JP5211822B2 - Optical parts and photographing apparatus - Google Patents

Description

  The present invention relates to an optical component and a photographing apparatus.

  Panning is used as a photographic technique for expressing the dynamic feeling of a subject, and is usually performed by a photographer shooting while shaking the camera in accordance with the moving direction of the moving subject. An electronic camera or the like that supports such panning has been proposed (see, for example, Patent Document 1). As a subject in panning, the main subject that moves almost coincident with the swing of the camera or other photographic device and is depicted as almost stationary, moves differently from the main subject, and moves in the direction of movement of the main subject. It is roughly divided into peripheral subjects that are blurred. Here, the peripheral subject behind the main subject when viewed from the photographing device side is not depicted overlapping with the main subject even if it is blurred, but it is between the photographing device and the main subject. When the surrounding subject is drawn in a blurred manner, the locus caused by the shake is drawn overlapping the main subject, which may adversely affect the description of the main subject.

JP 2006-80844 A

  The problem to be solved by the present invention is to provide an optical component and a photographing apparatus capable of performing suitable photographing.

According to the first aspect of the present invention, there is provided a light restricting member (410) for restricting light incident on the optical system (210), and the light restricting member (410) attached to the optical path (L1) of the optical system (210). Mounting portion (420), an input terminal (440) to which a signal indicating that the shooting state is a panning shot is supplied, and the optical system (during shooting ) when the signal is supplied to the input terminal. 210) and a control unit (430) for controlling the light limiting member (410) so as to limit the light incident on it at least once.

The invention of claim 2 is the optical component according to claim 1 , wherein the light limiting member (410) is a shutter.

According to a third aspect of the present invention, there is provided a photographing apparatus comprising the optical component according to the first or second aspect.

The invention of claim 4 determines that the light limiting member (410) for limiting the light incident on the optical system (210), the input unit (170) for inputting the timing of shooting, and the shooting state is panning. When the shooting state is determined to be panning by the determination unit and the shooting timing is input to the input unit, the light incident on the optical system is captured at least once during shooting. And a control unit (430) for controlling the light limiting member (410) so as to be limited.

The invention of claim 5 includes a light limiting member (410) for limiting light incident on the optical system (210), a mode setting unit (150) capable of setting a shooting mode including a light limiting mode, and a shooting state. A determination unit that determines that the image is shot, and the optical system when the determination unit determines that the shooting state is panning and the mode setting unit (150) sets the light limit mode. And a control unit (430) for controlling the light limiting member (410) so as to limit the light incident on (210) at least once during imaging.

A sixth aspect of the present invention is the photographing apparatus according to the fourth or fifth aspect , wherein the light limiting member (410) is an aperture or a shutter.

  In the present invention, it is possible to provide an optical component and a photographing apparatus that can perform suitable photographing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a main part configuration diagram showing a single-lens reflex digital camera 1 according to the present embodiment, and a part of the general configuration of the camera other than the configuration related to the optical component and the imaging apparatus of the invention is partially omitted. To do.

  The single-lens reflex digital camera 1 (hereinafter simply referred to as the camera 1) of the present embodiment includes a camera body 100 and a lens barrel 200, and the camera body 100 and the lens barrel 200 are detachable by a mount unit 300. Are combined. In addition, a liquid crystal shutter unit 400 is attached to the front end of the lens barrel 200 on the subject side.

  The lens barrel 200 incorporates a photographing optical system including a lens group 210 including a focus lens 211 and a zoom lens 212, an aperture device 220, and the like.

  The focus lens 211 is provided so as to be movable along the optical axis L <b> 1, and its position is adjusted by the lens driving motor 230 while its position is detected by the encoder 260.

  The aperture device 220 is configured such that the aperture diameter around the optical axis L1 can be adjusted in order to limit the amount of light beam that passes through the imaging optical system and reaches the image sensor 110 and to adjust the blur amount. . Adjustment of the aperture diameter by the aperture device 220 is performed by transmitting an appropriate aperture diameter calculated in the automatic exposure mode from the camera control unit 170 to the aperture drive unit 240 via the lens control unit 250, for example. Alternatively, the adjustment of the aperture diameter is transmitted from the camera control unit 170 to the aperture driving unit 240 via the lens control unit 250 by a manual operation by the operation unit 150 provided in the camera body 100. It is also done by. The aperture diameter of the aperture device 220 is detected by an aperture aperture sensor (not shown), and the current aperture diameter is recognized by the lens controller 250.

