JP2009141867A - Lens interchangeable camera system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable lens interchangeable camera-integrated VTR device which is stable in the gravity of the device to give a good weight balance, even when the device is mounted on a tripod or on shoulder regardless of the type of a lens mounted thereon. <P>SOLUTION: In the lens interchangeable camera system, a counter-weight value, which can achieve a counter-balance of a cam recorder, as a whole, corresponding to the kind of lens and the type/summary of a recommended weight distribution system, are displayed on the camera view finder 105, in supplying power and mounting the lens on the system. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a video camera, and more particularly to a video camera system with interchangeable lenses.

  Widely used in broadcasting and professional video cameras, even in recent consumer video camcorders with higher performance, users can change lenses according to various subjects. There is a camera-integrated VTR (video tape recorder) device, which is a feature, and it is increasingly used for semi-business use. A conventional interchangeable lens-integrated VTR has a lens that captures an image as light, a camera head that converts an image of light captured by the lens into an electrical signal, and an electrical signal supplied from the camera head. Thus, it is composed of a video mechanism section for recording information on a tape-like recording medium or reproducing prerecorded information. Among these, the camera head unit and the video mechanism unit are housed in an apparatus casing configured so that the lens can be attached and detached, and are configured integrally with the apparatus casing. In addition, in the apparatus housing, a handle for suspension, a grip part configured integrally with a zoom key part for performing a zoom operation of the lens, a camera view finder for viewing an image captured by the lens, A microphone for capturing ambient sounds and an accessory shoe for attaching accessories such as a strobe and an illumination light are provided. Furthermore, a tripod hole for attaching the apparatus housing to a tripod mount of a tripod is provided on the bottom surface of the apparatus housing. At the time of shooting, the cameraman puts the camera body on the shoulder with the shoulder support member, holds the grip with his right hand to stabilize it, performs the necessary camera operation while looking at the viewfinder, or places the camera body on the tripod head Attach and operate the pan rod of the tripod to perform pan / tilt operations, and at the same time, focus focus, zoom / aperture operations, start / stop recording, etc.

In such a video camera with interchangeable lenses, like the lens interchangeable single-lens reflex camera disclosed in Patent Document 1, the specific information of the photographing lens such as the focal length value of the lens and the open aperture value is an electrical signal, It has a mechanism for sending it to the camera via the communication means and performing various fine lens controls based on the information.
JP 2001-083589 A

  The conventional consumer-use portable lens-interchangeable camera-integrated VTR apparatus has a configuration in which a three-plate type image pickup device based on an optical prism color separation method is incorporated in the camera head portion, similarly to a broadcast / business video camera. It is common. There are various image sizes, which are the size of the optical light receiving surface of the image sensor attached to the optical prism, depending on the type of the image sensor. Even with a small image sensor, an image sensor that has satisfactory performance even for use in, for example, HD (high-definition) video photography, which could not be expected in the past, has appeared, and as a high-performance high-vision portable lens interchangeable camera-integrated VTR device It has been commercialized. This image size is an example of an image sensor with a size of 1/3 inch (light receiving surface diagonal 6 mm), and the size of the optical prism to be attached can be relatively reduced. Compared with video cameras for video cameras, the video mechanism is not only equipped with compact VTRs based on consumer video tape cassettes, but in recent years it has been replaced with VTR systems, such as semiconductor memory, hard disks, optical disks, etc. By installing a video mechanism unit that uses as a recording and playback media, high-performance products have emerged that are inferior to broadcast and commercial video cameras in terms of performance.

  However, in the conventional consumer-use portable lens interchangeable camera-integrated VTR device, there is a situation where the weight of the lens attached to the main body and the weight of the main body cannot be balanced. In particular, in a lens having a high zoom magnification, in order to ensure lens performance, the aperture of the lens, the number of components, the mechanical parts for driving the lens, etc. are complicated, and this tendency is particularly noticeable for HD. However, there are some combinations in which the size and weight on the main body side are relatively small with respect to the size and weight of the lens, and when the tripod is installed, the front lens becomes heavy due to excessive balance of the lens weight, which makes it difficult to handle.

