JPH0486626A - Camera - Google Patents

Abstract

PURPOSE:To easily execute an ISO setting operation by making a main dial for selecting an exposing controlling mode used as an ISO mode setting means. CONSTITUTION:A first mark group is constituted of three display marks; 'sports', 'person' and 'AUTO', etc., and expresses an exposing mode group which is suitable for a camera beginner having a little knowledge of a camera operation and a camera, And a second mark group is constituted of the marks of 'program', 'TV', 'AV', 'M', etc., and furthermore, expresses the exposing mode group which is suitable for a person who wants to freely use higher photographic technique. And 'ISO' mark is provided on the end of the second mark group and the main dial 5 is made to turn in such a way that this 'ISO' mark is set to an index 6 and also an UP/DOWN dial 3 is made to turn so that a desirable exposing setting of the ISO reference can be executed. Thus, the ISO mode can be easily be set and the design of a camera surface and a basic plan do not have to be drastically changed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a camera having an ISO mode setting means.

(Prior Art) ISO settings in conventional cameras are often automatically set by reading a so-called DX code, for example in low-priced cameras such as compact cameras. Furthermore, many cameras in which the ISO setting is manually set are provided with an ISO setting button, and the ■So setting is performed by rotating the tlP/DOWN dial while pressing the button.

[Problem to be solved by the invention]

However, when an ISO button is provided, there is a problem in that the camera surface becomes full of operation buttons and the like, making it difficult to operate the buttons and the like. Additionally, some cameras do not have space left for buttons, so it was necessary to make major changes to the camera design and basic design of the camera.

Also, with conventional cameras, you can press the 130 button while UP.
Since it is necessary to rotate the /DOIII dial, it is necessary to use both hands at the same time, but it has the disadvantage that it is extremely difficult to operate.

Also, recently, many cameras have placed the main dial for setting the exposure control mode on the left shoulder of the camera. However, since various operation buttons are already arranged on the right side of the camera, it was not possible to place the ISO setting button in a position that is easy to operate.

An object of the present invention is to provide a camera in which ISO settings can be made manually, and the camera is configured so that the ISO setting operation can be easily performed.

[Means to solve the problem]

The camera of the present invention is characterized in that the main dial for setting the exposure control mode also serves as an ISO mode setting means, and the main dial has a main dial that allows the ISO mode setting to be performed at the extreme end position. ing.

[For production]

In the camera of the present invention, the main dial serving as the exposure control mode setting means also serves as the ISO mode setting means, so the ISO mode can be easily set, and there is no need to make major changes to the camera surface design or basic design. do not have.

〔Example] The present invention will be explained in detail below.

FIG. 1 is a top view of the camera of the present invention, FIG. 2 is an enlarged view of the display in the finder of the camera, and FIG. 3 is a schematic diagram of the electrical configuration of the camera.

In Fig. 1, 1 is the camera body, 2 is a two-step push-down release button, 3 is a tlP/DOWN dial for changing the exposure time setting, which can be rotated around an axis parallel to the optical axis, and 4 1 is the exposure compensation button, 5 is the main dial for setting the exposure mode, 7 is the external display, 16 is the accessory shoe for attaching the flash, 18 is the interchangeable lens barrel, 1
Reference numeral 9 denotes a group of electrical connection terminals between the lens barrel 18 and the camera body 1.

Next, with reference to FIG. 1 and FIG. 3, the electrical configuration related to the above-mentioned members and various functions of the camera will be explained.

In FIG. 3, 31 is a microcomputer that controls the operation of the entire camera and performs exposure calculations, etc. The microcomputer 31 (hereinafter abbreviated as microcomputer) contains ROM, RA, etc.
A memory including M, etc. is provided.

32 is an incremental rotary encoder provided in connection with the UP/DOWN dial 3; 33 is a shutter and mirror control circuit; 34 is a magnet for releasing the tension of the front curtain of the shutter; 35 is a magnet for releasing the tension of the rear belly of the shutter; 36 is a motor for raising and lowering the mirror, 29 is a photometric circuit, 28 is a photometric element, and 3rd is a display control circuit that controls the external display 7 and the liquid crystal of the finder 20.

Further, in FIG. 3, the switch SW1 is a switch that is turned on in conjunction with the first step depression of the release button 2, and the switch SW2 is a switch that is turned on in conjunction with the second step depression of the release button 2.

