command skips step CS169 to go directly from step CS167 to a step CS171, so that l information on the RLS indicator "1" is not transmitted to the CPU

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  211 of the lens. The trigger phase indicator RLS "1" informs the photographic lens 200 of a phase in which the rapid return mirror moves to its retracted position after the trigger switch SWR has been closed. In step CS171, the circuit 123 of the mirror is activated so as to drive a motor for driving the mirror so that the quick-return mirror of the housing 100 of the apparatus

  of shooting rises to a retracted position.

  Then, it is determined whether the flag of a new type is "1" (step CS173). If the flag of a new type is 1 (if the answer is YES in step CS173), the RLS trigger phase indicator is set to "2", and information on the RLS phase indicator " 2 "is transmitted to the unit CPU 211 of the objective (step CS175). Then, the command passes to a step CS177. If the flag of a new type is not 1 (if the answer is NO at step CS173), the command skips step CS175 to go directly from step CS173 to step CS177, so that the information from the RLS indicator "2" is not transmitted to the CPU 211 of the lens. The trigger phase RLS "2" indicator informs the photographic lens 200 of a phase in which a film image is being exposed after the mirror returns

  2s rapid is raised to its retracted position.

  In step CS177, the shutter circuit 125 is activated so as to drive the focal shutter mechanism to perform an exposure operation. At the end of the exposure operation, it is determined whether the flag of a new type is 1 (step CS179). If the flag of a new type is 1 (if the answer is YES in step CS179), the RLS trigger phase indicator is set to "3", and the information of this RLS indicator "3" is transmitted to the unit CPU 211 of the objective (step CS181). Then, the command passes to a step CS183. If the indicator of a new type is not 1 (if the answer

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  is NO at step CS179), the command skips step CS181 to go directly from step CS179 to step CS183, so that the information carried by the RLS indicator

  "3" is not transmitted to the CPU 211 of the lens.

* The trigger phase indicator RLS "3" informs the photographic lens 200 of a phase in which the film is wound after the completion of the operation

of exhibition.

  In step CS183, a film winding operation, in which the film winding circuit 127 is activated to drive a film motor (shutter charge motor) in order to wind a film. film image, is performed, while an operation

  charging the shutter is executed (step CS183).

  Then, it is determined whether the flag of a new type is "1" (step CS185). If the flag of a new type is 1 (if the answer is YES at step CS185), the RLS trigger phase indicator is set to "0", and information about this RLS indicator "0" is transmitted to the unit CPU 211 of the objective (step CS187). The command then returns to step CSlll. If the indicator of a new type is not at 1 (if the answer is NO at step CS185), the command skips step CS187 to return directly from step CS185 to step CS111, by 2s so that the information from the RLS indicator "0" is not transmitted to the CPU 211 of the objective. The trigger phase indicator RLS "0" informs the photographic lens of a phase in which the aforementioned film winding operation has been completed, that is to say a state in which the shutter can be triggered. In the triggering process described above in step CS151 and from this, the triggering phase indicator RLS which indicates a phase in the triggering process is transmitted to the CPU 211 of the goal every time each phase of the process

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  triggering is completed, if the photographic lens (of a new type) is mounted on the housing 100 of the camera. This allows the photographic lens 200 to perform operations which correspond to the state and the operating phase of the housing 100 of the camera.

Shooting.

  The communication identification process, which is composed of the communication process of an old type in step CS103 and the request to establish communication of a new type in step CS105, will be described below. after in detail with reference to the flowcharts shown in Figures 8A and 8B. Figure 8A shows operations of the communication identification process, while Figure 8B shows operations of the photographic lens 200 which are executed by the lens CPU 211 in accordance with operations of the request process d communication establishment of a new type in step CS105. The process for requesting establishment of a new type of communication in step CS105 includes operations carried out in steps CS203 to CS215,

shown in Figure 8A.

  The command addresses the communication identification process immediately after powering up the unit 100 of the device. The identification process of 2s communication is executed to identify the type of photographic objective 200 and the communication protocols used for it. Immediately after switching on the unit 100 of the device (that is to say immediately after it has been determined that the main switch SWMAIN is closed in step CS101), the command approaches the communication process of an old type in step CS103. In the communication process of an old type in step CS103, it is determined whether the photographic lens then mounted on the housing 100 of the camera is provided with a ROM ROM of which the unit Case CPU 111 can

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  extract any predetermined data concerning the lens and, then, the communication of an old type (communication with the ROM memory of the lens) is carried out in accordance with communication protocols used for the photographic lens having such a ROM memory d The lens, if it is determined that the photographic lens then mounted on the camera unit 100 is provided with such a lens ROM. In the communication with the ROM memory of the objective, predetermined data of the objective written in the ROM memory 221 of the objective are extracted therefrom. This target data includes data relating to the

  type of photographic objective lens then mounted.

  After the completion of the communication with the ROM memory of the lens, it is determined, from the result of the communication with the ROM memory of the lens, whether the photographic lens 200 then mounted on the housing 100 of the camera is a new type of photographic lens (step CS203). If it is determined that a new type of photographic lens is not mounted on the camera unit l00 (if the answer is NO at step CS203), the command exits the communication identification process and, from this moment, only the communication of an old type (communication with the lens ROM memory) is carried out between the photographic lens 200 and the body

100 of the device.

  If it is determined in step CS203 that the photographic lens 200 mounted on the camera unit 100 is a new type of photographic lens (if the answer is YES in step CS203), it is determined whether the photographic objective 200 then mounted (new type) is of a type (type VpzON) which operates with energy supplied from the energy contact 105 (VPZ) (step CS205). If the photographic lens 200 then mounted is a VpzON type lens (if the answer is YES in step

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  CS205), the energy contact 105 (VPZ) is closed; in other words, energy is applied to the energy contact 105 (VPZ) (step CS207). Then, the command passes to a step CS209. Otherwise, if the photographic objective 200 then mounted is not a VpzON type objective (if the answer is NO at step CS205), the command skips step CS207 to pass directly from step CS205 to the step CS209, so that no energy

  is only supplied to energy contact 105 (VPZ).

  In step CS209, the level of the fifth contact 104e (Fmaxl / Inverse-FBL) is caused to fall to a low level (level "Lo" or "L"), and then it is determined whether the level of the sixth contact 104f (Fmax2 / Inverse-FLB) is a low level (step CS211). The operation performed in step CS211 is repeated as long as the level of the sixth contact 104f (Fmax2 / Inverse-FLB) is a high level. If it is determined in step CS211 that the level of the sixth contact 104f (Fmax2 / Inverse-FLB) is at a low level (if the answer is YES in step CS211), the level of the fifth contact 104e (Fmaxl / Inverse-FBL) is raised to a high level ("Hi" or "H" level) (step CS213), and then it is determined whether the level of the sixth contact 104f (Fmax2 / Inverse-FLB) is at a high level (step CS215). The operation carried out in step CS215 is repeated as long as the level of the sixth contact 104f (Fmax2 / Inverse-FLB) is a low level. If it is determined in step CS215 that the level of the sixth contact 104f (Fmax2 / Inverse-FLB) is a high level (if the answer is YES in step CS215), this means that the photographic objective 200 ( of a new type) mounted on the unit 100 of the device operates normally, so that the control exits from the communication identification process and, from this moment, a communication of a new type is effectuce between the photographic lens 200 (the CPU unit 211 of the lens) and the housing 100 of the camera (the CPU unit 111

of the housing).