  FIG. 5 is a side view of a conventional portable lens interchangeable camera-integrated VTR apparatus when a tripod is installed. As shown in the figure, the weight balance of the entire camera has been lost, and a rotational force is applied around the tripod fulcrum, resulting in an unbalance. Camera work can be very difficult because of the sudden exposure of the photographer. Even when the photographer operates the camera on the shoulder, in such a combination where weight balance cannot be achieved, the position of the center of gravity is too close to the lens side, and the usability is not good.

  The present invention has been made in view of such circumstances. Regardless of the type of interchangeable lens, the operability of a television camera by a cameraman can be improved in all cases where various interchangeable lenses are attached to the camera body. An object is to provide a portable lens interchangeable camera-integrated VTR device.

  In order to achieve the above object, according to the present invention, in a photographing apparatus including a camera body and an interchangeable lens that can be attached to and detached from the camera body, the counter balance of the entire camera can be obtained in accordance with the type of lens mounted. It is characterized by displaying the type / outline of the counterbalance weight distribution system together with the counterweight value in the viewfinder provided in the camera body.

  Further, in the present invention, the counter weight value and counter balance weight distribution system type / outline to be displayed are weight balance information based on lens-specific ID information acquired from the attached interchangeable lens side and camera body-specific weight balance information. The counter balance information is preset based on the tripod seat mounting position provided in the camera body, which is determined based on the information obtained from the above.

  According to the portable lens interchangeable camera-integrated VTR apparatus according to the present invention, when the interchangeable lens is mounted, the counter weight value corresponding to the type of the mounted lens is set in the camera viewfinder so that the entire camera can be counterbalanced. Since it is displayed, it can be a reference value when the user prepares weight individually. Of course, this weight may be a dedicated weight member designed to be easily attached to the camera body as an accessory product of the camera body, for example. In addition, as a recommended combination configuration of the counterweight according to the type of the mounted lens, it is configured with an adapter holder attached to the camera body, battery holder, battery capacity, number of attached batteries, mounting member, external recording media drive device for external backup, etc. Since the type is set in advance corresponding to the type of interchangeable lens and the type / outline of the above recommended combination configuration can be discriminated when the lens is mounted, it is displayed on the camera viewfinder. It can be easily determined, and by installing the recommended combination components at the same time when the user wears the lens, the weight center of the device is stable and stable in both cases of tripod installation and shoulder mounting. That realized It is possible to construct a Portable interchangeable lens camera-integrated type VTR apparatus. Therefore, the camera can be operated while looking at the viewfinder with the most comfortable posture for each photographer when shooting, and when using the shoulder, and when using a tripod, a tripod pan can be used. Pan / tilt operability is improved, and each photographer's fatigue can be greatly reduced.

  Next, details of the present invention will be described in accordance with the description of the embodiments.

  A preferred embodiment of a portable lens interchangeable camera-integrated VTR device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a side view of a counterbalance configuration system of a portable lens interchangeable camera-integrated VTR apparatus according to an embodiment of the present invention, and an example of counterweight / counterbalance information display on a camera viewfinder. As shown in the figure, a portable lens-interchangeable camera-integrated VTR device 101 includes a camera head (not shown because of the internal mechanism of the housing) that captures an image as a subject and converts it into an electrical signal, Peripheral parts such as a handle, a zoom unit that is integrated with the zoom key for zooming the lens, a microphone for capturing surrounding sounds, and an accessory shoe for mounting accessories such as a strobe and illumination light And a video mechanism unit (not shown for the internal mechanism of the casing) that can process the electrical signals from the camera mechanism unit and the microphone and record the information on a tape-like recording medium and arbitrarily reproduce the recorded information. ) And the device casing 102 as a cabinet in which these camera head and video mechanism unit are accommodated. It is configured. Further, a tripod hole for attaching the apparatus housing to a tripod tripod seat is provided on the bottom surface of the apparatus housing 102. In addition, an interchangeable lens group 103 that captures an image as light is prepared, and the lens performance such as resolution, the focal length value on the wide side, the zoom magnification, the open brightness of the lens, etc. , It is systemized so that the user can select the type of lens according to various subjects. The interchangeable lens group 103 is fitted and attached to a dedicated lens mount surface 104 provided on the apparatus housing 102, and at the same time, electrical contacts provided on both the interchangeable lens group 103 and the apparatus housing 102 are placed at predetermined positions. Communication is performed on necessary information by a control device (microcomputer) which is connected to each of the interchangeable lens side and the device housing side. Furthermore, a camera view finder 105 for viewing an image captured by the interchangeable lens group 103 with the eyes is installed in the apparatus housing 102. An electronic viewfinder is applied as the camera viewfinder 105.

