JP5451058B2 - IMAGING DEVICE, IMAGING DEVICE CONTROL METHOD, IMAGING DEVICE CONTROL PROGRAM - Google Patents

Description

  The present invention relates to an imaging apparatus having a magnification changing mechanism that can be driven to change magnification during exposure, an imaging apparatus control method, and an imaging apparatus control program.

Inter-exposure magnification photography (so-called inter-exposure zoom photography) has been widely known as an imaging technique for obtaining a special effect that flows radially around an image. However, performing a zooming operation during exposure requires a very advanced technique and requires skill. From such a background, as disclosed in Patent Document 1, there is a disclosure of a technique for performing power scaling and synchronizing with exposure timing. Further, in order to take advantage of the shooting effect of exposure variable magnification, when the main subject is photographed with the center of the screen, an effect that makes the main subject stand out can be obtained. Therefore, Patent Document 2 discloses a technique of performing zooming after exposure for a certain period in order to expose an image having a main subject as a core.
Japanese Examined Patent Publication No. 7-23949 Japanese Patent No. 3103620

  However, recent camera lens barrels with an autofocus function are varifocal lenses with a focus cam omitted to reduce the thickness when retracted or to reduce the diameter of the lens barrel. There are many. Among the lens barrels configured as described above, there is a lens barrel in which the amount of extension of the lens barrel during zooming is temporarily shortened in the vicinity of the middle between the telephoto end and the wide-angle end of zooming. At this time, after the zooming operation is stopped, an operation of removing the backlash of the zooming mechanism is performed on the feeding side according to the driving direction and the zooming stop position so that the lens barrel does not retract even if it is pushed from the front of the lens barrel. A control method is known.

  However, when continuously performing variable magnification shooting between exposures with the lens barrel having the above-described configuration, there has been a problem that the shooting response is reduced due to the backlash removal operation of the variable magnification mechanism. There is also a problem that the angle of view changes due to the play-off operation on the live view screen. Further, in the vicinity of the inflection point where the lens barrel feed amount increases or decreases during zooming, there is a case where the influence of the play and the lens eccentricity due to the increase of the mechanical load is likely to occur, and the captured image may be adversely affected. Furthermore, when the exposure ends, the shutter must also be operated. Therefore, if the inrush current time for zooming operation and the shutter drive overlap, the lower limit voltage required for the camera is reduced due to the power supply voltage drop. There was a risk of falling below.

  It is an object of the present invention to easily obtain a desired photographing effect without taking into consideration the backlash of a magnification changing mechanism and minimizing the power supply voltage drop of the camera when performing variable magnification shooting between exposures. An imaging apparatus, an imaging apparatus control method, and an imaging apparatus control program are provided.

An image pickup apparatus according to a first aspect of the present invention includes a shooting start instruction unit, a zoom lens control unit that controls driving of a variable focal length variable lens, and a shutter that controls a shutter that can block a light beam. The control means, the zoom start position storage means for storing the drive start position of the zoom lens, and the zoom lens moved from the drive start time of the zoom lens to exceed the inflection point of the feed amount. The time until the start of exposure for imaging recording at the position or the driving start position of the zoom lens moves from the position where the zoom lens moves and exceeds the inflection point of the feed amount for imaging and recording. an exposure starting condition storage means for storing the amount of movement to a position for starting the exposure, the shutter control unit shutter by controlling the timing for blocking the light beam by the photographing start instruction before the result of photometry of the operation means Exposure control means for controlling the exposure time for the imaging device determined in step S3, and the zoom lens control means zooms from the drive start position of the zoom lens stored in the zoom start position storage means. It starts driving, the exposure control means, after the operation of the shooting start instructing means, after the zoom drive the exposure starting condition storage unit from the start of the lapse of the time stored, or the zoom start the moving amount of the exposure start condition storing means stores the position after the variable power lens is moved, starts the exposure for imaging the recording, and the variable power lens even after the start of exposure moves while you are the shutter intercepts the light beam by the shutter control unit drives out elapsed exposure time determined by the previous result of photometry of the operation the shooting start instructing means, said zoom lens control means, an exposure end Wherein the stopping the driving of the zooming lens after.