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  Furthermore, while the unit 100 of the apparatus performs the operations in steps CS207 to CS215, the photographic lens 200 (of a new type) performs the operations represented by the flowchart shown in FIG. 8B. If the energy contact 105 (VPZ) is supplied with energy in step CS207, this energy is supplied to the photographic objective 200 via the energy contact 205 (VPZ). This causes the controller 243 to apply a constant voltage to the unit CPU 211 of the lens, which, consequently, causes the unit CPU 211 of the lens to initialize its internal RAM memory (step LS201). Then, it is determined whether the level of the fifth contact 204e (Fmaxl / Inverse-FBL) is a low level (step LS203). The operation carried out in step LS203 is repeated as long as the level of the fifth contact 204e (Fmaxl / Inverse-FBL) is a high level. If it is determined, via the fifth contact 204e (Fmaxl / Inverse-FBL) and the INT access of the CPU 211 of the objective, that the level of the fifth contact 204e (Fmaxl / Inverse- FBL) falls to a low level due to the operation effectuce in step CS209 (if the answer is YES in step LS203), the level of the sixth contact 204f (Fmax2 / Inverse- (FLB) is caused to fall at a low level via the access P00 of the lens unit CPU 211 (step ES205). Next, it is determined whether the level of the fifth contact 209e (Fmaxl / Inverse-FBL) is a level The operation performed in step LS207 is repeated as long as the level of the fifth contact 204e (Fmaxl / Inverse-FBL) is low. If it is determined that the level of the fifth contact 104e ( Fmaxl / Inverse-FBL) rises to a high level due to the operation carried out in step CS213 (if the answer is YES in step LS207), the level of the sixth contact 204f (Fmax2 / Inverse-FLB) is raised to a high level (step LS209). Then, the command exits from the communication identification process and, from this

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  At the moment, the communication of the new type is carried out between the photographic objective 200 (of the new type) (the unit CPU 211 of the objective) and the housing 100 of

  the device (the CPU 111 of the housing).

  FIG. 18 shows a time diagram for the communication identification process which is executed between the CPU 111 of the housing 100 of the camera and the CPU 211 of the photographic lens 200. In the process of communication identification, the fifth contacts 104e and 204e (Fmaxl / Inverse-FBL) and the sixth contacts 104f and 204f (Fmax2 / Inverse-FLB) are used to serve as connectors / lines of establishment of

  link protocol (see Figures 19A and 19B).

  Immediately after switching on the housing 100 of the device, the CPU 111 of the housing raises the level of the fourth contact 204d (CONTL) to a high level in order to execute communication of an old type (communication

  with the lens ROM).

  [Communication of an old type (communication with the ROM ROM of the lens)] Figure 20 shows a time diagram for the process of communication of an old type between the housing 100 of the camera and the photographic lens 200, that is to say between the CPU 111 of the housing and the ROM memory 221 of the lens. In communication with the lens ROM, predetermined lens data written to the lens ROM 221 is extracted therefrom. Levels of the first contact 104a (Fminl / Inverse-SCKL), of the third contact 104c (Fmin3 / RESL) and of the fourth contact 104d (CONTL) of the contact group 104 for communication / control of the unit's housing 100 before the start of communication with the ROM memory of the lens are a high level, a high level and a low level, respectively. The second contact 104b (Fmin2 / DATAL) before the start of the communication with the lens ROM memory is in a

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  high impedance state (floLtant state).

  The CPU 111 of the housing raises the level of the fourth contact 104d (CONTL) to a high level to activate the ROM memory 221 of the lens at the start of

  s communication with the objective's ROM memory.

  Then, after waiting for a predetermined period necessary for the stable operation of the ROM memory of the lens, the CPU 111 of the housing causes the level of the third contact 104c (Fmin3 / RESL) to drop to a low level to cause the the state of the ROM memory 221 of the objective from an invalidated state to a validated state. Then, if the CPU 111 of the box delivers a signal at the output

  from the first contact 104a (Fminl / Inverse-

  SCKL), the ROM memory 221 of the objective extracts predetermined data from an internal ROM memory of this objective to output the predetermined data to the second contact 204b (Fmin2 / DATAL) so that the CPU 111 of the housing receives in between the predetermined data

  via the second contact 104b (Fmin2 / DATAL).

  The CPU 111 of the housing raises the level of the third contact 104c (Fmin3 / RESL) to a high level by receiving as input a predetermined number of bytes of data from the objective. Information concerning the type of objective is included in the data obtained via the communication described above with the ROM memory of the objective, and includes data (objective bit of a new type = "1") for the identification of the photographic objective of a new type (that is to say a objective which can carry out the communication of a new type) and of data (bit VpzONCPU = "1") for the identification of the need for an energy supply. The CPU 111 of the housing 100 of the camera identifies whether or not the photographic lens 200 mounted on the housing 100 of the camera is a new type of photographic lens to

from this data.

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  [Communication of a new type] At the end of the communication of the old type, the unit CPU 111 of the box begins the supply of energy to the energy contacts 105 and 205 (VPZ). Then, the unit CPU 111 of the housing drops the level of the fifth contact 104e (204e) (Fmaxl / Inverse-FBL) to a low level to interrupt the unit CPU 211 of the objective, and waits until the level of the sixth contact 104f (204f) (Fmax2 / Inverse-FLB) drops to a low level, i.e. waits for the CPU 211 of the lens to lower the level of the sixth contact 204f (Fmax2 / Inverse-FLB). The fifth contact 104e (204e) (Fmaxl / Inverse-FBL), the sixth contact 104f (204f) (Fmax2 </ Inverse-FBL) and the second contact 104b (204b) (Fmin2 / DATAL) correspond to a first communication contact / command, a second communication / command contact and an input / output contact

data, respectively.

  Following the interruption of the CPU 111 unit in the housing, the CPU 211 unit of the lens "wakes up" and operates normally if it is in standby mode, and initializes its RAM memory internal. Then, at the end of the initialization operation, the CPU 211 of the objective lowers the level of the sixth contact 204f (Fmax2 / Inverse-FLB), and waits for the level of the fifth contact 204th (104th) (Fmaxl / Inverse-FBL) amounts to

a high level.

  Immediately after the level of the sixth contact 104f (204f) (Fmax2 / Inverse-FLB) drops to a low level, the unit CPU 111 switches the level of the fifth contact 104e (204e) (Fmaxl / Inverse-FBL) at a high level, and waits for the level of the sixth contact

  104f (204f) (Fmax2 / Inverse-FLB) rises to a high level.

  Immediately after raising the level of the fifth contact 204e (104e) to a high level (Fmaxl / Inverse FBL), the unit CPU 211 of the lens raises the sixth contact 204f (104f) (Fmax2 / Inverse-FLB) to a high level

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  to complete the communication identification process. After having identified that the level of the sixth contact 104f (204f) (Fmax2 / Inverse-FLB) has risen to a level s high, the CPU 111 of the objective completes the process

communication identification.

  From this moment, data and orders are transmitted between the housing 100 of the camera and the photographic lens 200 via the

communication of a new type.

  The process of establishing state information of the camera camera executed in step CS113 will be described below in detail with reference to the flowchart shown in Fig. 10. In the process of establishing status information of the camera, information concerning the current states of specific switches and switches and of a flash charging system which must be transmitted to the CPU 211 of the objective through communication of a new type are prepared. In particular, in the present embodiment of the camera system of the single-lens reflex type, it is determined whether the automatic focusing system of the camera body 100 is in operation, if a flash electronic (strobe pulse) is in the middle of the load, if the time of an energy maintenance timer has elapsed since the opening of the photometric switch SWS, and if the main switch SWMAIN is closed, flags which indicate these states being positioned as

that state information.

