JP2003295266A - Camera system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera system by which photographing is freely performed even though flash light is emitted by attaching a W conversion lens or a T conversion lens. <P>SOLUTION: A second flash light emitting part 121 is attached to an adapter 120 equipped with conversion lenses whose lens specifications are different so that emitted flash light by a first flash light emitting device arranged on the side of a camera main body 110 is not vignetted by the adapter 120 at the time of attaching the adapter 120 on the side of the camera main body 110. When the adapter 120 is attached, a light emission trigger signal and electric power to be supplied to the first flash light emitting part 111 are supplied to the second flash light emitting part 121 provided at the adapter 120. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera system in which an adapter having a conversion lens is detachably attached to the front surface of the lens of a camera body.

[0002]

2. Description of the Related Art There is a case in which a photographing lens mounted on a camera body is used to photograph by mounting a conversion lens which realizes a lens specification different from that of the photographing lens only. In recent years, many such adapters have been released for electronic cameras. Among them, there is one called a WIDE converter adapter (hereinafter referred to as W converter) or a TELE converter adapter (hereinafter referred to as T converter).

This W-con or T-con adapter is detachably mounted on the front surface of the taking lens on the camera body side, and in cooperation with the taking lens on the camera body side, has a lens specification different from only the taking lens on the camera body side. It is equipped with a conversion lens to achieve. The W conversion is equipped with a conversion lens capable of setting a zoom range corresponding to a wide-angle lens, and the T conversion is equipped with a conversion lens capable of setting a zoom range corresponding to a telephoto lens. Also, some adapters such as W-con and T-con have a conversion lens with a fixed magnification.

In a camera system in which an adapter such as a W-con or a T-con is attached to the camera body for photographing, a nighttime photographing may be performed by flash light emission from a flash light emitting section provided on the camera body side.

FIG. 4 is a schematic view of an adapter mounted when a flash light is emitted from a flash light emitting section 111 provided on the camera body 110 side when shooting is performed at night using the camera system 100. Shows the situation.
In order to make the description easier to understand, the adapter 120a
The situation of flash light emission is shown even when is not attached.

FIG. 4 is a diagram showing a light emitting area of the flash light emitted from the flash light emitting section 111.

FIG. 4A is a view showing a light emitting area when the adapter 120a is not attached. FIG. 4B shows the adapter 120.
It is a figure which shows the light emission area at the time of mounting of a.

As shown in FIG. 4A, an adapter 120a
If is not attached, the flash light is emitted toward the subject without any obstacle.

However, the adapter 120a such as the W-con or the T-con is mounted on the lens barrel 112 of the camera body 110.
When the camera system 100 mounted on the front surface for shooting is configured, the flash light emitting unit 11 on the camera body 110 side is configured.
A situation may occur in which the flash light emission from No. 1 is eclipsed by the adapter 120a such as the W controller or the T controller. When such an eclipse occurs, as shown in FIG. 4B, the flash emission from the flash emission unit 111 is eclipsed by the adapter 120a such as the W or T converter, and the range B is not irradiated with the light. When the photograph taken at this time is developed, the photograph in the range B is shaded as shown in FIG. FIG. 5 is a diagram showing a photograph affected by vignetting.

Therefore, a camera system 100 to which an adapter 120a such as a conventional W converter or T converter is attached.
In the above, since the flash light emission performed by the flash light emitting unit 111 on the camera body 110 side may be blocked by the adapter 120a such as the W-con or the T-con, the magnification of the conversion lens provided in the adapter may be restricted. . Therefore, in such a conventional camera system as described above, there occurs a situation in which shooting with flash light emission cannot be performed depending on the magnification of the conversion lens provided in the adapter 120a such as the W-con or T-con.

[0011]

As described above, when the adapter such as the W-con or the T-con is mounted on the camera and the flash light is emitted from the flash light emitting portion in the camera body,
There is a problem that the quality of the photograph cannot be maintained because the flash light emission may be obscured by an adapter such as a computer or a computer. Also, depending on the adapter installed in the camera body, if the zoom range of the conversion lens provided in the adapter exceeds a predetermined value, there is a risk of injuries.Therefore, the zoom range may be restricted. There is. Further, in the case of an adapter equipped with a conversion lens having a fixed magnification, there is a possibility that the adapter may be injured and therefore cannot be mounted.

In view of the above circumstances, the present invention provides a camera system capable of shooting with flash emission without restriction even if the magnification of a conversion lens provided in an adapter such as a W-con or T-con is large. The purpose is to

[0013]

A first camera system of the present invention which achieves the above object has a first flash light emitting section which emits flash light in response to supply of a light emission trigger signal and power.
A camera body having a lens barrel that includes a flash light emitting device that generates a light emission trigger signal in synchronization with shooting and supplies power to the first flash light emitting unit; and a shooting lens that forms an image of a subject, And an adapter equipped with a conversion lens that is detachably mounted on the front surface of the taking lens and that realizes a lens specification different from that of the taking lens in cooperation with the taking lens. A second flash light emitting unit that receives a power supply and emits a flash light, and the second flash light emitting unit is connected to the camera body to receive a light emission trigger signal and power from the camera body and receive the second flash light emitting unit. A second connector for transmitting the light emission trigger signal and electric power to the second flash light emission unit by coupling the camera body with the first connector. And characterized in that with the connector.