According to a second aspect of the present invention, there is provided a method for controlling an imaging apparatus comprising: an imaging start instruction unit; a variable magnification lens control unit that controls driving of a variable focal length variable lens; and a shutter that can block a light beam. A shutter control means for controlling, a zoom start position storage means for storing a drive start position of the zoom lens, and an inflection point of the feed amount by moving the zoom lens from the drive start time of the zoom lens; The time until the start of exposure for imaging and recording at a position beyond the position , or from the driving start position of the variable magnification lens, the variable magnification lens moves and exceeds the inflection point of the feed amount Exposure start condition storage means for storing the amount of movement to the position at which exposure for starting is performed, and the timing at which the shutter blocks the light beam by the shutter control means, so that measurement before the operation of the imaging start instruction means is performed. An exposure control means for controlling an exposure time for the image sensor determined by the light result, the control method of the imaging apparatus, from the drive start position of the zoom lens stored in the zoom start position storage means start the zooming drive, after the operation of the shooting start instructing means, after the zoom drive the exposure starting condition storage unit from the start of the lapse of said time of storing or the exposure from the zoom start position the moving amount of the starting condition storage means for storing after said variable power lens is moved, starts the exposure for image-recording by the exposure control means, the variable power lens is moved even after the start of exposure during and has the shutter intercepts the light beam by the shutter control unit drives out course of the determined exposure time by a previous result of photometry of the operation the shooting start instructing means, said zoom lens system Means by, characterized in that it stops the driving of the zooming lens after completion of exposure.

An image pickup apparatus control program according to a third aspect of the present invention is capable of blocking a light beam from a computer, a photographing start instruction means, a variable magnification lens control means for controlling driving of a variable focal length variable magnification lens, and a light beam. A shutter control means for controlling an appropriate shutter, a zoom start position storage means for storing the drive start position of the zoom lens, and the zoom lens moves from the start of driving of the zoom lens to adjust the amount of extension. The time until the start of exposure for imaging / recording at a position beyond the inflection point , or the variable magnification lens moves from the drive start position of the variable magnification lens and exceeds the inflection point of the feed amount. an exposure starting condition storage means for storing the amount of movement to a position for starting the exposure for the image-recording Te, by controlling the timing of the shutter blocks the light beam by the shutter control means, the imaging start An imaging apparatus control program for functioning as an exposure control means for controlling an exposure time for an image sensor determined by a photometric result before an operation of an indicating means, wherein the zoom lens control means is a zoom start position the starts zooming drive from a drive start position of the variator lens, after the operation of the prior SL photographing start instruction means, the time during which the exposure start condition storage unit from the start of the zooming drive to store the storage means stores after There has elapsed, or the moving amount of the exposure start condition storing means for storing from said variable power start position after said variable power lens is moved, it starts the exposure for image-recording by the exposure control means The exposure time determined after the exposure time determined by the photometric result before the operation of the imaging start instructing means after the start of the exposure and while the zoom lens is moving is shown in FIG. Tsu intercepts shutter the light flux by motor control means, by the variable magnification lens control unit, characterized in that stops the driving of the zooming lens after completion of exposure.

  According to the present invention, when performing inter-exposure variable shooting continuously, anyone can easily perform inter-exposure variable shooting without being conscious of the troublesome play of the variable magnification mechanism.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In addition, each figure shown below is the figure shown typically, and in order to make an understanding easy, the magnitude | size and shape of each part are exaggerated suitably. In the following description, specific numerical values, configurations, operations, and the like are shown and described, but these can be changed as appropriate.