  Here, the adapter folder 201 is attached to the dual battery charger adapter 203 as shown in the lower part of FIG. 2 by screwing several attached metal members as shown in the upper part of FIG. However, it is comprised so that fitting and mounting | wearing are possible. The dual battery charger adapter 203 has a dedicated battery mounting portion, and is configured such that a maximum of two battery pack groups 204 of several sizes and capacities can be fitted and mounted. The dual battery charger adapter 203 has a specific weight, and the battery pack group 204 has, for example, a cell structure of a lithium ion type or a nickel metal hydride type. Have a weight of The dual battery charger adapter 203 has a function of charging the attached battery pack group 204 by connecting to a power source using an AC cable (not shown).

  In FIG. 1, the adapter folder 202 is designed to have a different total length from the adapter folder 201 so that a counterweight different from that when the adapter folder 201 is assembled can be obtained. According to the type of the interchangeable lens group 103 attached by the user, the portable lens interchangeable camera-integrated VTR device 101 as a whole has a good weight balance before and after the tripod hole provided on the bottom surface of the device housing 102. As described above, the combination type of the adapter folder 201 or the adapter folder 202, the dual battery charger adapter 203, and the battery pack group 204 to be attached to the dual battery charger adapter 203 to be attached to the device casing 102 recommended as a counterweight is set. Has been. Further, in the figure, the combination of recommended counterweight configurations is type 001, type 002, type 003, type 004, and type 005 according to the type of the interchangeable lens group 103, and the unique weight of the interchangeable lens group 103 is The combination type of the recommended counterweight configuration according to the weight distribution of the apparatus housing 102 is clearly shown. The above type name is described in the instruction manual of the portable lens interchangeable camera-integrated VTR device 101 or the interchangeable lens group 103, for example, so that any combination of interchangeable lenses can be combined by the user. By setting the counterweight configuration in advance, a portable lens interchangeable camera-integrated VTR device that realizes a good weight balance can be configured without hesitation. FIG. 4 is a diagram showing an example of realizing a good weight balance in this embodiment when a combination of recommended counterweight configurations is mounted.

  On the other hand, as shown in FIG. 1, counterweight / counterbalance information as shown on the display 106 is displayed as an example of display on the camera viewfinder 105 when the lens is mounted. That is, as shown in the figure, according to the attachment of the interchangeable lens group 103, the recommended value XXkg of the counterweight to be attached to the adapter folder 201 or the adapter folder 202 and the combination type name of the recommended counterweight configuration are displayed. Further, following the display on the display 106, as shown on the display 107, a detailed attachment member display is performed for the combination of recommended counterweight configurations. As an example of display on the display 107 in the figure, the product names of the adapter folder 201 or the adapter folder 202, the dual battery charger adapter 203, and the battery pack group 204 attached to the dual battery charger adapter 203 are used. These pieces of information are weight balance information and device based on lens-specific ID information acquired from the side of the attached interchangeable lens 103 through communication between a control device (microcomputer) built in each of the interchangeable lens 103 side and the device housing 102 side. It is determined based on information obtained from weight balance information unique to the main body of the casing 102. Here, the weight balance information acquired from the interchangeable lens 103 side may be the weight value of the lens itself, a code that simply represents the weight value, etc., a product name, a serial ID number, various Any information may be used as long as it is information that can specify the type of the interchangeable lens 103 such as specifications. These pieces of information are appropriately transmitted to the apparatus housing 102 side according to a predetermined communication protocol of the control device built in the interchangeable lens 103 side and the apparatus housing 102 side. After acquiring the lens-specific weight balance information, the counterweight / counterbalance information is displayed based on the weight balance information on the apparatus housing 102 side.