  As shown in FIG. 1, the liquid crystal shutter unit 400 includes a liquid crystal shutter 410 and a holding housing 420 that holds the liquid crystal shutter 410. The holding housing 420 that holds the liquid crystal shutter 410 is internally threaded, whereby the liquid crystal shutter unit 400 is detachably fixed to the tip of the lens barrel 200.

  The liquid crystal shutter 410 is a circular flat optical element using a polymer dispersion type liquid crystal, and changes the transmittance of the liquid crystal by changing the refractive index of the liquid crystal due to the voltage application of the transparent conductive film. The amount of light incident on the inside is controlled. Note that the liquid crystal shutter 410 mainly controls the amount of light incident on the camera 1 when performing shooting in a “dotted locus scan mode” described later. At the time of OFF, it is set to have a maximum transmittance.

  A liquid crystal shutter control unit 430 and a liquid crystal shutter side sync terminal 440 are provided in the holding housing 420. The liquid crystal shutter-side sync terminal 440 is electrically connected to the camera-side sync terminal 180 via the sync cord 500, and can receive signals from the camera control unit 170 provided in the camera body 100. Yes. Then, a signal from the camera control unit 170 is sent to the liquid crystal shutter control unit 430 via the liquid crystal shutter side sync terminal 440, and the liquid crystal shutter control unit 430 controls the operation of the liquid crystal shutter 410 based on the signal.

  The holding housing 420 is provided with a liquid crystal shutter speed setting member 450 for setting the shutter speed of the liquid crystal shutter 410 so that the shutter speed S of the liquid crystal shutter 410 can be set.

  As shown in FIG. 1, the camera body 100 includes a mirror system 120 for guiding a light beam from a subject to an image sensor 110, a finder 135, a photometric sensor 137, and a focus detection optical module 161. The mirror system 120 includes a quick return mirror 121 that rotates about a rotation axis 123 by a predetermined angle between the observation position and the shooting position of the subject, and the quick return mirror 121 pivotally supported by the quick return mirror 121. And a sub-mirror 122 that rotates according to the above.

  In FIG. 1, the state where the mirror system 120 is at the observation position of the subject is indicated by a solid line, and the state where the mirror system 120 is at the photographing position of the subject is indicated by a two-dot chain line. The mirror system 120 is inserted on the optical path of the optical axis L1 in the state where the subject is in the observation position, while rotating so as to retract from the optical path of the optical axis L1 in the state where the subject is in the photographing position.

  The quick return mirror 121 is composed of a half mirror, and in a state where the subject is at the observation position, the quick return mirror 121 reflects a part of the light flux (optical axes L2 and L3) from the subject (optical axis L1). Then, the light is guided to the finder 135 and the photometric sensor 137, and a part of the light beam (optical axis L4) is transmitted and guided to the sub mirror 122. On the other hand, the sub mirror 122 is constituted by a total reflection mirror, and guides the light beam (optical axis L4) transmitted through the quick return mirror 121 to the focus detection optical module 161.

  Therefore, when the mirror system 120 is at the observation position, the light beam (optical axis L1) from the subject is guided to the finder 135, the photometric sensor 137, and the focus detection optical module 161, and the subject is observed and exposed. Calculation and detection of the focus adjustment state of the focus lens 211 are executed. Then, when the photographer presses the release button, the mirror system 120 rotates to the photographing position, the light beam (optical axis L1) from the subject is guided to the image sensor 110, and the photographed image data is stored in a memory (not shown). In addition, a shutter 111 is provided in front of the image sensor 110, so that the light flux (optical axis L1) from the subject can be limited. In addition, as will be described later, when the liquid crystal shutter 410 restricts the light beam from entering the lens barrel 200, shooting is not performed.

