JPH06301097A - Camera having focus aid indication - Google Patents

Abstract

PURPOSE:To provide a camera having focus aid indication capable of recognizing the degree of focusing or non-focusing without taking the eyes off a subject. CONSTITUTION:In this camera having the focus aid indication capable of performing manual focusing while confirming a focusing state based on electronic range-finding information; the focus aid indication is constituted of a pair of indexes 28a and 28b bisected up and down, and similar pairs of indexes 28c and 28d, 28e and 28f, 28g and 28h, 28i and 28j, and the upper and the lower indexes are nearly alinged to be superposed on a range-finding range frame 22a nearly in the center of a finder visual field at the time of focusing as shown in (C), and the upper and the lower indexes are mutually moved in a reverse direction as the degree of non-focusing gets larger at the time of non-focusing as shown in (A), (B), (D) and (E).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a focus-aid display, and more particularly to a camera having a focus-aid display for electro-optically displaying whether or not a focus state is achieved.

[0002]

2. Description of the Related Art Conventional distance measurement includes a double image matching type interlocking range finder, a single prism reflex using a micro prism, a split image and the like. However, these focusing accuracy largely depends on the photographer's familiarity and skill.

On the other hand, various cameras have been commercialized for automatically adjusting the focus on the basis of electronic distance measurement information and photographing, but such a camera is called a camera although the skill of the photographer is not required. "Pleasure to operate" from tools
Had taken away.

For both of the above, an autofocus camera capable of manual focusing has been proposed,
Some have already been commercialized. FIG. 20 shows an example of such a camera focus display. As shown, the distance measurement range frame 102 is displayed in the center of the visual field, and the index 103 that digitally displays the in-focus state and the indexes 104a and 104 that digitally display the out-of-focus state.
and b are provided outside the field of view 101. Then, the focus can be manually adjusted with reference to such a focus aid display.

With this method, however, it is possible to know whether the focus is out of focus or out of focus and whether the focus shift is on the near distance side or the far distance side, but the degree of the focus shift is unknown. . Further, since the focus aid display is displayed outside the field frame, there is a problem that the photographer's eyes are separated from the subject of interest while adjusting the focus.

[0006] Japanese Utility Model Laid-Open No. 60-63833 discloses a camera incorporating an autofocus mechanism that cannot perform manual focusing. This camera has a frame mark display means for indicating a distance measuring range and a measuring means. After finishing the distance, the display of the frame mark or the vicinity
It is provided with a lighting means or a blinking means for lighting. However, the camera described in this publication blinks or blinks only when focusing is achieved by AF, and cannot display the amount of focus shift. Further, the embodiment described in the publication only discloses an inverted Galilean type finder, and does not describe any real image type finder.

[0007]

As described above, in the conventional camera, it is necessary to separate the line of sight from the subject in order to confirm the in-focus and out-of-focus states. There was a problem that the degree could not be recognized.

The present invention has been made in view of the above problems, and provides a camera having a focus-aid display capable of recognizing the degree of in-focus or out-of-focus without separating the line of sight from the subject. It is an object.

[0009]

In order to achieve the above object, in a camera having a focus aid display according to the present invention, the focus aid display is located substantially in the center of the viewfinder field when focused. When the object is out of focus, the greater the degree of the out-of-focus, the more the image is displaced outward from the center.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 9 show a first embodiment of the present invention. As shown in FIG. 1, the camera 1 includes a lens barrel 3 that extends from the center of the front surface of the camera body 2 toward the front.
A diaphragm ring 5 for adjusting the diaphragm is provided on the front side of the peripheral surface of the lens barrel 3, and a focus adjusting ring 6 for manually adjusting the focus is provided on the rear side of the peripheral surface. An electronic object distance measuring device 8 is provided on both sides of the base of the lens barrel 3 on the front surface of the camera body 2, and a finder 7 for observing the object is provided on the right side of the drawing. It is provided. Further, on the left side of the upper surface of the camera 1 in the drawing, a release button 9 for photographing is provided at a position where it can be pressed by the index finger or the like of the right hand.