  In the process of establishing camera state information, it is determined whether

  the photometry switch SWS is closed (step CS301).

  If the photometry switch SWS is closed (if the answer is YES in step CS301), it is determined whether the automatic focus switch SWAF is closed,

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  that is to say if the automatic focusing mode has been established by means of the switch SWAF (step CS303). If the SWAF interoptor is closed (if the answer is YES in step CS303), the AFON flag is set to "1" (step CS305) and the control then passes to a step CS309. If the automatic focus switch SWAF is not closed (if the answer is NO in step CS303), the AFON flag is set to "0" (step CS307) and control then proceeds to step CS309. If the switch SWAF is not closed (if the answer is NO at step CS301), the AFON flag is set to "0" (step CS307),

  and control then proceeds to step CS309.

  In step CS309, it is determined whether the electronic flash is being charged. If the electronic flash is charging (if the answer is YES in step CS309), a PAUSE flag is set to "1" (step CS311), and control then goes to step CS315. The PAUSE flag is set to "1" when any high energy operation, which requires intense current, is in progress. The charging operation of the electronic flash corresponds to a high energy operation in the present embodiment of the SLR camera system. Consequently, the PAUSE flag is set to "1" when the electronic 2s flash is charging. When the PAUSE flag is at "1", the photographic objective 200 suspends all these high energy operations. The film winding operation and the shutter charging operation are also high energy operations performed in this embodiment of the system.

SLR camera.

  In step CS315, it is determined whether the photometry switch SWS is closed. If the photometry switch SWS is closed (if the answer is YES in step CS315), the energy maintenance flag PH is set to "1" (step CS321) and the command then proceeds to a step

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  CS323. If the photometry switch SWS is not closed (if the answer is NO in step CS315), it is determined whether the time of the energy holding timer has elapsed (step CS317). If the time of the energy maintenance timer has elapsed (if the answer is YES in step CS317), the energy maintenance flag PH is set to "0" (step CS319) and the command passes then at step CS323. If the time of the energy maintenance timer has not elapsed (if the answer is NO at step CS317), the energy maintenance flag PH is set to "1" (step CS321) and the command then goes to step CS323. The energy maintenance timer measures the time from the moment when the photometric switch SWS is open until the time when the CPU 111 of the unit enters a standby mode, and the energy maintenance flag PH to "1" or "0" indicates that the device housing is in operation or is in a mode

  standby (power saving mode), respectively.

  In step CS323, it is determined whether the main switch SWMAIN is closed. If the main SWMAIN switch is closed (if the answer is YES in step CS323), the SWMAIN flag is set to "1" (step CS325), and the command then performs a return. If the main SWMAIN switch is not closed (if the answer is NO at step CS323), the SWMAIN flag is set to "0"

  (step CS327), and the command then performs a return.

  [Communication of a new type (communication with the CPU CPU of the lens)] Diagrams of the times of the communication of a new type between the CPU 211 of the lens and the CPU 111 of the housing are shown in Figures 18, 19A, 19B, 21A and 21B. In the communication of a new type, the fifth contacts 104e and 204e (Fmaxl / Inverse-FBL) and the sixth contacts 104f and 204f (Fmax2 / InverseFLB) are used as connectors / lines of establishment of connection protocol ( see Figures l9A and l9B). The

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  level of each of the fifth contact 104th (Fmaxl / Inverse-

  FBL) and the sixth contact 104f (Fmax2 / Inverse-FLB) is raised by the CPU 111 of the housing so that the fifth contact 104e (Fmaxl / Inverse-FBL) and the sixth contact 104f (Fmax2 / Inverse-FLB) cannot short-circuit when the new type of photographic lens 200 is mounted on the housing 100 of

  the device or is removed from it (see Figures l9A and l9B).

  [New Type IO Communication Establishment Request Process] The new type communication establishment request process performed in step CS105 will be described in detail below with reference to

  the flowchart shown in Figure 9.

  In the process of requesting the establishment of a new type of communication, it is first determined whether the flag of a new type is "1", that is to say if the photographic objective 200 currently mounted on the housing 100 of the camera is a photographic lens of a new type (step CS221). If the flag of a new type is not "1" (if the answer is NO at step CS221), the command returns because the photographic objective 200 then mounted is not a photographic objective d 'a new guy. If the flag of a new type is "1" (if the answer is YES in step CS221), operations carried out in step CS223 and after this step in the process of requesting establishment of communication of a new type are executed because the photographic lens 200 then mounted on the housing 100 of the device is a photographic lens 200 of a new type which allows communication of a new type. In step CS223, it is determined whether the second energy flag VpzONCPU is "1". If the second energy flag VpzONCPU is at "1" (if the answer is YES at step CS223), the energy contact 105 (VPZ) is closed or

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  energized, that is to say that energy is supplied to the energy contact 105 (VPZ) (step CS225). Then, the command passes to a step CS227. On the other hand, if the second energy flag VpzONCPU is not at "1" (if the answer is NO at step CS223), the command skips step CS225 to go directly from step CS221 to step CS227, so that no energy is supplied to the contact

energy 105 (VPZ).

  At step CS227, the level of the fifth contact 104e (Fmaxl / Inverse-FBL) is caused to fall to a low level, and it is then determined whether the level of the sixth contact

  104f (Fmax2 / Inverse-FLB) is a low level (step CS229).

  The operation performed in step CS229 is repeated as long as the level of the sixth contact 104f (Fmax2 / Inverse-FLB) is a high level. If it is determined in step CS229 that the level of the sixth contact 104f (Fmax2 / Inverse-FLB) is a low level (if the answer is YES in step CS229), the level of the fifth contact 104e (Fmaxl / Reverse-FBL) is raised to a high level (step CS231), and it is then determined whether the level of the sixth contact 104f

  (Fmax2 / Inverse-FLB) is a high level (step CS233).

  The operation performed in step CS233 is repeated as long as the level of the sixth contact 104f (Fmax2 / Inverse-FLB) is a low level. If it is determined in step CS233 that the 2nd level of the sixth contact 104f (Fmax2 / Inverse-FLB) is a high level (if the answer is YES in step CS233), the command performs a return, this that is to say that the command

go to step CS107.

  [Image shake compensation data establishment process] The image shake compensation data establishment process, which is performed in step CS137 provided that the photographic lens 200 mounted on the body 100 of the apparatus, either of a type which includes an image-shake compensation device, will be described in detail below with reference to

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  the flowchart shown in Figure 11. Figure 12A shows basic elements of a control system for one embodiment (first embodiment) of the photographic lens 200 which includes a camera shake compensation device. picture. FIG. 12B shows a conceptual diagram of a compensation lens (optical image stabilization system) LC of the image shake compensation device. The image shake compensation device comprises a pair of sensors, i.e. an angular speed sensor of direction X (horizontal vibration sensor) 251 and an angular speed sensor of direction Y (vibration sensor) vertical) 252, intended to determine the amplitude and the direction of the vibration of the objective

  photographic 200 under the effect of a movement of the hands.

  If a state in which the photographic objective 200 is suitably is suitably mounted on the housing 100 of the camera and is normally maintained in a horizontal position is considered as a reference state, the angular speed sensor 251 of direction X captures the angular speed of the photographic objective 200 in the horizontal direction of its optical axis (in the X direction around the Y axis), while the angular velocity sensor of direction Y captures the angular speed of the photographic objective 200 in the horizontal direction of its optical axis (in the Y direction around the X axis), a point of intersection of the optical axis of the photographic lens 200 and the image plane defining the plane of intersection of the X axis and Y axis. Each of the vertical and horizontal vibration sensors can be a conventional gyro sensor. The vertical vibration sensor exclusively captures the camera shake 200 in the vertical direction, while the horizontal vibration sensor exclusively captures the camera shake 3s 200 in the horizontal direction.