  The image sensor 110 is fixed on the camera body 100 at a position on the optical axis L1 of the light flux from the subject and serving as a planned focal plane of the photographing optical system 210. The imaging element 110 is a two-dimensional array of a plurality of photoelectric conversion elements, and can be configured by a two-dimensional CCD image sensor, a MOS sensor, a CID, or the like. The electrical image signal photoelectrically converted by the image sensor 110 is subjected to image processing by the camera control unit 170 and then stored in a memory (not shown). Note that the memory for storing the photographed image can be constituted by a built-in memory or a card-type memory.

  On the other hand, the subject light reflected by the quick return mirror 121 forms an image on a focusing screen 131 disposed on a surface optically equivalent to the image sensor 110, and the photographer's light passes through the pentaprism 133 and the eyepiece 134. Guided to the eyeball. At this time, the transmissive liquid crystal display 132 superimposes and displays a focus detection area mark on the subject image on the focusing screen 131, and information relating to shooting such as a shutter speed, an aperture value, and the number of shots in an area outside the subject image. Is displayed. As a result, the subject, its background, photographing related information, and the like can be observed through the finder 134 in a state where the release is not performed.

  In addition, a photometric lens 136 and a photometric sensor 137 are provided in the vicinity of the eyepiece lens 134 to receive part of the subject light imaged on the focusing screen 131. That is, the camera 1 of this embodiment employs a through-the-lens side light system.

  The photometric sensor 137 is composed of a two-dimensional color CCD image sensor or the like, and divides the photographing screen into a plurality of regions and outputs a photometric signal corresponding to the luminance of each region in order to calculate an exposure value at the time of photographing. The photometric signal detected by the photometric sensor 137 is output to the camera control unit 170 and used for exposure control.

  The operation unit 150 is a shutter release button or an input switch for the photographer to set various operation modes of the camera 1, and switches between “auto focus mode / manual focus mode” and selects “dotted line locus panning mode”. Is to be done.

  The camera body 100 is provided with a camera control unit 170. The camera control unit 170 includes peripheral components such as a microprocessor and a memory, and is electrically connected to the lens control unit 250 through an electric signal contact unit provided in the mount unit 300, and receives lens information from the lens control unit 250. At the same time, information such as the defocus amount and aperture diameter is transmitted to the lens controller 250. Furthermore, the camera control unit 170 operates the liquid crystal shutter unit 400 by sending various signals such as a release signal to the liquid crystal shutter unit 400 via the sync terminal 180. The camera control unit 170 reads out image information from the image sensor 110 as described above, performs predetermined information processing as necessary, and outputs the information to a memory (not shown). The camera control unit 170 controls the entire camera 1 such as correction of captured image information and detection of a focus adjustment state and an aperture adjustment state of the lens barrel 200.

  The focus detection optical module 161 is fixed on a position on the optical axis L4 of the light beam reflected by the sub mirror 122 and optically equivalent to the image pickup surface of the image pickup device 110, and has a phase difference using the subject light. Performs automatic focusing control based on the detection method.

  The AF-CCD control unit 162 controls the gain and accumulation time of the line sensor of the focus detection optical module 161 in the autofocus mode, and receives information on the focus detection area selected as the focus detection position from the camera control unit 170. The pair of image signals detected by the pair of line sensors corresponding to the focus detection area are read out and output to the defocus calculation unit 163.

  The defocus calculation unit 163 converts the shift amount of the pair of image signals sent from the AF-CCD control unit 162 into a defocus amount ΔW, and outputs this to the lens drive amount calculation unit 164.

  The lens drive amount calculation unit 164 calculates a lens drive amount Δd corresponding to the defocus amount ΔW based on the defocus amount ΔW sent from the defocus calculation unit 163, and supplies this to the lens drive control unit 165. Output. Then, when the lens driving amount Δd is transmitted to the lens control unit 280, the position of the focus lens 211 is adjusted by the lens driving motor 250.

  Next, the operation will be described.

  FIG. 2 is a flowchart showing the operation of the camera 1 according to the present embodiment in the “dotted line locus panning mode”, and FIG. 3 shows the transmittance of the light beam (optical axis L1) by the liquid crystal shutter 410 and the exposure time in the present embodiment. It is a graph which shows an example of a relationship.