Next, the viewfinder 7 of the camera 1 of the first embodiment will be described with reference to FIGS. 3, 4, and 5. In addition, in FIG. 3, in order to show the shapes of the respective members in an easy-to-understand manner, the distance between the members is shown with some distance therebetween. As shown in FIG. 3, the finder 7 has an objective lens 21 and an intermediate image of the objective lens 21 formed in the vicinity of the exit end face in order along the optical axis. For example, a first prism 22 in which a small circular distance measuring range frame 22a is engraved, a photographing range frame 2 indicating a photographing range
A second prism 24 having three and three reflecting surfaces and an eyepiece lens 25 are provided, and the first prism 22 and the second prism
An erecting prism is configured by combining the prisms 24, and is a real image type finder that allows a photographer to see an erecting image of a subject when observed through the eyepiece lens 25. The distance measuring range frame 22a and the photographing range frame 23 are
Is an optical position that can be seen at the same time as the subject image when observed through the eyepiece lens 25.

An auxiliary prism 26 in the shape of a right-angled triangular prism is joined to the first reflecting surface of the second prism 24, and the color of the display is changed on the lower end surface of the auxiliary prism 26 in the figure as necessary. The light emitted from the LED 27 that emits two colors is incident through the LCD 28 and the mask 29. The LCD 28 is of a transmissive type that makes a negative display and has a display pattern as shown in FIG. 8, and the illumination of the LED 27 from the back makes the display pattern look bright. That is, the indicators 28a, 28 which are the display elements to be displayed
b, 28c, 28d, 28e, 28f, 28g, 28
When a voltage is applied to the electrodes of h, 28i, and 28j, the index becomes transparent and looks bright due to the transmitted light of the LED 27. In addition, the code 2 around these indexes
The portion 8k is a portion that does not transmit light. Also,
The mask 29 is provided to shield an extra portion of the LCD 28.

Next, the joint surface between the second prism 24 and the auxiliary prism 26 will be described in detail with reference to FIG. The joint surface between the second prism 24 and the auxiliary prism 26 is
As shown in the figure, the peripheral portion 26a (24a) is coated with a total reflection mirror, and the central portion 26b (24b) is coated with a rectangular half mirror. The reflectance is different.

As a result, the light flux 35 that has entered the second prism 24 from the first prism 22 has a peripheral edge portion 26a (24).
In a), most of the light is reflected, whereas in the central portion 26b (2
4b), as shown in FIG.
The reflected light flux 35a directed toward the light receiving element 3
The light beam 35d is transmitted in the direction of 0. The central portion 26b (24b) also partially transmits the light flux 35c incident from the direction of the LED 27, and the transmitted light flux becomes the light flux 35a integrally with the subject light flux.

Since the central portion 26b (24b) is a semi-transparent portion as described above, the subject image is partially dark, but the central portion 26b (24b) is away from the focus of the objective lens 21. The contour is not conspicuous because of the presence of
When the reflectance is 50% or more, the decrease in the light amount is at a level where it is hardly noticeable.

As described above, the light beam 35d enters from the objective lens 21, passes through the central portion 26b (24b) of the joint surface between the second prism 24 and the auxiliary prism 26, and the light beam 35d.
By capturing the light emitted as described above by the light receiving element 30 via the condenser lens 31, the brightness of the subject can be measured. Since the finder optical system is used as the photometric optical system in this way, the light in the shooting direction can be accurately measured.

Instead of the light receiving element 30, it is possible to dispose a light projecting element at the same position. In this case, the light emitted from the light projecting element is the condenser lens 3
1, the auxiliary prism 26, the second prism 24, and the first prism 22 are sequentially passed, and the light is emitted from the objective lens 21 toward the subject. With such a configuration, since the light flux can be accurately directed to the subject, so-called active A
It can be used as the light emitted from F. It can also be used as a display while the self-timer is operating.

Next, the focus display using the above-described superimpose display will be described. This camera 1
Has an electronic distance measuring device 8 as described above, which enables automatic focus photography, but also has a focus adjustment ring 6 for manual focus adjustment. It is also possible. At this time, it is necessary to know the distance to the subject by some method, but the distance measuring device 8 is in charge of this, and the photographer can adjust the focus by a so-called focus aid method. This focus aid is the degree of matching between the information from the distance adjustment by manual operation and the information from the distance measuring means, that is, whether or not the current lens position or shooting distance setting value is in focus with respect to the subject. Refers to the electro-optical display. Moreover, the display referred to during the focus aid is observed near the distance measuring range frame 22a near the center of the field of view, and the focus adjustment state can be referred to at the same time while observing the subject.