According to the above-mentioned invention, by connecting the first connector and the second connector to each other, the flash light emission from the second flash light emitting portion provided on the adapter side can be performed, so that the flash light emission is prevented. .

Here, it is preferable that a sensor for detecting attachment / detachment of the adapter is provided, and the flash light emitting device prohibits emission of flash light by the first flash light emitting portion when the adapter is mounted. .

As described above, when the adapter is mounted, the flash light emission of the first flash light emitting unit is prohibited, and only the flash light emission from the second flash light emitting unit is performed.
It is possible to perform flash light emission from only the second flash light emitting unit without bothering to cover the first flash light emitting unit.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

FIG. 1 is an external view of a camera system showing a first embodiment of the present invention.

As shown in FIG. 1, the adapter 120 is attached to the camera body 110. The adapter 120 is provided with a conversion lens which satisfies the specifications such as a wide-angle lens or a telephoto lens in cooperation with the taking lens of the camera body 110. The adapter 120 provided with this conversion lens has a substantially cylindrical member, and the opening of the member is widened in the direction in which the subject is directed. A conversion lens is provided in the substantially cylindrical tube. A screw portion is provided on the side opposite to the side where the opening is widened so that the adapter 120 can be attached to and detached from the camera body 110. A screw part is also provided on the camera body 110 side so as to match the screw part provided on the adapter side.
The adapter 120 provided with the conversion lens is attached to the camera body 110 by engaging both screw parts. At this time, a conversion lens is provided in front of the taking lens in the lens barrel 112 of the camera body 110, and the conversion lens and the taking lens of the camera body 110 realize a wide-angle or telephoto lens specification.

The adapter 120 used in the camera system of this embodiment is provided with a second flash light emitting section 121, and the second flash light emitting section 121 is supplied with a light emission trigger signal and power necessary for flash light emission. A connecting cord 122 is also provided which enables it. Furthermore, this connection cord 12
The second end provided on the side surface of the camera body 110
A first connector 123 is provided which mates with the connector 116 of FIG. The adapter 120 is attached to the camera body 110, and the first connector 116 and the second connector 1 are attached.
When 23 and 23 are combined, the light emission trigger signal generated by the flash light emitting device provided on the camera body 110 side and the electric power required for flash light emission can be supplied to the second flash light emitting unit 121. If a picture is taken at this time, flash light is emitted from the second flash light emitting section 121 in synchronization with the picture.

In order to operate the second flash light emitting section 121 as described above, a light emission trigger signal and electric power are supplied only to the second flash light emitting section 121 from the flash light emitting apparatus provided inside the camera body 110. It is preferable. Desirably, a switching unit for switching the light emission trigger signal supplied from the flash light emitting device and the power supply destination from the first flash light emitting unit 111 side to the second flash light emitting unit 121 side is provided, and this switching unit is an adapter. It is preferable to switch when is attached.

This switching of the supply path is limited to when the adapter 120 is mounted as shown in FIG. 1, so that a detection unit for detecting the mounting of the adapter 120 is provided on the camera body 110 side and the adapter 120 side. Is provided.

In FIG. 2, the adapter 120 is the camera body 11
The means for detecting that the adapter 120 is mounted on the camera body 110 when it is screwed in and mounted on 0 is shown. FIG. 2A is a diagram showing a situation around the detection unit provided in the camera body 110 and the adapter 120 when the adapter 120 is not attached, and FIG.
Camera body 110 and adapter 12 when 0 is attached
It is a figure which shows the condition of the detection part provided in 0 and.

Here, the adapter 120 is the camera body 11
The adapter 120 when screwed into 0 and mounted
A reflection type photocoupler 117a and a reflection sheet 124 are shown as means for detecting the attachment of the.

FIG. 2 is a diagram showing how the mounting of the adapter 120 is detected on the camera body 110 side when the adapter 120 is screwed and mounted on the lens barrel 112 on the camera body 110 side.

As shown in FIG. 2, a reflection sheet 124 is attached to the tip of the camera body 110 side of the adapter 120. This adapter 120 is a screw-in type, and the adapter 120 is used for the lens barrel 11 of the camera body 110.
As it is screwed into the outer peripheral portion of 2, the lens barrel 112 of the camera body 110 is mounted. The adapter 120 is detachable, and the adapter 120 can be removed from the lens barrel 112 of the camera body 110 by rotating the adapter 120 in the opposite direction.

When the adapter 120 is attached to the camera body 110, the reflection sheet 124 of the adapter 120 blocks the light from the photo coupler 117 arranged on the camera body 110 side. Then, the light emitted from the light projecting portion of the reflective photocoupler 117 is reflected by the reflective sheet 1.
The reflected light is reflected by 24, and the reflected light is detected by the light receiving portion of the photocoupler 117.