  FIG. 3 shows an example of an inexpensive weight built-in dummy battery pack designed and manufactured corresponding to the recommended counterweight value XXkg in the display content of the display 106. In the figure, there are several types of dummy battery packs 301 with built-in weights, depending on the types of recommended counterweight values. The weight values are displayed on the surface of the pack housing, etc. In accordance with the display of the recommended counter weight value on the display 301, the weight is set so that the weight can be easily selected and attached to the adapter folder 201 or the adapter folder 202.

  By preparing several types of dummy battery packs 301 in advance according to the type of interchangeable lens prepared by the photographer for the purpose of shooting, according to the display of the recommended value of the counterweight on the display 106 at the shooting site, As the interchangeable lens is attached, the corresponding dummy battery pack 301 can be easily selected and attached.

  In this embodiment, as a recommended combination example for counter balancing, the dummy battery pack 301, adapter folder 201 or adapter folder 202, dual battery charger adapter 203, dual battery charger adapter 203, battery pack group 204 are used. However, this is not limited to these members and is not shown in the figure. Of course, for example, this is a combination in which an adapter folder whose shape is changed so as to obtain a counterweight more effectively is added. Alternatively, separate devices such as external large capacity battery packs, external recording media drive devices such as hard disks for recording backups, and external media converter devices such as serial digital interface devices It may be a combination configuration of. The dummy battery pack 301 is not limited to a simple weight member, and may be a combination of the weight member and the separate device. In addition, the display example on the camera viewfinder 105 is not limited to the display means as shown in the display 106 and the display 107. For example, the counterweight / counterbalance and the configuration thereof using a lot of graphical user interface technologies are used. Various display means that make it more recognizable can be adopted. In the present invention, for convenience of explanation, the recording medium incorporated in the main body housing combined with the portable lens interchangeable camera is a small VTR. However, this apparatus is not limited to a small VTR, but also a semiconductor memory, a hard disk, an optical disk, etc. The present invention can be implemented even with a drive device that uses recording / reproducing media. That is, the present invention is not limited to the above-described embodiments, and various effective methods can be used based on the technical idea of the present invention. It can be changed.

It is a figure explaining the Example of this invention. It is a figure explaining the attachment methods, such as an adapter folder and accessories. It is a figure explaining the attachment method of the weight built-in dummy battery pack. It is a figure explaining the effect of this invention. It is a figure explaining the subject of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Portable lens interchangeable camera integrated VTR apparatus 102 Apparatus housing 103 Interchangeable lens group 104 Dedicated lens mount surface 105 Camera viewfinder 106 Camera viewfinder display example 107 Camera viewfinder display example 201 Adapter folder 202 Adapter folder 203 Dual battery charger adapter 204 Battery pack group 301 Weight built-in dummy battery pack

Claims (2)

In the interchangeable lens camera system comprising a camera body and an interchangeable lens that can be attached to and detached from the camera body,
The counterweight weight distribution system type / outline is displayed in the viewfinder provided on the camera body, along with the counterweight value that can be used to balance the entire camera according to the type of lens installed. Interchangeable lens camera system.   The counter weight value to be displayed and the type / outline of the counter balance weight distribution system include information obtained from the weight balance information based on the lens-specific ID information acquired from the attached interchangeable lens side and the weight balance information specific to the camera body. 2. The interchangeable-lens camera system according to claim 1, wherein the counter-balanced camera system is determined in advance and centered on a tripod mounting position provided on the camera body.

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