An example in which this focus aid display is realized by superimposing will be described with reference to FIGS. As described above, since the photographing range frame 23 and the distance measuring range frame 22a for measuring the distance to the subject are located near the exit end face of the first prism 22, which is the image plane of the subject image by the objective lens 21, As shown in FIG. 6, it is possible to always observe with the subject. Furthermore, the above LCD
Since the display surface of 28 is also arranged at an optically equivalent position by the auxiliary prism 26 with respect to the exit end surface of the first prism 22 (see FIG. 4), the information displayed on the LCD 28 is also superimposed. It can be observed simultaneously with the subject image.

In the first embodiment, depending on the relationship between the focus adjustment ring 6 and the distance to the object, FIG.
The focus aid display is divided into five levels shown in (B), (C), (D), and (E).

That is, when the focus adjusting ring 6 has to be pivoted largely to the short distance side in order to focus on the distance to the object, the display elements widely separated as shown in FIG. 7 (A). The barrel indicators 28a and 28b are displayed, and when the focus adjustment ring 6 is slightly rotated toward the near side to bring the subject into focus, the indicator 2 which is slightly separated as shown in FIG. 7B.
8c and 28d are displayed, and indicators 28e and 2 are displayed in the focused state.
8f overlaps with the distance measurement range frame 22a, and FIG.
The state shown in is displayed, and when the focus adjustment ring 6 is rotated a little to the far side, when the focus is achieved, the index 28 which is slightly distant is displayed.
In the state shown in FIG. 7 (D) in which g and 28h are displayed, when the focus adjustment ring 6 is not greatly focused to the in-focus state, the markers 28i and 28j far apart are displayed. The states shown in 7 (E) are displayed.

How such a focus aid display changes when the focus is manually adjusted will be described with reference to FIG. As shown in FIG. 2, the distance measuring device 8 measures the distance between the subject and the camera 1 and stores the result (S1). Further, the focus adjustment ring position detection device 11
Reads the position of the focus adjustment ring 6 operated by the photographer (S2). Next, the arithmetic unit 12 collates the obtained information on the distance with the information on the position of the focus adjustment ring 6 to determine whether or not it is in focus, more specifically, whether or not it is within a certain allowable focus range (S3). .

When in focus, the arithmetic unit 12
By driving the LCD 28 included in the display device 13, FIG.
Is displayed (abbreviated as C in the figure) (S4), L
The ED 27 is turned on in green (S5). At this time, index 2
8e and the index 28f substantially coincide with the photographing distance measurement range frame 22a, and show a state of being in focus. Furthermore, here the color of the LED 27 has changed to a safety edge,
It really shows that it is in focus. If you shoot with the shutter released, you can get a focused photo.

On the other hand, if the position information of the focus adjustment ring 6 is not within a certain setting range for the distance measurement information and it is determined in step S3 that the focus is not achieved, further , Determine if it is far (S
7). If it is determined that the distance is not far (that is, close), it is determined whether the closeness is close within a certain range or close beyond this range (S8). When it is close beyond a certain range, the display shown in FIG. 7 (A) (abbreviated as A display in the figure) is performed (S10), and the LED 27 is lit in orange (S6). In this case, as described above, the index 28a and the index 28b are distant from each other, and the orange color indicates that the focus is out of focus. Step S8
Then, if it is determined that they are close within a certain range,
The display shown in (B) (abbreviated as B in the figure) is performed (S
9) Then, the LED 27 is also turned on in orange (S6). In this case, the index 28a and the index 28b are close to each other,
Indicates that the focus is adjusted to some extent.

On the other hand, when it is determined that the distance is far in step S7, it is determined whether the distance is far within a certain range or far beyond this range (S13). When it is far within a certain range, the display shown in FIG. 7D (abbreviated as D display in the figure) is performed (S11), and the LED 27 is lit in orange (S6). On the other hand, when it is determined that the distance is beyond a certain range, the display shown in FIG. 7E (abbreviated as E display in the figure)
(S12) is performed to clearly show that the indexes 28i and 28j are far apart from each other and are out of focus.

In the first embodiment, the degree of out-of-focus of the focus aid display is displayed in five stages. However, if it is displayed in more stages, the degree of focus can be understood in more detail. It goes without saying that it is good.