(Embodiment)
FIG. 1 is a diagram showing a system configuration of an embodiment of an imaging apparatus according to the present invention. The variable magnification lens 101 is a first group lens, and performs magnification change (focal length change) by changing the position in the optical axis direction. In general, the term “zoom” is often used for operations and mechanisms that change the focal length. On the other hand, there are cases where “zoom” and “varifocal” are properly used depending on whether or not the focal position is moved by changing the focal length. In the present specification, as a general term for these, a change in focal length by a lens barrel having a variable focal length is referred to as “magnification”. The variable power drive control unit 109 controls the variable power drive of the variable power lens 101. The shutter / aperture unit 102 has a function of a shutter that blocks a photographing light beam and a diaphragm that controls the amount of light of the photographing light beam. The shutter / aperture unit drive control unit 110 controls the drive of the shutter / aperture unit 102. The shift lens 103 is a second group lens, and is a shake correction optical system that can change the position on a plane substantially perpendicular to the optical axis. The shift lens drive control unit 111 controls the drive of the shift lens 103. The focus lens 104 is a third group lens, and performs focus adjustment capable of changing the position in the optical axis direction. The focus drive control unit 112 controls the drive of the focus lens 104.

  The image sensor 105 converts an optical image that has passed through each lens group into an electrical signal. The imaging signal processing unit 106 converts the electrical signal output from the imaging element 105 into a video signal. The video signal processing unit 107 processes the video signal output from the imaging signal processing unit 106 according to the application. The display unit 108 displays an image as necessary based on the signal output from the video signal processing unit 107. The display control unit 113 controls the operation and display of the image sensor 105 and the display unit 108. The control unit 118 controls the entire system. The control unit 118 also has a function as an exposure control unit that controls exposure. The power supply unit 114 supplies power to the entire system according to the application. The external input / output terminal unit 115 inputs / outputs communication signals and video signals to / from the outside. The operation unit 116 is various operation members for operating the system. The storage unit 117 stores and records various data such as video information.

  Next, the operation of the imaging apparatus having the above configuration will be described. The operation unit 116 includes a shutter release button configured such that a first switch (hereinafter referred to as SW1) and a second switch (hereinafter referred to as SW2) are sequentially turned on in accordance with the pressing amount. SW1 is turned on when the shutter release button is depressed approximately half, and SW2 is turned on when the shutter release button is depressed to the end. When SW1 of the operation unit 116 is turned on, the focus drive control unit 112 drives the focus lens 104 to perform focus adjustment, and the shutter / aperture unit drive control unit 110 drives the shutter / aperture 102 to perform appropriate exposure. Set to quantity. Further, when SW2 is turned on, image data obtained from the light image exposed to the image sensor 105 is stored in the storage unit 117.

  At this time, if there is an instruction to turn on the shake correction function from the operation unit 116, the control unit 118 of the entire system instructs the shift lens drive control unit 111 to perform the shake correction operation. The shift lens drive control unit 111 that has received an instruction from the control unit 118 performs a shake correction operation until an instruction to turn off the shake correction function is given. When the operation unit 116 has not been operated for a certain period of time, the control unit 118 of the entire system issues an instruction to shut off the power source of the display unit 108 for power saving.

  If there is an instruction for zooming by the zoom lens 101 to the operation unit 116, the zoom drive control unit 109 that has received the instruction via the control unit 118 of the entire system drives the zoom lens 101, The magnification lens 101 is moved to the designated magnification position. At the same time, based on the image information processed by the signal processing units 106 and 107 sent from the image sensor 105, the focus drive control unit 112 drives the focus lens 104 to perform focus adjustment.

  FIG. 2 is a detailed block diagram of the zoom drive control unit 109 and the focus drive control unit 112. A variable power motor 201 performs a zooming operation of the variable power lens 101. The variable power motor driving circuit 202 is an analog circuit that drives the variable power motor 201. A zooming reset position detection unit 203 detects a reset position of the zooming lens 101 and acquires a zooming reference position. The zoom position detector 204 detects the absolute position of the zoom lens 101. The zooming control unit 205 controls the zooming movement amount in accordance with the output of the zooming position detection unit 204, and the control variable rotates the zooming motor 201 via the zooming motor drive circuit 202 to change the zooming amount. The double lens 101 moves. The between-exposure scaling control unit 206 operates in cooperation with the scaling control unit 205 to perform a scaling driving operation during exposure.