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  The image shake compensation device of the photographic objective 200 is provided with the LC compensation lens (see FIG. 12B), and operates so as to compensate for the shake of the image of the object on the image plane in driving the compensation lens LC in the X direction and in the Y direction using an X 254 motor (lens drive) and a Y 257 motor (lens drive), respectively , in a plane perpendicular to the optical axis of the photographic objective 200. The position of the LC compensation lens is captured by the number

  of pulses delivered at the output of each of a photo-

  switch 255 of direction X and a photo-switch 258 of direction Y when the LC compensation lens is driven, a position in which the optical axis of the LC compensation lens coincides with the optical axis of the photographic lens 200 being considered as a reference position. The rotation of each of the motor X 254 and of the motor Y 257 is controlled by the unit CPU 211 of the objective via a circuit 253 for driving the motor X and a cTrcuit 256 for driving the motor Y. respectively. It should be noted that the angular speed sensor 251 of direction X, the angular speed sensor 252 2s of direction Y. the drive circuit 253 of the motor X, the drive circuit 256 of the motor Y. the motor X 254 , the motor Y 257, the photo-switch 255 of directon X, the photo-switch 258 of direction Y and the compensation lens LC together constitute the device for

image shake compensation.

  The lens unit CPU 211 serves as a control device and an arithmetic processing unit for the image shake compensation device. The lens unit CPU 211 starts operating immediately after closing the image shake compensation switch SW1 to determine the direction of the lens

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  compensation lens LC and the amplitude of its movement (its speed) to drive the motor X 254 and the motor Y 257. In the process of establishing image shake compensation data shown in FIG. 11, it is first determined if the SWMAIN main switch flag has changed from "0 to" 1 "(step CS401). If the SWMAIN main switch flag has changed from" 0 "to" 1 "(if the response is YES in step CS401), an order 70 is transmitted to the photographic objective 200 so that data is required (step CS403). Then, the unit CPU 211 of the objective waits for an initialization flag Init at "0" is transmitted from the unit 100 of the device (step CS405). In other words, it is determined at step CS405 if the initialization flag Init is at

l, O lT.

  The command returns to step CS3403 if the initialization flag Init is not at "0". The initialization flag Init changes from "1" to "0" and is delivered from the photographic objective 200 to the housing 100 of the camera when an operation is carried out in a step LS117 or LS125, in which the compensation lens LC is driven so as to return to its initial position in which the optical axis of the compensation lens coincides with the optical axis of the photographic objective 200, is completed. If it is determined in state CS405 that the initialization flag Init is at "0", the control passes to a step CS407. If it is determined in step CS401 that the main switch flag SWMAIN has not gone from "0" to "1" (if the answer is NO in step CS401), the

  command goes directly from step CS401 to CS407.

  In step CS407, it is determined whether the flag of the main switch SWMAIN has gone from "1" to "0". If the flag of the main SWMAIN switch went from "1" to "0" (if the answer is YES in step CS407), this means that the main switch SWMAIN went from

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  the closed state to the open state, so that a next order is transmitted to the photographic objective 200 so that data is required (step CS409). Then, the unit CPU 211 of the objective waits for the initialization flag Init to "0" to be transmitted from the housing of the apparatus (step CS411). In other words, it is determined in step CS411 if the initialization flag Init is at "0". The command returns to step CS409 if the

  Init initialization flag is not "0".

  If it is determined in step CS411 that the initialization flag Init is at "0", the control passes to a step CS413. If it is determined in step CS407 that the flag of the main switch SWMAIN has not gone from "1" to À01 '(if the answer is NO in step CS407), the command passes directly from l 'step CS407 to step

CS413.

  If it is determined in step CS413 that the energy maintenance flag PH has gone from "1" to "0" (if the answer is YES in step CS413), an order 70 is transmitted to the photographic objective 200 so that data is received from it (step CS415). Then, the unit CPU 211 of the objective waits for the initialization flag Init to "0" to be transmitted from the housing 100 of the apparatus (step CS417). In other words, it is determined in step 2s CS417 if the initialization flag Init is at "0". The command returns to step CS415 if the initialization flag Init is not "0". If it is determined in step CS417 that the initialization flag Init is at "0", the command passes to a step CS419. If it is determined in step CS413 that the energy maintenance flag PH has not changed from "1" to "0" (if the answer is NO in step CS413), the command passes directly from

step CS413 to step CS419.

  At step CS419, it is determined whether the image shake compensation switch SW1 has gone from the closed state to the open state. If the switch SW1 of

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  shake compensation went from closed to open state (if the answer is YES in step CS419), a D1 command to stop the shake compensation function of the photographic lens 200 is transmitted to this one (step CS421), and the command then passes to a step CS423. On receipt of the order D1, the photographic lens 200 completes the image shake compensation operation. If the image shake compensation switch SW1 has not gone from the closed state to the open state (if the answer is NO at step CS419), the command skips step CS421 to go directly from step CS419 to step CS423. In step CS423, it is determined whether the image shake compensation switch SW1 has gone from the open state to the closed state. If the image shake compensation switch SW1 has gone from the open state to the closed state (if the answer is YES at step CS423), a command D2 to activate the shake compensation function image of the photographic objective is transmitted to it (step CS425), and the command then performs a return. If the image shake compensation switch SW1 has not passed from the open state to the closed state (if the answer is NO at step CS423), the command skips step CS425 and performs a return. Upon receipt of the order D2, the photographic 2s objective 200 begins the operation of compensation for

image shake.

  There will be described below in detail the basic operations and processes executed by the CPU 211 of the photographic objective 200 which includes the image shake compensation device, with reference to the flowcharts shown in FIGS. 13 to 17. Fig. 13 shows a flow diagram of the main process for the photographic lens 200 which is executed by the CPU 211 of the lens. The control enters the main process immediately after the objective's CPU 211 has been supplied with energy by the operation

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  performed at step CS225, at which energy is

  supplied to energy contact 105 (VPZ).

  In the main process shown in fig 13, the CPU 211 of the lens first initializes its internal RAM memory and its accesses (step LS101). Next, a new type communication establishment process ("new type communication establishment process" shown in Fig. 14) is executed (step LS103). In this process, a 1 ms timer interrupt (see figure 15) and an interrupt via the INT (reverse) access of the lens CPU 211 (see figure 16), are validated for the reception of an interruption from the housing 100 of the apparatus in order to make possible the communication of a new type between the photographic lens of a new type (photographic objective 200) and the boltier 100 of the apparatus. Next, it is determined whether a standby flag, which is set to "1" in step LS433 or LS437, is "1" (step LS105). If the standby flag is "1" (if the answer is YES in step LS105), the unit CPU 211 of the lens stops (prevents) the operations carried out by the internal devices of the photographic lens 200, such as the action of the AF motor 261, the electrically controlled zoom motor 264 or the image-shake compensation motors (motor X 254 and motor Y 257) (step LS107), the standby flag is set to "0 "(step LS109), and the CPU 211 of the lens goes into standby mode (step LS111). Objective CPU 211 "wakes up" when an interrupt signal is received through

of its access (reverse) INT.