The color of light emitted from the LED 27 is not limited to the above orange and green, but may be, for example, those shown in FIGS.
In the state of (E), red light may be emitted. Alternatively, at the time of focusing or out of focus, even if at least one of display and / or illumination is made to blink, the meaning of the warning becomes clear and effective. Furthermore, the brightness of the LED 27 is
It is good to change according to the brightness of the surroundings. For example, in a bright place, bright light is emitted, and in a dark place, the light amount is reduced so as not to glare.

In the above embodiment, the display pattern is changed by using a transmissive LCD that displays a negative image as the LCD 28. However, if only a simple pattern is turned on / off or blinks, a material that does not pass light is used. If a hole having the shape of a display pattern is bored in or a transmission pattern is made of a photographic film or the like, it is possible to perform display with good contrast at low cost. Further, if a material that emits light by itself such as an LED array is used, it is possible to perform display without using a light emitting source such as the LED 27.

According to the first embodiment as described above, the characteristics of the real image type finder having a bright visual field are not impaired, and
A camera having a real-image viewfinder capable of displaying various information that changes depending on the situation near the center of the field of view can be provided.

FIG. 10 shows a second embodiment of the present invention. The second embodiment is different from the first embodiment in the shape of the focus aid display and is almost the same as the first embodiment. Therefore, only different portions will be mainly described.
As shown in the figure, with respect to a distance measuring range frame 22d having a substantially square shape with rounded corners, two upper and lower divided indexes 41a and 41b having a shape close to the shape of the frame are provided as four segments, totaling 8 segments in total. It consists of one segment.

In FIG. 10, only the three stages of A display, B display and C display are shown in FIG. 10 (A) and FIG.
0 (B) and FIG. 10 (C) respectively, the illustration is omitted, and like the example shown in FIG. 7,
Naturally, there are stages of D display and E display.

Further, in the first embodiment, as shown in FIG.
As shown in FIG. 7C, etc., the distance measurement range frame 22a
And each index 28a, 28b, 28c, 28d, 28e, 2
8f, 28g, 28h, 28i, and 28j were completely overlapped with each other or completely separated from each other. In the second embodiment, as shown in FIG. 10B, for example, as shown in FIG. It has the feature that it can represent a state where half overlap.

According to the second embodiment as described above, the index having the above-described shape has substantially the same effect as that of the first embodiment, and whether the outer shape of the distance measuring range frame 22d moves. It has the effect of looking like.

FIG. 11 shows a third embodiment of the present invention. The third embodiment is different in the shape of the focus aid display and is almost the same as the first and second embodiments. Therefore, only the different parts will be described.

In this embodiment, in order to make a strong impression of "index", the slightly elongated rectangular indexes 42a, 42b,
42c, 42d, 42e, 42f, 42g, 42h, etc. are used. Further, in order to enhance the impression that the degree of focusing is represented by “index”, the scale 43 is displayed at the same time as the distance measurement range frame 22d.

In the third embodiment, the number of stages showing the degree of focusing is increased more than in the first and second embodiments so that finer focusing and non-focusing information is displayed.
Note that, in FIG. 11, only four stages are shown for simplification.

According to the third embodiment, the same effect as that of the first and second embodiments described above can be obtained, and finer focusing and non-focusing states can be displayed in an intuitive manner. There is an effect that is done.

FIG. 12 shows a fourth embodiment of the present invention. The fourth embodiment is different in the shape of the focus aid display and is substantially the same as the first to third embodiments, so only the different portions will be mainly described.

In the fourth embodiment, the distance measuring range frame 22d
With respect to the rectangular index 43a fixed on the lower side, the indexes 43b, 43c, 43d provided on the upper side are sequentially displayed according to the focusing state. Note that, in FIG. 12, displays corresponding to the D display and the E display are omitted.

According to the fourth embodiment as described above, the same effects as those of the above-described first to third embodiments are obtained, and the index is not divided into both sides with respect to the fixed point, but one is right or left. Since it is configured so that it only moves, it has the advantage that it is easy to see if it is far or near.

FIG. 13 shows a fifth embodiment of the present invention. The fifth embodiment is different in the shape of the focus aid display and is almost the same as the first to fourth embodiments, so only the different portions will be mainly described.