  In the following, an operation in the case where the setting of the camera 1 is in the “dotted line locus panning mode” will be described. As shown in FIG. 3, in the present embodiment, when the setting of the camera 1 is “dotted locus trajectory shooting mode”, the transmittance of the liquid crystal shutter 410 is changed, whereby the image sensor in the camera 1 is changed. The amount of the light beam (optical axis L1) guided to 110 is periodically changed.

  Here, in the example shown in FIG. 3, the transmittance of the liquid crystal shutter 410 is changed in a rectangular wave shape with a period T at the shutter speed S (the time from the start of exposure to the end of exposure). Specifically, in the example shown in FIG. 3, the liquid crystal shutter 410 transmits the light beam (optical axis L1) at the maximum transmittance for each period T, and the transmittance = 0, that is, the light beam (optical axis). The state where L1) is not transmitted at all is sequentially repeated.

  First, in step S1, it is determined whether or not the setting of the camera 1 is set to “dotted line locus panning mode”. If it is set to “dotted line locus panning mode”, it is set to “dotted line locus panning mode”. A signal to that effect is sent from the camera control unit 170 to the liquid crystal shutter control unit 430 via the camera side sync terminal 180, the sync cord 500, and the liquid crystal shutter side sync terminal 440. On the other hand, if the “dotted line locus panning mode” is not set, the operation is repeated until the “dotted line locus panning mode” is set.

  Next, in step S2, the camera control unit 170 of the camera body 1 determines the exposure before starting the exposure so that the predetermined exposure value EV is obtained. Exposure is performed based on a photometric signal detected by the photometric sensor 137. Here, the exposure value EV correlates with the shutter speed TV of the image sensor 110 and the aperture stop AV of the aperture device 220, and the relationship EV = TV + AV is generally established. Therefore, when the setting of the camera 1 is the shutter speed priority mode or when the shutter speed is set in the manual mode, the exposure is determined mainly by adjusting the aperture stop of the aperture device 220. In the “dotted locus panning mode”, the transmittance of the liquid crystal shutter 410 periodically changes as shown in FIG. 3, and in the example shown in FIG. It is about half the transmittance (that is, the average transmittance shown in the figure). Therefore, in the example shown in FIG. 3, the amount of light incident into the camera 1 is also about half, and as a result, the exposure amount is reduced. Therefore, when the camera controller 170 determines the exposure, It is desirable to perform exposure correction in consideration of the average transmittance by the liquid crystal shutter 410.

  Then, the photometry signal detected by the photometry sensor 137 and the shutter speed TV set by the camera control unit 170 are transmitted from the camera control unit 170 via the camera side sync terminal 180, the sync cord 500, and the liquid crystal shutter side sync terminal 440. It is sent to the liquid crystal shutter controller 430. The shutter speed TV set by the camera control unit 170 is transmitted from the liquid crystal shutter control unit 430 to the liquid crystal shutter speed setting member 450. The liquid crystal shutter speed setting member 450 sets the shutter speed S of the liquid crystal shutter based on the shutter speed TV. Set.

  Next, the process proceeds to step S3, and when the release button is depressed by the photographer, the mirror system 120 moves to the photographing position, exposure starts, and from the camera control unit 170, the camera-side sync terminal 180, the sync cord 500, the liquid crystal. An exposure start signal is sent to the liquid crystal shutter control unit 430 via the shutter side sync terminal 440 (step S4).

  In the present embodiment, in addition to determining exposure by the camera control unit 170 based on a photometric signal detected by the photometric sensor 137 before the start of exposure, photometry detected by the photometric sensor 137 during exposure. Even when the signal changes, the shutter speed TV of the image sensor 110 and the shutter speed S of the liquid crystal shutter 410 are corrected so that the exposure amount of the image sensor 110 becomes an appropriate value together with the change of the photometric signal. good. Alternatively, the exposure speed of the image sensor 110 is determined by determining and correcting the shutter speed S of the liquid crystal shutter 410 based on the photometric signal detected by the photometric sensor 137 during the exposure without determining the exposure before starting the exposure. The setting may be such that the exposure is terminated when a predetermined value is reached. In this case, the photometry signal detected by the photometry sensor 137 and the shutter speed TV set by the camera control unit 170 are continuously sent from the camera control unit 170 to the liquid crystal shutter control unit 430 even during exposure. .