  The focus motor 207 operates the focus lens 104. The focus motor drive circuit 208 is an analog circuit that drives the focus motor 207. The focus reset position detection unit 209 acquires a focus reference position. The focus control unit 210 controls the focus movement amount. The focus position detection unit 211 drives the focus lens 104 to detect the focus position of the subject from the image exposed by the image sensor 105. The zooming start position storage unit 212 is a part of the during-exposure zooming control unit 206, and stores a zooming start position at which the driving of the zooming lens 101 is started. The exposure start time storage unit 213 is a part of the control unit 118 and functions as an exposure start condition storage unit that stores the time from the start of driving of the zoom lens 101 to the start of exposure for imaging recording.

  Next, the inter-exposure variable magnification mode, the inter-exposure variable magnification photographing sequence, and the stop control method for the variable magnification lens 101 will be described with reference to FIGS. The between-exposure magnification mode is a photographing mode for obtaining a special effect that flows radially from the center of the image to the peripheral portion by continuously changing the focal length during exposure for imaging recording. The between-exposure magnification mode is an imaging mode that is executed when the photographer operates the operation unit 116 and selects the between-exposure magnification mode. FIG. 3 is a flowchart for explaining the basic form of the inter-exposure scaling mode according to the present invention. When the imaging apparatus is in the between-exposure magnification mode, the magnification lens 101 is moved to a predetermined magnification start position stored in the magnification start position storage unit 212 (S100). Next, when SW2 is turned on and a photographing instruction is given (S101), driving of the variable power lens 101 is started (S102). When the exposure start time for imaging recording stored in the exposure start time storage unit 213 has elapsed since the start of zooming driving (Yes in S103), exposure is started (S104).

  Although not shown, the exposure time for imaging and recording is determined by the photometric result before the start of imaging, and the shutter / aperture 102 is driven to shield the image sensor 105 so that the desired exposure time is reached (S105). When the image sensor 105 is shielded from light in S105, the charge accumulation is completed and the exposure is terminated (S106). When the exposure is completed, the zoom lens 101 is stopped (S107), and the inter-exposure variable magnification shooting is ended (Yes in S108). Here, when continuously performing variable magnification shooting between exposures (No in S108), the process returns to S100, moves the variable magnification lens 101 to a predetermined variable magnification start position, and waits for the next imaging instruction. A specific description of the predetermined scaling start position will be described later.

  FIG. 4 is a diagram illustrating an example of a control method related to the backlash of the variable magnification lens 101 in a lens barrel in which the amount of extension of the variable magnification lens 101 is temporarily shortened at a position during the magnification change. First, in the curve shown in the upper part of FIG. 4, the vertical axis indicates the amount of extension of the variable magnification lens 101, the horizontal axis indicates P1 as the wide-angle end position, P2 to P3 to P4, and so on up to the telephoto end position of P11. The position of the variable magnification lens 101 is shown so that the focal length continuously increases. The zooming position of P4 is the position where the amount of lens extension is the smallest, and this position is hereinafter referred to as a zooming inflection point.

  Operation to remove the backlash in the direction in which the lens barrel extends (P4 → P1, P4 → P11) so that the lens barrel does not retract even if the front of the lens barrel is pushed by hand after zooming is stopped. I do. FIG. 4A shows an example of a zooming control method in the case of zooming from a wide-angle end position P1 to a position that does not reach the zooming inflection point P4. When driving starts from P1 and stops at P3, the variable power lens 101 is driven in the retracting direction, so after driving “distance of P1 to P3” + “distance of mechanical backlash”, the reverse direction (feeding direction) In addition, the backlash removal drive is performed for the distance of “mecha backlash”. When returning to the original position and taking a picture again, it is driven in the feeding direction by “distance of P1 to P3”.

  Similarly, B in FIG. 4 shows an example of a zooming control method when zooming from the wide-angle end position P1 to a position passing through the zooming inflection point P4. When driving is started from P1 and stopped at P6, the variable power lens 101 is driven to stop in the extending direction, and therefore, “distance of P1 to P6” + “distance of mechanical backlash” is driven. When shooting is performed again after returning to the original position, driving is performed in the reverse direction by “distance of P1 to P6” + “distance of mechanical backlash”.