In the fifth embodiment, the distance measuring range frame 22d
Vertically long rectangular segments, which are display elements and have almost the same vertical length as, are sequentially arranged from the left to the right of the distance measuring range frame 22d. Then, by displaying two adjacent ones of these segments at the same time, an index representing the focusing state is configured.

That is, when the focus adjustment ring 6 (see FIG. 1) has to be turned extremely greatly to the near distance side in order to focus on the distance to the object, FIG.
As shown in (O), the segments 44a and 44b are displayed, and when the focus adjustment ring 6 has to be rotated a little to the short distance side, the segments 44b and 44c are changed as shown in FIG. 13 (A). Displayed, focus ring 6
When the lens is focused by rotating it to the short distance side,
As shown in (B), the segments 44c and 44 are slightly separated from each other.
d is displayed and the segments 44d and 44e are in focus.
Overlaps the distance measurement range frame 22d and the state shown in FIG. 13C is displayed. Although illustration is omitted, it goes without saying that there are three more stages showing the case where the focus adjustment ring must be rotated to the far side.

According to the fifth embodiment as described above, the same effects as those of the above-mentioned first to fourth embodiments are obtained, and the index is composed of two segments, and the movement thereof is made to be one.
Since it is done in segment units, the movement of the index is 1/2
It has the advantage that the movement becomes smooth.

FIG. 14 shows a sixth embodiment of the present invention. The sixth embodiment is almost the same as the above-mentioned first embodiment, and therefore only different parts will be mainly described.

In the sixth embodiment, instead of using the light emitting source such as the LED 27 used in the first embodiment as an illumination device, natural light is used for illumination.

A reflecting mirror 51 tilted at an angle of about 45 degrees is arranged below the LCD 28 in the drawing, and a light collecting window 52 which is a light diffusing plate for scattering transmitted light is arranged slightly to the right front in the drawing. There is. Other configurations are almost the same as those described in FIG. 3 of the first embodiment.

The operation of the sixth embodiment is almost the same as that of the first embodiment, but the display of the LCD 28 is changed to the eyepiece lens 2.
When observing at 5, the light that has entered the daylighting window 52 and diffused is reflected upward by the reflecting mirror 51 and illuminates the LCD 28. Then, the transparent display portion on the LCD 28 is observed.

According to the sixth embodiment, the same effect as that of the first embodiment can be obtained, and if the surroundings are bright to some extent, it is possible to always observe with an appropriate brightness, and the illumination of the LED or the like is used. There is an advantage that a device can be dispensed with and the cost can be reduced.

Next, the LCD 28 is not limited to being arranged at a position optically equivalent to the exit end face of the first prism 22 which is the focus position of the objective lens 21. An example of such another arrangement will be described below.

FIG. 15 shows a seventh embodiment of the present invention. Since the seventh embodiment is almost the same as the first and sixth embodiments, only the different parts will be described.

In the seventh embodiment, the image of the LCD 28 is formed on the exit end surface of the first prism 22 which is the focal plane of the objective lens 21 (see FIG. 3) by using the lens 53.
To project through. The first prism 22
It goes without saying that the joint surface of the auxiliary prism 54 and the auxiliary prism 54 are coated with a total reflection mirror on the peripheral portion and a half mirror on the central portion, as in the first embodiment.

According to the seventh embodiment as described above, it has substantially the same operation and effect as those of the first and sixth embodiments.

16 and 17 show an eighth embodiment of the present invention. The eighth embodiment is almost the same as the first, sixth, and seventh embodiments described above, and therefore only different parts will be mainly described.

In the eighth embodiment, the auxiliary prism 56 is installed on the third reflecting surface of the second prism 24, and the LCD 28 is illuminated by the LED 27 from one end surface of the auxiliary prism 56.
Is displayed via the lens 57, while the auxiliary prism 5
The light is incident on the light receiving element 30 from the other end surface of 6 through the condenser lens 58 to perform photometry. The second
Needless to say, the joint surface between the prism 24 and the auxiliary prism 56 is coated with a total reflection mirror on the peripheral portion and a half mirror on the central portion, as in the first embodiment.

According to the eighth embodiment as described above, it has substantially the same operation and effect as those of the above-described first, sixth and seventh embodiments.

18 and 19 show a ninth embodiment of the present invention. The ninth embodiment is almost the same as the above-mentioned first, sixth, seventh and eighth embodiments, so that mainly different points will be described.