IIP/DOWN dial 3 has two sliding contact pieces UD1
and UD2 are provided, the contact piece rotates with respect to a coding plate (not shown), and the amount of movement of the sliding contact piece with respect to the coding plate is detected as a digital electric signal. A known incremental rotary encoder 32 is constituted by the contact pieces UD1 and UD2 and the encoding plate. For example, UP/DOWN dial 3 is 1 to the right.
When you click and rotate, the Tv setting value changes to 0 towards the high speed side.
．． When the dial 3 is rotated 1 click to the left, the Tv setting value changes by 0.5 steps to the high speed side, and when the dial 3 is rotated 1 click to the left, the Tv setting value is changed by 5 steps. is set to change by 0.5 steps toward the slow speed side.

SWCMP is a switch that is linked to the exposure compensation button 4. When the button 4 is pressed, the switch SWCMP is closed, and exposure compensation can be performed by rotating the UP/DOWN dial 3 while pressing the button 4. I can do it.

Four switches MAIN1 to MAIN4 are provided in association with a main dial 5, and the dial 5 is rotatable about an axis perpendicular to the plane of the paper in FIG. As shown in FIG. 1, exposure mode marks corresponding to various shooting situations are provided on the surface of the dial 5, and the dial 5 is adjusted so that one of the exposure mode marks is aligned with the index 6 on the top surface of the camera. You can set your preferred exposure mode by rotating the . In the camera of the present invention, an ISO setting mark rIsOJ is provided on the dial 5 in addition to each exposure mode mark. The following two mark groups are provided on the surface of the main dial 5 with the rLOcKJ mark as a boundary.

The first group of marks is “Sports 4.”People.

It consists of three display marks such as rAUTo, , etc., and this mark group represents an exposure mode group suitable for camera beginners who are not familiar with camera operations or camera knowledge. Also, the second mark group is rprogram J, r
It consists of marks such as TV VJ, r A VJ, r M J, etc., and these marks indicate exposure modes (i.e., creative modes) for people who are somewhat familiar with camera operations and those who want to use more advanced shooting techniques. represents a group. And at the end of the second group of marks is 'I
By rotating the main dial 5 and rotating the UP/DOWN dial 3 so that this "■so" mark is aligned with the index 6, you can set the exposure based on your favorite ■so standard. It is now possible to do so.

The four switch groups from switch MAIN1 to switch MAIN4 are switch groups that generate 4-bit signals, and the 4-bit signals are defined so that their positions do not overlap according to the rotational position of the main dial 5. A digital signal consisting of the following is input to the microcomputer 31. Therefore,
The microcomputer 31 receives information about what exposure mode has been selected by the main dial 5, and controls the shutter, aperture, etc. based on this information.

In addition, in FIG. 3, AP is an electric aperture device provided in the lens barrel 18, and Fe2 is a lens drive device.

As shown in the first section, the screen of the external display 7 includes an area for displaying shutter speed 8 and ISO value, an area for displaying aperture value 9, an area for displaying film count value 13, a square bracket 12, and exposure compensation. A scale 14, an arrow 15 representing an exposure correction value, etc. are displayed.

In addition, as shown in FIG.
Also displayed are a shutter speed 8, an aperture value 9, an arrow 15 representing an exposure compensation value, an exposure compensation value display scale 14, and the like.

Figure 's4 is a flowchart of a program executed by the microcomputer 31.

FIG. 5(a) shows the frame count value FLM (13), shutter speed TV (8), aperture value AV (9), and exposure based on the exposure setting results on the main dial 5 and the on or off state of the switch SWI. Correction scale S
CL (14) and exposure compensation value CP M (15) are displayed on the external display 7 and the viewfinder display 20 (
○) or not displayed (x).

5(b) to FIG. 5 (hl indicates the screen of the external display 7 corresponding to each of the various exposure modes set by the main dial 5.

The operation of the camera of this embodiment will be described below with reference to Section 1 and FIG. 3, and FIGS. 4 and 5.

Before explaining the flowchart of FIG. 4, the contents of the flags shown in the flowchart of FIG. 4 will be explained below.

A) Flag dsPFLM Flag indicating whether to display the film count value 13 B) Flag dsPTV Flag indicating whether to display the shutter speed 8 C) Flag dSPAV Flag indicating whether to display the aperture value 9 D) Flag dsPSCL Flag indicating whether to display the exposure compensation scale 14 E) Flag dsPCMP Flag indicating whether to display the exposure compensation value 15 F) 7 lag dsPsV Flag indicating whether to display the ISO value Next, Fig. 4 and The operation of the camera of this embodiment will be explained with reference to FIG.