  FIG. 4D shows an example of a zooming control method in the case where zooming is similarly performed from the position on the telephoto end side with respect to the zooming inflection point P4 in the telephoto end direction. When driving is started from P5 and stopped at P10, the variable power lens 101 is driven in the extending direction and stopped, so that “distance between P5 and P10” is driven. When returning to the original position and shooting again, after driving “distance of P5 to P10” + “distance of mechanical backlash” in the retraction direction, the “distance of mechanical backlash” is reversed in the reverse direction (feedback direction). Take drive.

  FIG. 4C shows an example of a scaling control method when scaling is performed from a position between the wide-angle end position P1 and the scaling inflection point P4 to a position passing through the scaling inflection point P4. is there. When driving is started from P3 and stopped at P10, the variable power lens 101 is driven in the extending direction and stopped, so that “distance of P3 to P10” + “distance of mechanical backlash” is driven. When shooting is performed again by returning to the original position, the driving is performed in the reverse direction by “distance of P3 to P10” + “distance of mechanical backlash”.

  In the case of A with variable magnification driving from the wide-angle end position P1 as shown in A and B of FIG. 4, the case of A in which rattling driving is performed depending on whether or not the variable magnification stop position operates across the variable magnification inflection point P4. In the case of B which does not occur, the operational feeling and the quality are deteriorated. In addition, when continuously shooting under the condition of D, since the rattling removal drive is performed every time, if the shooting response is reduced or the live view video is displayed on the display unit 108, the image by the rattling removal driving is displayed. Since the angle change is visible, the quality deteriorates.

  On the other hand, when continuous shooting is performed under the condition C, the shooting response does not deteriorate because there is no need to play back. Further, since the quality of the live view video displayed on the display unit 108 is not deteriorated, the driving range is suitable for performing variable magnification shooting between repeated exposures. However, in the vicinity of the zooming inflection point P4, there is an effect on the photographed image such that the lens barrel or the lens is easily decentered due to an increase in the mechanical load, and the change in the angle of view is locally reduced. Concerned. Therefore, there is a problem that zoom driving including the zoom inflection point P4 in the exposure section is not desirable. Further, in the variable magnification shooting between exposures, it is necessary to move the shutter / aperture 102 at the end of the exposure. Therefore, the lower limit necessary for the imaging apparatus due to the influence of the power supply voltage drop when the inrush current of the variable magnification lens 101 and the shutter drive overlap. There was also a problem that it fell below the voltage.

  Therefore, in the present embodiment, the following control method is used to solve these problems. FIG. 5 is a diagram showing a process flow and a magnification position timing in the inter-exposure magnification mode of the present embodiment. In the variable magnification shooting between exposures, as described above, since the variable magnification lens 101 and the shutter / stop 102 operate simultaneously, it is necessary to control so that the inrush current for variable power driving does not overlap the inrush current for shutter driving. When variable magnification shooting between exposures is started, variable magnification driving is started, and exposure for imaging recording is performed after waiting for an exposure start time (inrush current time t1 of the variable magnification lens 101) after starting variable magnification driving. Start. The shutter / aperture 102 is energized so that the exposure time t2 becomes a desired time (shutter energization time t4), and the exposure ends. After the exposure is completed, post-processing such as reading of charges from the image sensor 105 is performed (post-exposure processing time t3), and the driving of the variable power lens 101 is stopped. As a result, even when the exposure time is short, the inrush current for variable power driving and the inrush current for shutter driving do not overlap, and the influence of the voltage drop of the power supply can be minimized. In addition, since the zoom lens 101 can be driven during the entire exposure period, it is easy to obtain an inter-exposure zoom effect even when the exposure time is short.

  Further, when the above sequence is overlaid on the diagram showing the amount of extension of the variable magnification lens 101, the variable magnification start position is set as follows. That is, the zooming start position is away from the zooming inflection point in a direction opposite to the zooming driving direction by a distance shorter than the driving distance of the zooming lens 101 during the inrush current time of the zooming lens 101. Set in advance. At this time, if the exposure start time is made equal to the inrush current time of the zoom drive, the zoom position at which exposure for imaging recording starts passes through the zoom inflection point. The influence on the image quality due to mechanical factors can be avoided. In addition, when the amount of change in the angle of view is small in the vicinity of the variable power inflection point, it is not necessary to be aware of the influence of the focus movement during the variable power inrush current time.