  If it is determined in step CS105 that the standby flag is not at "1" (if the answer is NO in step LS105), it is determined whether a flag for repositioning the compensation lens is to "1" (step LS113). If the lens repositioning flag

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  compensation is at "1" (if the answer is YES in step LS113), the initialization flag Init is set to "1" (step LS115). Then, a repositioning operation is executed (step LS117). In the repositioning operation, the motor X 254 and the motor Y 257 are driven so as to move the compensation lens LC first to a predetermined mechanical end (a reference point) within the range of movement of the LC compensation lens, and then to its initial position (central position) in which the optical axis of the LC compensation lens coincides with the optical axis of the photographic lens 200. After the repositioning operation has been carried out, the repositioning flag of the compensation lens and the initialization flag are set to "0" (step LS119), and the command passes to a step LS121. In accordance with this repositioning operation, the absolute position of the LC compensation lens is ensured and, therefore, the LC compensation lens can be precisely positioned

  in its initial position (central position).

  If it is determined in step LS113 that the repositioning flag of the compensation lens is not at "1", it is determined if a centering flag of the 2s compensation lens is at "1" (step LS121). If the centering flag of the compensation lens is not "1" (if the answer is NO in step LS121), control returns to step LS105. If the centering flag of the compensation lens is "1" (if the answer is YES in step LS121), the initialization flag Init is set to "1" (step LS123). Next, a centering operation is carried out during which the motor X 254 and the motor Y 257 are driven so as to bring the compensation lens LC into the initial position (central position) in which the optical axis of the lens LC compensation coincides with the optical axis of

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  the photographic objective 200 (step LS125). Then, the centering flag of the compensation lens and the initialization flag are set to "0" (step

  LS127) and control returns to step LS105.

  The process of establishing communication of a new type executed in step LS103 will be described below in detail with reference to the flowchart shown in FIG. 14. In the process of establishing communication of a new type, it is first determined whether the level of the fifth contact 204e (Fmaxl / Inverse-FBL) is a low level (step LS221). If the level of the fifth contact 204e (Fmaxl / Inverse-FBL) is not a low level (if the answer is NO in step LS221), the operation carried out in step LS221 is performed again, so that the operation of step LS221 is repeated until

  what the level of the fifth contact 209th (Fmaxl / Inverse-

  FBL) drops to a low level. If the level of the fifth contact 204e (Fmaxl / Inverse-FBL) is a low level (if the answer is YES at step LS221), the sixth contact 204f (Fmax2 / Inverse-FLB) is caused to fall to a low level (step LS223) and, subsequently, a communication establishment process is executed (step LS225). The communication establishment process includes a establishment process for serial communication, and a 2s process of enabling validation through

  from the INT (reverse) access of the CPU 221 of the lens.

  After the completion of the communication establishment process in step LS225, it is determined whether the level of the fifth contact 204e (Fmaxl / Inverse-FBL) is a high level (step LS227). If the level of the fifth contact 204e (Fmaxl / Inverse-FBL) is not a high level (if the answer is NO in step LS227), the operation carried out in step LS227 is executed again, so that the operation of step LS227 is repeated until the level of the fifth contact 204e (Fmaxl / Inverse-FBL) rises to a high level. If the level of the fifth contact

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  204e (Fmaxl / Inverse-FBL) is a high level (if the answer is YES in step LS227), the sixth contact 204f (Fmax2 / Inverse-FLB) is raised to a high level (step

  LS229), and the command then returns.

  A 1 ms delay interrupt process for the shake compensation operation will be described below in detail with reference to the flowchart shown in Fig. 15. The 1 ms delay interrupt process begins each time a 1 ms hardware timer expires while the CPU 211 of the lens is operating. In the interrupt process with 1 ms delay, the CPU 211 of the objective receives an angular speed signal as input from each of the angular speed sensor 251 of direction X and of angular speed sensor 252 of direction Y in order to detect the vibration of the photographic objective 200 following a movement of the hands, and it then determines the direction of drive of the compensation lens LC and the amplitude of its movement (its speed) to attack the motor X 254 and the motor Y 257 in order to move the LC compensation lens by the determined amplitude of movement in the direction

determined training.

  In the interrupt process with a time delay of 2s 1 ms, it is first determined whether a flag OFF compensation function is at "1" (step LS301). If the OFF compensation function flag is at "1" (if the answer is YES in step LS301), a compensation working flag is set to "0" (step LS303) and the command returns. The compensation work flag at "1" or "0" indicates that the shake compensation device is in operation or is not in operation, respectively. If the OFF compensation flag is at "0" (if the answer is NO at step LS301), it is determined whether an ON compensation flag is at "0" (step LS305). Yes

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  the EN compensation flag is "0" (if the answer is YES in step LS305), this means that the shake compensation operation is not executed, so that the compensation work flag is set to "0" (step LS303), and the command returns. If the EN compensation flag is set to "1" (if the answer is NO in step LS305), the compensation work flag is set to "1" and then a vibration detection process is executed (step LS309 ). In the vibration detection process, the objective CPU receives an angular speed signal as input from each of the angular speed X direction sensor 251 and the angular speed Y direction sensor 252 in order to detect the vibration of the photographic objective 200, and it then determines the driving direction of the LC compensation lens and

the amplitude of its movement.

  After the vibration detection process in step LS309 is executed, it is determined whether an attacked EN flag is "0" (step LS311). If the flag EN attack is not at "0" (if the answer is NO at step LS311), the motor X 254 and the motor Y 257 are attacked so as to move the compensation lens LC by the amplitude movement in the determined driving direction 2s which are determined in step LS309 (step LS315), and the control then performs a return. If the flag IN attack is at "0" (if the answer is YES in step LS311), the attack on each of the engine X 254 and of the engine Y 257 is stopped in an obligatory manner (step LS313) and

the command returns.

  A reverse-INT interrupt process will be described below with reference to the flowchart shown in Figures 16 and 17. The reverse-INT interrupt process begins immediately after the level of the fifth contact 204e (Fmaxl / Inverse- FBL) fell to a low level to make access (reverse) fall to a low level

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  INT of the CPU 211 of the lens.

  In the reverse-INT interrupt process, at least one command is first received from the housing 100 of the camera via communication of a new type (step LS401). Then, it is determined whether at least one of the orders 70, 71 and 72 has been requested in step LS401 (step LS403). If at least one of orders 70, 71 and 72 has been received in step LS401 (if the answer is YES in step LS403), a process for transmitting objective data (process for transmitting data to 8 bits) is executed via the communication of a new type (step LS405), and the command passes to a step LS407. If none of the orders 70, 71 and 72 have been requested in step LS401 (if the answer is NO in step LS403), the command goes directly from step LS403 to step

LS407.

  In step LS407, it is determined whether at least one of the orders B0 and B1 has been received in step LS401. If none of the orders B0 and B1 have been received in step LS401 (if the answer is NO in step LS407), the control process goes to step LS431. If at least one of the orders B0 and B1 has been received in step LS401 (if the answer is YES in step LS407), a housing data reception process is executed by means of communication d 'a new type (step LS409). Then it is determined whether the flag of the main SWMAIN switch has gone from "0" to "1" (step LS411), if the flag of the main SWMAIN switch has gone from "1" to "0" (step LS415), if the PH energy maintenance flag is set to "1" (step LS919) and if the PH energy maintenance flag has changed from "1"

to "0" (step LS423).

  If it is determined in step LS411 that the flag of the main switch SWMAIN has gone from "0" to "1" (if the answer is YES in step LS411), the repositioning flag of the lens compensation is set to "1" (step LS413), and control passes to

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  step LS415. If it is determined in step LS415 that the flag of the main switch SWMAIN has gone from "1" to "0" (if the answer is YES in step LS415), the centering flag of the lens compensation is set to "1" (step LS417), and control proceeds to step LS419. If it is determined at step LS419 that the PH energy maintenance flag is at "1" (if the answer is YES at step LS419), the EN compensation flag is set to

  "1" (step LS421), and control proceeds to step LS423.