  Next, in step S5, an operation start signal is transmitted from the liquid crystal shutter control unit 430 to the liquid crystal shutter 410, and the liquid crystal shutter 410 is operated. For example, in the example shown in FIG. 3, based on the shutter speed S of the liquid crystal shutter set by the shutter speed setting member 450, the liquid crystal shutter 410 has a rectangular wave shape (period T) from the start of exposure to the end of exposure. Change the transmittance. Specifically, the liquid crystal shutter 410 sequentially repeats the operation of maintaining the maximum transmittance state under the condition of time t and then maintaining the state of transmittance = 0 under the condition of time T−t.

  The change period T of the liquid crystal shutter 410 is obtained by T = S / N based on the shutter speed S and a preset constant N. Here, the constant N is a predetermined value set in advance, but the photographer may be able to change the setting as appropriate by an operation unit (not shown) provided in the liquid crystal shutter unit 400. Further, the time t when the transmittance of the liquid crystal shutter 410 is maximum in the period T is normally set to a time about half of the period T, but the operation unit (not set) provided in the liquid crystal shutter unit 400 is set. The photographer may be able to change the settings as appropriate using the operation unit 150 of the camera body 100 or the camera body 100. By changing the time t, the duty ratio D (D = t / T) of the liquid crystal shutter 410 can be controlled.

  Finally, the exposure is finished (step S6).

  According to the present embodiment, in order to operate the liquid crystal shutter 410 as described above, for example, when a light source is interposed between the automobile and the camera 1 as shown in FIG. When panning is performed, as shown in FIG. 4B, the shooting trajectory of the light source can be depicted in a state of being shaken in a broken line shape. By operating the liquid crystal shutter 410, the exposure / non-exposure state is repeated, so that the shooting trajectory of the light source can be changed to a broken line as shown in FIG. 4B. The adverse effect on the subject car can be alleviated. That is, even if a peripheral subject exists between the imaging device such as a camera and the main subject, it is possible to reduce an adverse effect on the depiction of the main subject due to the blurring of the peripheral subject. 4A is a diagram showing an example of a scene to which the “dotted trajectory panning mode” according to the present embodiment is applied, and FIG. 4B is a diagram illustrating the “dotted trajectory panning mode according to the present embodiment. It is a figure which shows the image obtained by applying "."

  On the other hand, when the liquid crystal shutter 410 according to the present embodiment is not used, as shown in FIG. 4C, the shooting trajectory of the light source is linear and overlaps on the automobile that is the main subject. End up. FIG. 4C is a diagram showing an image obtained in conventional panning. On the other hand, according to the present embodiment, even when the light source is interposed between the automobile and the camera 1 as described above, such adverse effects can be mitigated.

  In the example shown in FIG. 3, the liquid crystal shutter 410 has a configuration in which the transmittance changes in a rectangular wave shape, but may have a configuration in which the transmittance changes in a sine wave shape as shown in FIG. Here, FIG. 5 is a graph showing the relationship between the transmittance of the light beam (optical axis L1) by the liquid crystal shutter 410 and the exposure time in another example of this embodiment. By adopting a configuration in which the transmittance of the liquid crystal shutter 410 is changed in a sine wave shape, the time during which the transmittance of the liquid crystal shutter 410 is zero can be extremely shortened. Even when there is a slight opening between the main subject and the moving speed of the main subject, it is possible to prevent the main subject from being drawn overlapping the frame feed.