In FIG. 4, the microcomputer 31 enters the standby state at Sol, and "N" (No) is assigned to each memory in the microcomputer 31 at SO2. As a result, the flags dsPFLM, dsPTV, dsPAV.

dsPCMP, dsPSCL, dsPsV are all “N”
'', and when this state is reached, proceed to SO3.

For SO3, 11P/DOWN dial 3 variation DTE
Read NC and proceed to S04.

In No. 4, check the position of the main dial 5. If it is ISO mode, proceed to S05, if it is AV mode, proceed to S07, if it is M mode, proceed to S11, if it is TV mode, proceed to S13, if it is P mode, proceed to S17. , respectively.

Also, if the second group mode, AUTO mode, portrait mode, or sports mode is set on main dial 5, S
Proceed to 21.

Furthermore, if the main dial 5 is set to "LOCK", the process advances to S23.

(i) When ISO mode is selected, the ISO value S V changes every 173 steps at SO5, SO6
ISO with 7lag dsPsV as Y” (YES)
The process advances to 523 to display the value on the display 7 and the finder display screen 20.

(if) If the AV mode is selected, the flag dsPAV and the flag dsPC are set in 507.
After setting MP to "Y", proceed to SO8. S in SO8
It is checked whether WCMP (exposure compensation button 4 switch) is pressed. If it is pressed (ON), the process proceeds to SO9; if it is not pressed, the process proceeds to SIO. If you proceed to SO9, change the exposure compensation value Cv by 1/2 stop for each click of the UP/DOWN dial 3 #S1
At 0, the aperture value AV is changed in steps of 172 steps.

(iti) If M mode is selected, 7y in S11.
Set dsPAV and dSPTV to "Y" and proceed to S12. In S12, check whether the switch SWCMP (exposure compensation switch) is ON or not. If it is ON, proceed to 310.
If it is OFF, the process advances to S16. In S16, the shutter time TV is changed in steps of 172 steps.

(iV) If the TV mode is selected, the 7lag dSPTV and dsPcMP are set to Y" in S13. The state of the switch SWCMP is checked in S14, and if it is ON, S1
If it is OFF, the process proceeds to S16.

In S15, the exposure correction value Cv is changed by 172 steps for each step of rotation of the UP/DOWN dial 3.

(v) If p mode is selected, the flag dSPCMP is set to Y" in 517. Proceeding to 318, it is checked whether the exposure compensation button 4 is pressed (SWC
It is checked whether MP is ON or not. If it is ON, the process proceeds to S19; if not, the process proceeds to S20.

519, the exposure correction value CV is changed by 172 steps for each step of rotation of the tlP/DOWN dial 3.

In S20, set the flag dSPSCL to "Y" and set the exposure compensation scale 14 to the external display 7 and the viewfinder display 20.
Display as . '), proceed to S22.

In step S22, the flag dSPFLM is set to "Y" and the film count value 13 is displayed), and the process proceeds to step 523.

After completing the program corresponding to the exposure mode selection using the main dial 5 as described above, the process proceeds to step 323 to execute the display routine shown in FIG. 4(b).

Display routine 551: Set flag dsPcMP to key, if “Y”, 5
Go to S52, and if "N" go to S55.

S52: Check whether M mode is selected with main dial 5, if "Y" go to 553, if "N" go to 5
Proceed to step 54.

S53: Display ΔEV with arrow 15 and proceed to S55.

S54: Display the exposure compensation value CV with arrow 15, and proceed to S55.

S55: Check flag dSPFLM, if “Y”, 5
If the result is "N", the process advances to S57.

S56: Display film count number 13, mark bracket 1
Turn on 2 and proceed to 557.

S57: Check the flag dSPTV (whether or not it is necessary to display the shutter time). If "Y", go to 358; if "N", go to S59.

558: Shutter time TV (8) is displayed on the external display 7 and the viewfinder inner surface screen 20.

S5! l Near Arrag dSPAv (Display of aperture value 9) Adjust to 56f) if “Y”, to 561 if N” S60: Display aperture value AV (9) on external display 7 and finder screen 20.

S61: Flag dsPsc: L (Exposure compensation scale 14
If it is "Y", go to 562, if it is "N", go to 5.
Go to 63.

S62: Display the exposure compensation scale 14 on the external display 7 and the finder screen 20.

S63: Check the flag dsPsV (I SO value),
If "Y", go to S64; if "N", go to S65.