  If it is determined in step LS423 that the energy maintenance flag PH has gone from "1" to "0" (if the answer is YES in step LS423), the flag EN compensation is set to " 0 "and the centering flag of the compensation lens is set to" 1 "(step LS424) and the command goes to a step LS425. If it is determined that the answer is "NO" at all the steps LS411, LS415, LS419 and LS423, the command passes from step LS411 to step LS425 without any of the operations of steps LS413,

  LS417, LS421 and LS424 will not be performed.

  In step LS425, it is determined whether the PAUSE flag is "1". If the PAUSE flag is at "1" (if the answer is YES in step LS425), the flag IN attack is set

  to "0" (step LS427) and the command goes to step LS431.

  If the PAUSE flag is at "0" (if the answer is NO in step LS425), the flag IN attack is set to "1" (step LS429), and control proceeds to step LS431. The PAUSE flag is set to "1" when any high energy operation, which requires intense current, is in progress. In the present embodiment of the SLR camera system, the PAUSE flag is set to "1" when the electronic flash is being charged (step CS311). Then, the unit CPU 211 of the objective sets to "0" the flag EN attacks on reception of the flag PAUSE to "1" (step LS427), and the control passes from step LS311 to step LS313 for must stop the attack on each of the

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  motor X 254 and motor Y 257 in the 1 ms time delay interrupt process shown in Figure 15. However, the angular direction X speed sensor 251 and the angular direction Y direction sensor 252 continue to operate. It is determined in step LS431 if at least one of the orders 71 and B1 has been received in step LS401. If at least one of orders 71 and B1 has been received in step LS401 (if the answer is YES in step LS431), the standby flag is set to "1" (step LS433) and the command passes at one step LS435. If none of the orders 71 and B1 have been received in step LS401 (if the answer is NO in step LS431), the command passes from step LS431 to step LS435. If the standby flag is set to "1", control proceeds from step LS105 to step LS107 so that the CPV unit 211 of the lens enters the standby mode in the

  main process shown in Figure 13.

  In step LS435, it is determined whether the order D0 has been requested in step LS401. If the order D0 has been requested in step LS401 (if the answer is YES in step LS435), the standby flag is set to "1" (step LS437) and the command passes to a step LS439. If the order D0 was not received in step LS401 (if the answer is NO in step LS435), the command goes directly from step LS435 to step

LS439.

  In step LS439, it is determined whether a command D1 has been requested in step LS401. If an order D1 has been received in step LS401 (if the answer is YES in step LS439), the flag OFF compensation function is set to "1" (step LS441) and the command goes to step LS443. If no D1 order was received in step LS401 (if the answer is NO in step LS439), the command goes directly from

step LS439 to step LS443.

  In step LS443, it is determined whether a command D2 has been requested in step LS401. If a D2 command was received in step LS401 (if the answer is YES in step LS443), the flag

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  OFF compensation function is set to "0" (step LS445) and the command goes to step LS447. If no D2 command was requested in step LS401 (if the answer is NO in step LS443), the command goes directly from step LS443 to step LS447. In step LS447, it is determined whether an order has been requested in step LS401. If an order 7F has been received in step LS401 (if the answer is YES in step LS447), the unit CPU 211 of the lens performs a data reception process (process of communication of fictitious data) ( step LS449) and the command returns. If no 7F order was received in step LS401 (if the response is

  NO in step LS447), the command returns.

  The basic structures and processes of an embodiment of the photographic lens 200 which includes an image shake compensation device have been described above. Another embodiment (second embodiment) of the photographic lens 200 which includes an automatic focusing (AF) system of the lens will be described below with reference to Figures 22 to 26. It should be noted that elements and processes of the second embodiment of the photographic objective 200 which are similar to those of the first embodiment of the photographic objective 200 shown in Figures 12 to 17 are designated, respectively, by reference numerals

  similar and similar step numbers.

  Fig. 22 is a simplified block diagram of basic elements of a communication / control system of the second embodiment of the photographic lens which includes a lens AF focusing system. The second embodiment of the photographic objective 200 is provided with an AF motor drive circuit 261, with an AF autofocus motor.

  (lens motor) 262 and a photo interrupter 263.

  The CPU 211 of the lens attacks the AF 262 engine by

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  via the AF motor drive circuit 261 in accordance with data relating to the AF motor drive amplitude 262 and its direction of attack, which data is required from the CPU 111 of the housing to move a group Lf focusing lenses along its optical axis to an axial position thereon, in which a state in focus is obtained. The amplitude of the movement of the group Lf of focusing lenses is detected by counting the number of pulses delivered in

output from photo-switch 263.

  Fig. 23 shows a flow diagram of the main process executed in the second embodiment of the photographic lens 200 which includes an AF autofocus system. The control addresses the main process immediately after the CPU 211 of the lens has been supplied with power by means of the effectuce operation in step CS225, in which

  energy is supplied to energy contact 105 (VPZ).

  In the main process shown in FIG. 23, the unit CPU 211 of the objective first initializes its internal RAM memory and its accesses (step LS101). Then, the new type communication establishment process ("new type communication establishment process" shown in Fig. 14) is executed (step LS103). In this process, a 1 ms delay interrupt (see figure 24) and an interrupt via the INT (reverse) access of the CPU 211 of the lens (see figure 25) are enabled to receive an interruption from the housing 100 of the camera to thereby make possible a new type of communication between the photographic lens 200 and the housing 100

of the device.

  Next, it is determined whether a standby flag, which is set to "1" in step LS433 or LS437, is "1" (step LS105). If the standby flag is "1" (if the answer is YES in step LS105), the CPU 211 of

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  the lens turns off the lens inner devices

  photographic 200 such as the AF 262 engine and the photo-

  switch 263 (step LS107), the standby flag is set to "0" (step LS109), and the unit CPU 211 of the lens goes into standby mode (step LS111). The CPU 211 of the lens wakes up to the reception of an interrupt signal via its access

(reverse) INT.

  If it is determined in step LS105 that the standby flag is not at "1" (if the answer is NO in step

  LS105), the operation performed in step LS105 is repeated.

  The new type of communication establishment process shown in Figure 14, a 1 ms timeout interrupt process shown in Figure 24 and a reverse INT-interrupt process shown in the figure are executed during the repetition time of

the operation in step LS105.

  The process of establishing a new type of communication carried out in step LS103 shown in FIG. 23 is identical to that shown in FIG. 14 and, therefore, the process of establishing communication is not described in more detail. new type communication made

  in step LS103 shown in Figure 23.

  The interrupt process with a time delay of 1 ms, 2 s which is repeated at regular intervals when the CPU 211 of the lens is in operation, in the second embodiment of the photographic lens 200, will be described below with reference to the flowchart shown in Figure 24. This interrupt process with 1 ms delay starts each time a 1 ms hardware delay expires during the operation of the CPU 211 of the lens to control the operation of the AF motor 262. In the interruption process with 1 ms delay, it is first determined whether an EN flag AF function is at "0" (step LS331). If the flag AF function is at

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  1097 (if the answer is YES in step LS331), an AF automatic focusing process for the lens is not executed, an AF working flag then being set to "0" (step LS333), and the command returns. The AF work flag at "1" or "0" indicates that the lens AF process is running or not

operation, respectively.