FIG. 3 is a block diagram in which only a portion related to flash light emission is extracted from the signal processing section provided inside the camera. The configuration of the signal processing unit inside the camera will be described with reference to FIG.

As shown in FIG. 3, when the photocoupler 117 receives the light reflected by the reflection sheet 124, a detection signal from the photocoupler 117 is supplied to the microcomputer 113. The microcomputer 113 receives the supplied detection signal and supplies the switching signal sel to the switching unit 115. In the switching unit 115, the light emission trigger signal and the power supply path supplied from the flash light emitting device 114 to the first flash light emitting unit 111 are switched, and the second flash light emitting unit 1
A signal supply path to 21 is formed. If shooting is performed at this time, flash light emission from the second flash light emitting unit 121 is performed in synchronization with the shooting. Further, at this time, the supply path to the first flash light emitting unit is cut off, so that the flash light emitting device 1
The supply of the light emission trigger signal and the power from 14 to the first flash light emitting unit 111 is prohibited.

With such a structure, when the adapter 120 is attached to the camera body 110, flash light is emitted only from the second flash light emitting section 121, not from the first flash light emitting section 111. In addition, the second which the adapter 120 has
Since the flash light emitting section 121 is disposed above the front end widened toward the subject, the flash light emission from the second flash light emitting section 121 is not blocked by the adapter 120.

Further, since the second flash light emitting section 121 located above the tip of the adapter 120 emits flash light, the lens specification is better than that of the first flash emitting section 110 in the recessed position. Good flash emission can be achieved within the shooting range where the angle of view is widened.

As described above, since the second flash light emitting section 121 is provided on the adapter 120 side, the adapter 120
When is attached, the light emission trigger signal and electric power from the flash light emitting device 114 are supplied to the second flash light emitting unit, and the
Flash light is emitted only from the flash light emitting section 121. Further, since the second flash light emitting section 121 is provided above the tip opening of the adapter 120 which is widened toward the subject, the flash light emission from the second flash light emitting section 121 is blocked by the adapter 120. Never. Further, conventionally, when the adapter 120 equipped with a conversion lens was attached, it was not possible to perform shooting with flash emission depending on the magnification of the conversion lens, but the camera system 100 of the present embodiment eliminates such a restriction. The user can freely take a picture even at night.

[0033]

As described above, according to the camera of the present invention, what is the magnification of the conversion lens when the adapter having the conversion lens such as the W conversion or the T conversion is attached to the camera body. Even if there is, it is possible to provide a camera system capable of freely photographing with flash emission.

[Brief description of drawings]

FIG. 1 is a perspective view of a camera system according to a first embodiment of the present invention as seen from diagonally above the front surface.

FIG. 2 is a diagram showing a configuration of a detection unit that detects that an adapter including a conversion lens is attached to a camera body.

FIG. 3 is a block diagram showing a configuration of a first flash light emitting device on the camera body side and a flash light emitting unit on the adapter side.

FIG. 4 is a diagram showing a conventional camera system.

FIG. 5 is a diagram showing a defect situation of a developed photograph when a flash light emission is performed by the camera system of FIG. 4 to take an image.

[Explanation of symbols]

100 camera system 110 camera body 111 First flash emission unit 112 lens barrel 113 Microcomputer 114 Flash light emitting device 115 switching unit 116 First connector 117 Photo Coupler 120 adapter 121 Second flash emission unit 122 Connection cord 123 Second connector 124 Reflective sheet

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G03B 17/12 G03B 17/12 Z 17/56 17/56 FF term (reference) 2H053 AA02 AB03 AB04 AB08 AC00 AC21 AC22 BA01 BA03 BA04 BA21 CA22 CA32 CA41 CA45 DA00 DA04 2H101 EE01 EE03 EE04 EE05 EE13 EE21 EE31 EE51 EE52 EE76 EE79 EE83 2H105 CC01 CC02 CC29 EE21 EE26

Claims (2)

[Claims] 1. A first flash light emitting section that emits a flash light in response to a light emission trigger signal and power supply is provided, and a light emission trigger signal is generated in synchronism with photographing and power is supplied to the first flash light emitting section. A camera body including a flash light emitting device for supplying light, a lens barrel having a photographing lens for forming an image of a subject, and the photographing lens, which is detachably mounted on the front surface of the photographing lens, in cooperation with the photographing lens. An adapter including a conversion lens that realizes a lens specification different from the above, the adapter further including a second flash light emission unit that emits a flash light in response to supply of a light emission trigger signal and power, A second connector for connecting a second flash light emitting unit to the camera body, receiving a light emission trigger signal and power from the camera main body, and transmitting the signal to the second flash light emitting unit; But A camera system comprising a second connector coupled to the first connector to supply a light emission trigger signal and electric power to the second flash light emitting section. 2. A sensor for detecting attachment / detachment of the adapter is provided, wherein the flash light emitting device prohibits emission of flash light by the first flash light emitting portion when the adapter is mounted. The camera system according to claim 1.