S64: Display the ISO value 17 [see FIG. 5(b)] on the external display 7 and the finder screen 20.

With the above steps, the display routine 523 is completed, and the process advances to the main routine 524.

Check whether S24 release button interlock switch SW1 is pressed, and if SWI is ON, go to 525, SW
If I is OFF, go to 502.

S25: Make the photometry circuit 29 perform photometry to obtain BV,
Proceed to 2B.

52 [1: Calculate F and V. Proceed to 530.

Check which exposure mode has been selected by S30 and main dial 5.

After this, the operation is divided as follows depending on the exposure mode selected by the main dial 5.

(a) P mode, A11TO mode, person mode,
If sports mode is selected (531-532
→536).

S31: Obtain the AV corresponding to the EV using the glogram mode diagram set in advance for each of the above modes.

532: Calculate TV.

(b) When the ^V mode is selected (proceed to S32).

532: Find TV. 536 Go forward.

(c) When TV mode is selected (proceed to S33)
.

S33: Find AV. Proceed to 536.

(d) When M mode is selected (S34→S35→
536).

S34: Find ΔEV.

S35: Set the flag sSPCMP to "Y".

(e) When the main dial 5 is set to Iso mode and Lock.

Return to 502.

The above-mentioned flows (a) to (d) finally merge to 536, and thereafter the microcomputer 31 executes the same steps up to 542 in the same flow.

S36: Both flags dSPTV and dSPAV are “Y”
”

S37: Execute the display routine (550-565).

The contents of the display routine have already been explained, so a description thereof will be omitted.

Is 538 Nirezu button interlocking switch SW2 ON or O?
Check if it is FF, if it is ON, proceed to S39, if it is OFF, proceed to 50
Return to 2.

S39: Issue a command to the control circuit 33 (FIG. 3) to raise the mirror and at the same time operate the electric aperture device AP in the lens barrel 18 to drive the aperture.

The S4 discharge control circuit 33 excites the shutter front curtain release magnet 34 and the shutter rear curtain release magnet 35 to perform shutter drive.

S41: The control circuit 33 drives the motor 36 to lower the mirror, simultaneously drives the aperture device AP in the lens barrel 18 to open the aperture, and furthermore, the motor 36 operates to charge the shutter.

S42: The control circuit 33 drives the motor 36 to wind the film.

The entire operation of the camera of this embodiment has been explained above.

〔Effect of the invention〕

As explained above, in the camera according to the present invention, the main dial for setting the exposure mode also serves as the ISO setting means, so there is no need to provide a special dedicated ISO mode setting button etc. on the camera surface. Therefore, according to the present invention, it is possible to provide a camera that can perform ISO mode standard photography in almost the same way as conventional cameras without changing the design of the camera surface or the basic design of the camera exterior.

[Brief explanation of drawings]

FIG. 1 is a schematic top view of the camera of the present invention, FIG. 2 is an enlarged view of the viewfinder display of the camera, and FIG. 3 is a schematic diagram of the electrical configuration of the camera that is related to the present invention. 4
The figures are flowcharts of control operations executed by the electrical configuration shown in Fig. 3, in which Fig. 4 (a) shows the main routine, Fig. 4 (b) shows the subroutine, and Fig. 5 ( a) is a table showing the correspondence between the exposure mode selected by the main dial of the camera and various displays displayed on the external display and the viewfinder screen, and Fig. 5(b) to Fig. 5(h) are 5A is a diagram illustrating several types of display states shown in FIG. 5(a); FIG. 1...Camera body 2...Release button 3
...UP/DOWN dial 4...Exposure compensation button 5...Main dial 6...Index 7...External display 8...Shutter time 9...Aperture value 13...Film Count value 14...Exposure compensation scale 15...Arrow 16...
Accessory shoe 17... ISO value 18... Lens barrel 19
...Electrical connection terminal 20...Finder screen 28...Photometry element 29...Photometry circuit 31...
...Microcomputer 33...Shutter and mirror control circuit 34...Shutter front curtain tension release magnet 35...Shutter rear curtain tension release magnet 36...Motor
37...Display control circuit AP...Electric aperture device Fe2-...Lens drive device Fig. 5 and 4 others

Claims (1)

[Scope of Claims] 1. A camera having a main dial for selecting an exposure control mode, characterized in that the main dial also serves as ISO mode setting means. 2. The camera according to claim 1, wherein the ISO mode setting means includes a release prohibition means for prohibiting a release operation in response to setting of the ISO mode.