  If the flag AF function is not at "0" (if the answer is NO at step LS331), it is determined whether an end of attack flag is at "1" (step LS335). If the end of attack flag is at "1" (if the answer is YES in step LS335), this means that the attack of the AF motor 262 is complete, so that the AF working flag is set to "0" (step LS333) and the command performs a

return.

  If the end of attack flag is not at "1" (if the answer is NO at step LS335), it is determined whether an attack EN flag is at "0" (step LS337). If the flag IN attack is at "0" (if the answer is YES in step LS337), the AF engine 262 must be stopped (step

  LS339) and the command returns.

  If the flag IN attack is not "0" (if the answer is NO in step LS337), the working flag AF is set to "1" (step LS341), and then the AF engine 343 is started (attacked) (step LS343). Next, it is determined whether the attack on the AF motor 343 is complete (step LS345). If the attack on the AF motor 343 is complete (if the answer is YES in step LS345), the end of attack flag is set to "1" (step LS347) and the command returns. If the attack on the AF motor 343 is not complete (if the answer is NO in step LS345), the

command returns.

  A reverse-INT interrupt process in the second embodiment of the photographic objective 200 will be described below with reference to the flowchart shown in Figures 25 and 26. The process

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  of interrupt-INT interrupt begins immediately after the level of the fifth contact 204e (Fmaxl / Inverse-FBL) has dropped to a low level thereby bringing the (reverse) INT access of the CPU 211 of the lens to fall to a low level. In the reverse-INT interrupt process, at least one order is first received from the housing 100 of the camera via communication of a new type (step LS401). Then, it is determined whether at least one of the orders 70, 71 and 72 has been received in step LS401 (step LS403). If at least one of the orders 70, 71 and 72 has been received in step LS401 (if the answer is YES in step LS403), a process for transmitting objective data (process for transmitting data to 8 bits) is executed via the communication of a new type, and the command passes to a step LS407. If none of the orders, 71 and 72 were received in step LS401 (if the answer is NO in step LS403), the command goes directly from

step LS403 to step LS407.

  In step LS407, it is determined whether at least one of the orders B0 and B1 has been received in step LS401. If none of the orders B0 and B1 have been received in step LS401 (if the answer is NO in step LS407), the command proceeds to a step LS461. If at least one of the orders B0 and B1 has been received in step LS401 (if the answer is YES in step LS407), a process for receiving data from the unit is executed via the communication d 'a new type (step LS409). Then, it is determined whether the flag EN AF is at "1" (step LS451). If the flag IN AF is at "1" (if the answer is YES in step LS451), the flag IN function AF is set to "1" (step LS453) and the command passes to a step LS455. If the EN AF flag is not at "1" (if the answer is NO at step LS451), the EN AF function flag is set to "0" (step LS454)

  and control proceeds to step LS455.

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  In step LS455, it is determined whether the triggering phase indicator RLS is at "2". The trigger phase indicator RLS is a two-bit datum which is set to "0", "1", "2" or "3" by the CPU 111 of the housing. The RLS trigger phase indicator "1" indicates a phase in which the quick return mirror moves to its retracted position after

  the SWR trip switch has been closed.

  The RLS trigger phase indicator "2" indicates a phase in which an image of a film is being exposed after the rapid return mirror is raised to its retracted position. The trigger phase indicator RLS "3" indicates a phase in which the housing 100 of the camera is in a phase in which the film is advanced after the exposure operation has been completed. The RLS trigger phase indicator

  "0" indicates any other phase of the unit 100 of the device.

  If the RLS trigger phase indicator is "2" (if the answer is YES in step LS455), this means that an image of a film is being exposed after the fast-return mirror has been raised to its retracted position, so that the attacking EN flag is set to "0" (step LS457) and control proceeds to step LS461. If the trigger phase indicator RLS is not at "2" (sl the answer is NO at step LS455), the flag IN attack is set to "1" (step LS459) and the

command goes to step LS461.

  In step LS461, it is determined whether a B2 order has been requested in step LS401. If an order B2 has been received in step LS401 (if the answer is YES in step LS461), a data item for the target attack amplitude is received from the unit CPU 111 of the housing (step LS463 ). Then, this data received from the target's attack amplitude is set (step LS465), and the end of attack flag is set to "0" (step LS467). The command then goes to step LS431. If no B2 order was received at step

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  LS401 (if the answer is NO in step LS461), the command

go to step LS431.

* It is determined in step LS431 if at least one of orders 71 and B1 has been requested in step LS401. If at least s one of orders 71 and B1 has been received in step LS401 (if the answer is YES in step LS431), the standby flag is set to "1" (step LS433) and the command go to step LS435. If none of the orders 71 and B1 have been requested in step LS401 (if the answer is NO in step LS431), the command passes from step LS431 to step LS435. If the standby flag is set to "1", control proceeds from step LS105 to step LS107, in the main process shown in Figure 13, so that the unit

  Objective CPU 211 enters standby mode.

  In step LS45, it is determined whether an order D0 has been received in step LS401. If an order D0 has been received in step LS401 (if the answer is YES in step LS435), the standby flag is set to "1" (step LS437) and the control passes to a step LS469. If no D0 order was received in step LS401 (if the answer is NO in step LS435), the command goes directly from step LS435 to step

LS469.

  In step LS469, it is determined whether a command D3 has been received in step LS401. If an order D3 has been received in step LS401 (if the answer is YES in step LS469), the flag IN attack is set to "0" (step LS471) and the command passes to a step LS473. If no D3 order was received in step LS401 (if the answer is NO in step LS469), the command goes directly from step LS469 to

step LS473.

  In step LS473, it is determined whether a command D4 has been received in step LS401. If an order D4 has been received in step LS401 (if the answer is YES in step LS473), the flag IN attack is set to "1" (step LS475) and the command passes to a step LS477. If no D4 command was received in step LS401 (if the answer is NO in step

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  LS473), the command goes directly from step LS473 to

step LS477.

  In step LS477, it is determined whether an order 7F has been requested in step LS401. If an order 7F was received in step LS401 (if the answer is YES in step LS447), the unit CPU 211 of the objective executes a process of receiving data (process of communication of fictitious data) ( step LS479), and the command returns. If no 7F command was not requested in step LS401 (if the response

  is NO in step LS477), the command returns.

  As can be understood from the descriptions

  above, in accordance with the present embodiment of an SLR camera system to which the invention is applied, when the photographic lens 200 mounted on the camera body 100 is a new type of camera photographic lens, the camera body first supplies the first energy, to attack low-energy elements, to the photographic lens 200 in order to attack the ROM memory 221 of the lens for data entry lens, and the housing 100 of the camera can then supply the second energy, whose capacity is significantly greater than that of the first energy, to the photographic lens in order to attack the CPU 211 of the lens and its peripheral elements. This increases the degree of freedom in the choice of CPU units and electronic devices that can be used for the SLR camera system. In addition, the photographic objective 200 is produced so as to operate with a low energy when the housing 100 of the apparatus performs an operation which requires an intense current. This makes it possible to incorporate high energy components such as a lens motor and an image shake compensation device into the photographic lens 200, and therefore allows operation

  suitably these high energy components.

To 28 211 71

  In addition, even if the photographic lens 200 mounted on a conventional camera housing is not a photographic lens of a new type, which cannot effect the communication of a new type between the housing of the camera and the photographic lens 200, at least the communication of an old type (the communication with the ROM memory of the lens) can be carried out between the housing of the camera and the photographic lens 200

  via lens ROM 221.