In the example shown in FIG. 3, the period T is constant at T = S / N, but the period T is changed when a change occurs in the angular velocity of the camera 1 during the panning of the photographer. It is good also as a simple structure. In other words, according to the angular velocity ω output from the angular velocity sensor to the liquid crystal shutter control unit 430, the period T may be changed as shown in FIG. Here, the angular velocity sensor may be provided in the liquid crystal shutter unit 400, or an angular velocity sensor (not shown) provided in the camera body 100 may be used to send an angular velocity signal from the camera body 100 to the liquid crystal shutter unit. It is good also as a simple structure. FIG. 6 is a graph showing the relationship between the exposure time and the transmittance of the light beam (optical axis L1) by the liquid crystal shutter 410 and the angular velocity of the camera 1 in another example of the present embodiment. In FIG. 6, the initial period and angular velocity are T ₀ and ω _0, and the period and angular velocity after the change in angular velocity are T ₁ and ω ₁ .
T = T × T ₀ (ω / ω ₀ ) (1)

  As described above, by adopting a configuration in which the period T is changed in accordance with the angular velocity ω, for example, even when the main subject for panning is accelerated or decelerated, it is possible to perform good shooting. .

Alternatively, in the example shown in FIG. 3, the period T is constant at T = S / N. However, the period T may be gradually increased as time elapses from the start of exposure. That is, according to the following formula (2), as shown in FIG. 7, the period T may be gradually increased. FIG. 7 is a graph showing the relationship between the transmittance and period T of the light beam (optical axis L1) by the liquid crystal shutter 410 and the exposure time in another example of the present embodiment. In the following equation (2), the initial period and the angular velocity T _0, the time from start of exposure and t _e, alpha is a predetermined constant.
_{T = T 0 + α × t} e ... (2)

  As described above, by gradually increasing the period T with the passage of time from the start of exposure, as shown in FIG. 8, the shooting trajectory of the light source is changed to a broken line shape with a gradually increasing pitch. Even if the main subject is an automobile traveling at a constant speed, it is possible to produce a depiction of acceleration. FIG. 8 is a view showing an image obtained by applying the “dotted line locus panning mode” according to the present embodiment.

Furthermore, in addition to gradually increasing the period T with the passage of time from the start of exposure, the period T may be changed according to the angular velocity ω as described above. That is, you may employ | adopt the structure which calculates | requires the period T according to following formula (3).
_{T = T 0 + α × t} e × (ω / ω 0) ... (3)

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, in the above-described embodiment, an example in which the present invention is applied to a single-lens reflex digital camera has been described. However, the present invention is not particularly limited to this, and a compact camera, a video camera, a still camera, a mobile phone camera, The present invention may be applied to other optical devices such as a single-lens reflex camera using a silver salt film.

  Further, the liquid crystal shutter unit 400 may further include an angular velocity sensor. By adopting the configuration having the angular velocity sensor, for example, when panning is not performed at a certain angular velocity or higher, it is possible to perform control so that the liquid crystal shutter 410 does not operate. The malfunction of 410 can also be prevented. Furthermore, the liquid crystal shutter unit 400 is configured to include an angular velocity sensor, and the liquid crystal shutter unit 400 is provided with a panning mode determination unit that determines whether or not the panning mode is set, whereby the liquid crystal shutter 410 transmits the light beam (optical axis L1). It can also be configured to automatically control the rate.

  In the above-described embodiment, the camera control unit 170 is configured to transmit a photometry signal, shutter speed TV, or angular velocity signal in addition to the exposure start signal to the liquid crystal shutter unit 400. Only the exposure start signal may be transmitted to the liquid crystal shutter unit 400. In this case, the liquid crystal shutter unit 400 is preferably provided with a photometric device and an angular velocity sensor.

  Alternatively, in the above-described embodiment, the mode in which the light entering the camera 1 is controlled using the liquid crystal shutter 410 is illustrated. However, instead of the liquid crystal shutter 410, FIGS. 9A and 9B are used. A neutral density filter 600 as shown may be used. FIG. 9A is a front view of the neutral density filter 600, and FIG. 9B is a side view of the camera 1 with the neutral density filter 600 attached.