  As described above, according to the present embodiment, when performing inter-exposure variable shooting continuously, anybody can easily perform inter-exposure variable shooting without being affected by the backlash of the zoom mechanism. It can be carried out.

(Deformation)
The present invention is not limited to the embodiment described above, and various modifications and changes are possible, and these are also within the scope of the present invention.

(1) In this embodiment, the zoom lens 101 is driven during the inrush current time of the zoom lens 101 in a direction opposite to the zoom driving direction with respect to the zoom inflection point. An example is shown in which the positions are separated by a distance shorter than the distance. For example, when the change in the angle of view is large in the vicinity of the zooming inflection point, the zooming start position may be set in consideration of the focus correction as follows. That is, in the direction opposite to the magnification driving direction with respect to the magnification inflection point, the distance that the magnification lens 101 is driven by the time that the time required for the focus correction of the focus lens 104 is added to the magnification inrush current time. It may be a position separated by a short distance.

(2) In the present embodiment, the example in which the start position of the variable magnification lens 101 in the variable magnification mode between exposures is stored in the variable magnification start position storage unit 212 has been described. For example, when the driving speed of the zoom lens 101 is variable, the zooming start position may be calculated sequentially according to the driving speed.

(3) In the present embodiment, the exposure start time storage unit 213 has been described with an example of storing the time from the start of driving of the variable power lens 101 to the start of exposure. Not limited to this, it only needs to have a function as an exposure start condition storage means for storing an exposure start condition. For example, a movement in which the variable magnification lens moves from the drive start position of the variable magnification lens to the start of exposure. The amount may be stored.

(4) In each embodiment, although the example which applies this invention to an imaging device was shown, it is not restricted to this, For example, the control program of the imaging device which can make a computer perform the control method of the imaging device of this invention It is good also as a form.

  In addition, although this embodiment and modification can also be used in combination as appropriate, detailed description is abbreviate | omitted. Further, the present invention is not limited by the embodiments described above.

It is a figure which shows the system configuration | structure of embodiment of the imaging device by this invention. 3 is a detailed block diagram of a variable power drive control unit 109 and a focus drive control unit 112. FIG. It is a flowchart explaining the basic form of the variable magnification mode between exposure by this invention. FIG. 6 is a diagram for explaining an example of a control method related to the backlash removal of the variable magnification lens 101 in a lens barrel in which the amount of extension of the variable magnification lens 101 is temporarily shortened at a position during magnification change. It is a figure which shows the flow of the process of the magnification change mode between exposure of this embodiment, and the timing of a magnification position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Magnification lens 201 Magnification motor 202 Magnification motor drive circuit 203 Magnification reset position detection part 204 Magnification position detection part 205 Magnification control part 206 Intra-exposure variability control part 212 Magnification start position memory | storage part 213 Exposure start time Storage unit 109 Variable magnification drive control unit 102 Shutter / aperture 110 Shutter / aperture drive control unit 103 Shift lens 111 Shift lens drive control unit 104 Focus lens 112 Focus drive control unit 118 Control unit

Claims (6)