In the ninth embodiment, the auxiliary prism 61 is installed on the second reflecting surface of the second prism 24, and the LCD 28 is illuminated by the LED 27 from one end surface of the auxiliary prism 61.
Is displayed via the lens 62, while the auxiliary prism 6
The light is incident on the light receiving element 30 from the other end surface of 1 through the condenser lens 63 to perform photometry. The second
Needless to say, the joint surface between the prism 24 and the auxiliary prism 61 is coated with a total reflection mirror on the peripheral edge and a half mirror on the central edge, as in the first embodiment.

According to such a ninth embodiment, it has substantially the same operation and effect as the above-mentioned first, sixth, seventh and eighth embodiments.

The arrangement of the auxiliary prism and the projection lens as shown in FIG. 15, the arrangement of the auxiliary prism and the projection lens as shown in FIGS. 16 and 17, and the auxiliary as shown in FIGS. The arrangement of the prism and the projection lens, and the arrangement of the auxiliary prism as shown in FIG. 3 can be used in combination with each other.

[0061]

As described above, according to the present invention, it is possible to provide a camera having a focus aid display capable of recognizing the degree of in-focus or out-of-focus without separating the line of sight from the subject. .

[Brief description of drawings]

FIG. 1 is a perspective view showing the outer appearance of a camera according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of the camera of the first embodiment.

FIG. 3 is a perspective view showing a real image type finder of the first embodiment.

FIG. 4 is a side view showing the real image type finder of the first embodiment.

FIG. 5 is a perspective view showing a joint surface between the second prism and the auxiliary prism of the first embodiment.

FIG. 6 is a diagram showing a viewfinder field of the first embodiment.

FIG. 7 is a diagram showing focus-aid display in which the levels are classified according to the relationship between the focus adjustment ring and the distance to the subject in the first embodiment.

FIG. 8 is a diagram showing a display pattern of the LCD of the first embodiment.

FIG. 9 is a flowchart showing how the focus aid display of the first embodiment changes when the focus is manually adjusted.

FIG. 10 is a diagram showing a focus aid display according to a second embodiment of the present invention.

FIG. 11 is a diagram showing a focus aid display according to the third embodiment of the present invention.

FIG. 12 is a diagram showing a focus aid display according to a fourth embodiment of the present invention.

FIG. 13 is a diagram showing a focus aid display according to a fifth embodiment of the present invention.

FIG. 14 is a perspective view showing a real image finder according to a sixth embodiment of the present invention.

FIG. 15 is a perspective view showing a real image type finder according to a seventh embodiment of the present invention.

FIG. 16 is a plan view showing a real image type finder according to an eighth embodiment of the present invention.

FIG. 17 is a side view showing the real image type viewfinder of the eighth embodiment.

FIG. 18 is a plan view showing a real image finder according to a ninth embodiment of the present invention.

FIG. 19 is a side view showing a real image type viewfinder of the ninth embodiment.

FIG. 20 is a view showing a display in a viewfinder of a conventional real image type viewfinder.

[Explanation of symbols]

 1 ... Camera 22a, 22d ... Distance measurement range frame 28a, 28b, 28c, 28d, 28e, 28f, 28g, 28h, 28i, 28j ... Index 41a, 41b ... Index 42a, 42b, 42c, 42d, 42e, 42f, 42g , 42h… Indicator 43a, 43b, 43c, 43d… Indicator 44a, 44b, 44c, 44d, 44e… Segment

Claims (3)

[Claims] 1. A camera having a focus-aid display, wherein the focus-aid display is located substantially in the center of the viewfinder field when in focus, and when out of focus, the greater the degree of non-focus, the more outward from the center. A camera having a focus aid display, characterized by being displaced. 2. The focus-aid display is composed of a pair of display elements divided into upper and lower parts. The upper and lower display elements substantially coincide with each other at the approximate center of the viewfinder field when focused, and when they are out of focus. The camera with focus-aid display according to claim 1, wherein the upper and lower display elements move in mutually opposite directions as the degree of focus increases. 3. The focus-aid display is composed of a pair of display elements which are divided into upper and lower parts, and the upper and lower display elements substantially coincide with each other at the approximate center of the field of view of the viewfinder when focused, and when they are out of focus. The camera with the focus aid display according to claim 1, wherein one of the upper and lower display elements moves outward as the degree of focus increases.