  As shown in FIG. 9B, the neutral density filter 600 is detachably attached to the tip of the lens barrel 200 of the camera 1, and as shown in FIG. 9A, the neutral density filter 600 has its circumference. In the direction, transmissive regions 610 that transmit light and non-transmissive regions 620 that do not transmit light are alternately provided. Then, by rotating by the motor 630, the transmissive regions 610 and the non-transmissive regions 620 can be alternately arranged on the front surface of the lens barrel 200, whereby the exposure / non-exposure state can be repeated. In FIG. 9A, the neutral density filter 600 is divided into four regions, and a transmission region 610 and a non-transmission region 620 are arranged. However, the number of divisions is not limited to four, and 5 It may be divided into the above regions, or may be divided into three or less regions. Further, in addition to the transmissive region 610 and the non-transmissive region 620, a semi-transmissive region may be provided, and further, a configuration in which the transmittance gradually changes may be employed.

  Further, in the above-described embodiment, the example in which the liquid crystal shutter 410 is disposed at the tip of the lens barrel 200 has been described. However, the liquid crystal shutter 410 may be disposed inside the lens barrel 200. In this case, the liquid crystal shutter 410 can be controlled by the lens control unit 250, whereby more advanced synchronization and mutual communication can be performed between each function of the camera 1 and the liquid crystal shutter 410. Further, by disposing the liquid crystal shutter 410 inside the lens barrel 200, the liquid crystal shutter 410 can also be used as an aperture or a shutter mechanism.

FIG. 1 is a main part configuration diagram showing a single-lens reflex digital camera according to the present embodiment. FIG. 2 is a flowchart showing the operation of the camera according to the present embodiment in the “dotted trajectory panning mode”. FIG. 3 is a graph showing an example of the relationship between the light transmittance of the liquid crystal shutter and the exposure time in the present embodiment. FIG. 4A is a diagram showing an example of a scene to which the “dotted trajectory panning mode” according to the present embodiment is applied, and FIG. 4B is an application of the “dotted trajectory panning mode” according to the present embodiment. FIG. 4C is a diagram showing an image obtained by conventional panning. FIG. 5 is a graph showing the relationship between the light transmittance of the liquid crystal shutter and the exposure time in another example of this embodiment. FIG. 6 is a graph showing the relationship between the light transmittance by the liquid crystal shutter, the angular velocity of the camera, and the exposure time in another example of the present embodiment. FIG. 7 is a graph showing the relationship between the exposure time and the light transmittance and cycle of the liquid crystal shutter in another example of this embodiment. FIG. 8 is a view showing an image obtained by applying the “dotted line locus panning mode” according to the present embodiment. FIG. 9A is a front view of the neutral density filter, and FIG. 9B is a side view of the camera with the neutral density filter attached.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Single-lens reflex digital camera 100 ... Camera body 110 ... Image pick-up element 170 ... Camera control part 200 ... Lens barrel 210 ... Lens group 220 ... Aperture apparatus 250 ... Lens control part 400 ... Liquid crystal shutter unit 410 ... Liquid crystal shutter 420 ... Holding housing Body 430 ... Liquid crystal shutter controller

Claims (6)

A light limiting member for limiting light incident on the optical system;
An attachment portion for attaching the light limiting member to the optical path of the optical system;
An input terminal to which a signal indicating that the shooting state is panning is supplied;
And a control unit that controls the light limiting member so as to limit light incident on the optical system at least once during photographing when the signal is supplied to the input terminal. . The optical component according to claim 1 ,
The optical component, wherein the light limiting member is a shutter. A photographing apparatus comprising the optical component according to claim 1 . A light limiting member for limiting light incident on the optical system;
An input unit for inputting shooting timing;
A determination unit that determines that the shooting state is panning;
When the determination unit determines that the shooting state is panning and the shooting timing is input to the input unit, the light incident on the optical system is limited at least once during shooting. And a control unit that controls the light limiting member. A light limiting member for limiting light incident on the optical system;
A mode setting unit capable of setting shooting modes including a light limiting mode;
A determination unit that determines that the shooting state is panning;
When the determination unit determines that the shooting state is panning and the mode setting unit is set to the light limiting mode, the light incident on the optical system is limited at least once during shooting. And a control unit for controlling the light limiting member. The imaging device according to claim 4 or 5 , wherein
The photographing apparatus, wherein the light limiting member is an aperture or a shutter.

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