Photographing start instruction means;
A zoom lens control means for controlling driving of a variable focal length variable lens;
Shutter control means for controlling a shutter capable of blocking a light beam;
A zoom start position storage means for storing a drive start position of the zoom lens;
The time from the start of driving of the zoom lens to the time when the zoom lens moves and the exposure for imaging recording starts at a position beyond the inflection point of the feed amount , or the zoom lens An exposure start condition storage means for storing a movement amount from the drive start position to a position where the zoom lens moves and exceeds the inflection point of the feed amount to start exposure for imaging recording ;
Exposure control means for controlling the exposure time to the image sensor determined by the photometric result before the operation of the photographing start instruction means by controlling the timing at which the shutter blocks the light flux by the shutter control means,
The zoom lens control means starts zoom driving from the drive start position of the zoom lens stored in the zoom start position storage means,
Said exposure control means, after the operation of the shooting start instructing means, after the zoom drive the exposure starting condition storage unit from the start of the lapse of the time stored, or the exposure start from the zoom start position the moving amount of condition storage means for storing after said variable power lens is moved, together with the exposure is started for the imaging and recording, during which the zoom lens even after the exposure start is moving, With the passage of the exposure time determined by the photometric result before the operation of the photographing start instruction means, the shutter controls the shutter to block the light flux ,
The zoom lens control means stops driving the zoom lens after the exposure ends,
An imaging apparatus characterized by the above. The zoom start position storage means is a distance shorter than the distance the zoom lens moves during the inrush current time of the zoom lens in a direction opposite to the zoom driving direction with respect to a predetermined zoom position. Storing the distant position as the driving start position of the zoom lens;
The imaging apparatus according to claim 1. The zooming start position storage means passes an inrush current time of the zoom lens and a time necessary for focus correction of the focus lens in a direction opposite to the zoom driving direction with respect to a predetermined zoom position. In the meantime, storing a position separated by a distance shorter than the distance that the zoom lens moves as the drive start position of the zoom lens,
The imaging apparatus according to claim 1 or 2, characterized in. The predetermined zoom position is a position where the amount of extension of the zoom lens is minimized,
The imaging apparatus according to claim 2 or 3, wherein Photographing start instruction means;
A zoom lens control means for controlling driving of a variable focal length variable lens;
Shutter control means for controlling a shutter capable of blocking a light beam;
A zoom start position storage means for storing a drive start position of the zoom lens;
The time from the start of driving of the zoom lens to the time when the zoom lens moves and the exposure for imaging recording starts at a position beyond the inflection point of the feed amount , or the zoom lens An exposure start condition storage means for storing a movement amount from the drive start position to a position where the zoom lens moves and exceeds the inflection point of the feed amount to start exposure for imaging recording ;
Exposure control means for controlling the exposure time to the image sensor determined by the photometric result before the operation of the photographing start instruction means by controlling the timing at which the shutter blocks the light flux by the shutter control means;
An imaging apparatus control method comprising:
Start zooming from the driving start position of the zooming lens stored in the zooming start position storage means,
After the operation of the shooting start instructing means, said after the exposure start condition storage unit from the start of the zoom drive has passed the time of storing or the exposure start condition storage unit from the zoom start position is stored the amount of movement after moving said zoom lens, starts the exposure for image-recording by the exposure control means, in the middle of the variable power lens even after the exposure start is moving, the With the passage of the exposure time determined by the photometric result before the operation of the photographing start instruction means, the shutter controls the shutter to block the light flux ,
Stopping the driving of the zoom lens after the end of exposure by the zoom lens control means;
A method for controlling an image pickup apparatus. Computer
Photographing start instruction means;
A zoom lens control means for controlling driving of a variable focal length variable lens;
Shutter control means for controlling a shutter capable of blocking a light beam;
A zoom start position storage means for storing a drive start position of the zoom lens;
The time from the start of driving of the zoom lens to the time when the zoom lens moves and the exposure for imaging recording starts at a position beyond the inflection point of the feed amount , or the zoom lens An exposure start condition storage means for storing a movement amount from the drive start position to a position where the zoom lens moves and exceeds the inflection point of the feed amount to start exposure for imaging recording ;
An image pickup apparatus that functions as an exposure control means for controlling the exposure time to the image pickup element determined by the photometric result before the operation of the photographing start instruction means by controlling the timing at which the shutter blocks the light beam by the shutter control means. Control program
The zoom lens control means starts zoom driving from the drive start position of the zoom lens stored in the zoom start position storage means,
After the operation before Symbol shooting start instructing means, after the zoom drive the exposure starting condition storage unit from the start of the lapse of the time stored, or the exposure start condition storage unit from the zoom start position is stored wherein a movement amount after the variable power lens is moved, it starts the exposure for image-recording by the exposure control means, in the middle of the variable power lens even after the exposure start is moving to, With the passage of the exposure time determined by the photometric result before the operation of the photographing start instruction means, the shutter controls the shutter to block the light flux ,
Stopping the driving of the zoom lens after the end of exposure by the zoom lens control means ;
A control program for an imaging apparatus.

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