  Therefore, the photographic lens 200 can be used as a conventional interchangeable lens which includes a lens ROM memory, which therefore maintains compatibility with conventional camera housings although additional functions are provided. of the photographic lens 200, such as a camera shake compensation function, cannot be

  used with conventional device housings.

  In addition, the camera controller provides the first energy to the photographic lens to attack the lens memory to extract lens data therefrom when the photographic lens is mounted on the camera body , and then deactivates the memory of the objective and supplies the second energy to the objective control device so that the device control device 2s and the objective control device communicate with each other if the control device of the housing determines, from the lens data retrieved from the lens memory, that the photographic lens includes a lens controller. Therefore, the photographic lens can include not only the lens memory which operates with the first energy, but also the lens controller which operates with the second energy. In addition, the degree of freedom in the choice of CPU units and electronic devices that can be used for the system

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  SLR camera is increased, lens design becomes easy, and a photographic lens

  interchangeable with multiple functions can be obtained.

  IT goes without saying that many modifications can be made to the camera system, the boat and the lens described and represented without leaving

of the scope of the invention.

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Claims (13)

  1. Camera system, characterized in that it comprises a photographic objective (200) comprising at least one of a memory (221) of objective, in which data relating to the photographic objective are stored, and a lens control device (211) which controls operations performed by the photographic lens i and a camera housing (100) comprising a camera control device (111) that can communicate with at least one of the memory of the objective and of the device for controlling the objective i, a first energy which can be supplied to the photographic objective i and a second energy which can be supplied to the photographic objective i the photographic lens can be mounted on and removed from the camera body, the lens memory and the lens control device operating with the first energy and the second energy, respectively, when the lens photog raphique is mounted on the camera body, and the camera controller provides the first energy to the photographic lens to attack the lens memory to extract lens data when the photographic lens is mounted on the camera body, and then disabling the lens memory and providing second energy to the lens controller so that the camera controller and the camera controller lens communicate with each other in case the camera controller determines from the lens data extracted from the lens memory that the photographic lens   includes the lens control device.   2. System according to claim 1, characterized in that the housing of the apparatus comprises a line (104) of housing communication, a first line of housing energy and a second line (105) of housing energy i 28211 71   the photographic lens comprises a lens communication line (204), a first lens energy line and a second lens energy line (205) which are connected, respectively, to the communication line of the body, to the first power line of the body and to the second energy line of the body when the photographic lens is mounted on the camera body, the camera body and the photographic lens communicating with each other via the communication line of the housing and the communication line of the lens, the housing of the camera supplying the first energy to the photographic objective passing through the first energy line of the housing and the first energy line of the lens, and the IS camera body providing the second energy to the photographic lens through the second energy line of the camera body and the   second objective energy line.   3. System according to claim 1, characterized in that the control device of the housing comprises a control line intended to change a state of the memory of   the objective between a validated state and an invalidated state.   4. System according to claim 2, characterized in that the housing of the device transmits a first order, to switch the lens control device in a standby mode, to the lens control device while passing by the communication line of the housing and the communication line of the objective, the objective control device going into a standby mode on reception of the first order i and the housing of the apparatus transmits a second order, to bring the lens control device out of standby mode, to the lens control device via the communication line of the housing and the communication line of the lens, the lens control device waking up from sleep mode on receipt of second order. 28211 71   5. System according to claim 1, characterized in that the capacity of the second energy is substantially   greater than the capacity of the first energy.   6. Camera housing on which a photographic lens (200) can be mounted and from which it can be removed, the photographic lens having at least one of a lens memory (221), in which data relating to the photographic lens are stored, and a lens control device (211) which controls operations performed by the photographic lens, the camera body being characterized in that it comprises a device (111) for controlling the housing which can communicate with at least one of the memory of the lens and of the device for controlling the lens i, a first energy which can be supplied to the photographic lens; and a second energy that can be supplied to the photographic lens, the lens memory and the lens controller operating with the first energy and the second energy, respectively, when the photographic lens is mounted on the housing of the camera, and the camera control device supplying the first energy to the photographic lens to drive the lens memory in order to extract the lens data from this lens memory when the photographic lens is mounted on the camera body, and then disabling the lens memory and providing second energy to the lens controller so that the camera controller and the lens controller communicate between them in the case where the camera control device determines, from the lens data extracted from the lens memory, that the photographic lens comprises the device lens control.   7. Device housing according to claim 6, characterized in that it comprises a line (104) of - 28211 71   communication of the housing, a first line of energy of the housing and a second line (105) of energy of the housing; in that the photographic lens has a lens communication line (204), a first lens energy line and a second lens energy line (205) which are connected, respectively, to the line of communication from the housing, to the first line of energy of the housing and to the second line of energy of the housing, when the photographic lens is mounted on the camera housing, the camera housing and the lens photographic communicating with each other by the communication line of the housing and the communication line of the lens, the housing of the camera supplying the first energy to the photographic objective passing through the first energy line of the housing and the first lens power line, and the camera body providing the second energy to the photographic lens through the second camera power line and the   second objective energy line.   8. Camera housing according to claim 6, characterized in that the control device of the housing comprises a control line intended to cause a change of state of the memory of the lens between a state validated and a state invalidated.   9. Camera housing according to claim 7, characterized in that it transmits a first order, to switch the lens control device in a standby mode, to the lens control device via the communication line of the housing and the communication line of the objective, the objective control device going into the standby mode on reception of the first order, and in that it transmits a second order, to send out the objective mode control device, to the objective control device passing through the communication line of the housing and the communication line of the objective, the 28211 71   lens control device exiting the   ensures receipt of the second order.   10. Photographic lens which can be mounted on and removed from a camera housing (100), characterized in that it comprises an objective memory (221) in which data relating to the photographic objective are stored; and a lens controller (211) which controls operations performed by the photographic lens, the lens memory and the lens controller operating with a first energy and a second energy which are supplied by the camera body, respectively, when the photographic lens is mounted on the camera body, the lens memory being attacked so that lens data is extracted to the camera body under control of the camera body when the latter supplies the first energy to the lens memory, and the lens memory being disabled, so that the lens controller communicates with the camera body device, when the device housing provides   second energy to the lens control device.   11. Photographic lens according to claim 10, characterized in that it further comprises a line (204) of lens communication, and a first line of lens energy and a second line (205) of energy d lens which are connected, respectively, to associated lines of the housing (100) of the camera when the photographic lens is mounted on this housing, the photographic lens communicating with the camera housing via the communication line d lens, the photographic lens receiving the first energy from the camera body through the first line of lens energy, and the photographic lens receiving the second energy from the camera body through the second goal energy line. 28211 71   12. Photographic lens according to claim 10, characterized in that it further comprises a command line for causing a change of memory state   of the objective between a validated state and an invalidated state.   13. Camera system comprising an camera body (100) and a photographic lens (200) which can be mounted on and removed from the camera body, characterized in that the photographic lens includes at least one of a lens memory (221), in which data relating to the photographic lens is stored, and of an electronic device (211), and in that the camera body includes a camera controller (111) which can communicate with the lens memory, a first energy which can be supplied to the photographic lens, and a second energy which can be supplied to the photographic lens, the capacity of the second energy being greater than that of the first energy, the memory of the lens and the electronic device operating with the first energy and the second energy, respectively, when the photographic lens is mounted on the body r of the camera, the camera control device supplying the first energy to the photographic lens to attack the memory of the lens in order to extract lens data from this memory when the photographic lens is mounted on the the camera body, and the camera control device supplying the second energy to the electronic device in the event that the camera control device determines, from the objective data retrieved from the objective memory, that the photographic lens