JPH03233526A - Camera capable of obtaining fantasy effect - Google Patents

Abstract

PURPOSE:To obtain a fantasy effect without depending on a shutter speed by performing exposure for a focused image and a defocused image plural times and moving a lens while performing the exposure for them. CONSTITUTION:The exposure is performed for the focused image and the defocused image plural times and the lens 5 is moved while performing the exposure for them. Namely, a photograper executes multiple exposure at a focused position and a position where a focusing position is automatically diverged by a fixed quantity from the focused position, and the focusing position is diverged while performing the multiple exposure. Therefore, the shutter speed 10 is set regardless of the divergence quantity of the focusing position. Thus, the restriction of the fantasy effect by a photographing condition is eliminated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention superimposes an out-of-focus image around an in-focus image to produce a 7T camera such as a 7-year-old child or a 7T camera with an inter-exposure zoom. This invention relates to a camera that performs phantom photography to obtain a unique effect.

[Conventional technology]

Conventionally, cameras have been known in which a lens is continuously moved during exposure so that an in-focus image and an out-of-focus image are superimposed.

[Problem to be solved by the invention]

It is clear that when the amount of movement of the lens is small, the amount of out-of-focus 1 becomes small, and the obtained Fantano effect becomes small.

Therefore, in conventional cameras, the shutter speed was slowed to ensure enough lens movement to achieve the desired effect.

When the shutter speed is slowed down in this way, there are problems such as camera shake being more likely to occur and the aperture value during shooting being restricted.

The present invention aims to eliminate this restriction on shutter speed.

[Means to solve the problem]

Therefore, in the present invention, instead of moving the lens during exposure as in the past, multiple exposures are performed for in-focus images and out-of-focus images (multiple exposure), and the lens is moved between each exposure. That's what I do.

[Effect]

Therefore, the shutter speed can simply be determined according to the brightness of the subject, and the degree of the 77 effect can be determined by
There is no need to depend on tar speed.

〔Example〕

FIG. 1 is a block diagram showing the circuit configuration of the camera of the present invention.

The control circuit 1 is a microcomputer that performs calculations, storage, and control of external circuits.

The film data reading circuit 2 reads the ISO code on the film bat A-table and sends it to the 1lil control circuit 1 as the sensitivity Sv. The display circuit 3 is connected to the control circuit 1 as described later.
Various displays are performed according to the instructions of the controller. The AE circuit 4 receives data sent from the control circuit 1, shutter speed Tv.
Exposure is controlled based on c and aperture value Avc. The photographic lens 5 has the maximum aperture value Avo and the minimum aperture value A vs+ax
This data K
can be read by the control circuit 1. Further, the lens drive circuit 8 controls the shooting lens according to data from the control circuit 1.
Drive X:5. The photometry circuit 6 measures the subject brightness By and sends it to the control circuit 1. The film drive circuit 9 winds up one frame of the film or rewinds the entire film according to commands from the control circuit 1.

The switch S1 is turned ON when the release button is pressed to the first step, and the switch S2 is turned ON when the release button is pressed to the 2151st step. Switch Su
p and S down are switches that are turned on when changing the combination of aperture value and shutter speed for exposure (hereinafter referred to as P shift). The switch Sd is a switch that is turned on to decide whether or not to take a picture to obtain the 77-unit effect, and once this switch is turned on, the control circuit 1 remembers that it has been turned on. ing. The switch Se is a switch that is turned on to set the degree of the effect.

The switch Sae is turned on to select the AE mode during normal shooting. When the switch Sp is turned on, the camera is forcibly placed in the initial layer state even if it is in the 7-antano shooting mode. Switch 7Sr is a switch that is turned on to rewind the film.

The operation 70- of this camera will be explained below based on FIGS. 2 to 6.

When the camera is powered on, 70- shown in FIG. 2 is activated. At 70-, it is cyclically detected whether any of the switches S, Se, or Sae is pressed, and if the switch is pressed, a subroutine corresponding to each switch is executed. These three subroutines are explained in Section 5.3.
Shown in Figure 4.

FIG. 3 shows a subroutine that is executed by turning on the switch Se, and is used to determine which one of the seven antanor effects prepared in three stages is to be selected. In step 1, the degree of effect is selected from 1 to 3 and assigned as strength A, depending on the number of times the switch Sup*Sdown is turned on. Furthermore, since this selection is made prior to actual photographing, initial values for photographing are also set at this time.

In other words, in step 2, the shift for P shift)
fisH is reset, and in step 5, the number of exposures N during multiple exposure is reset, and the process returns.

In intermediate steps 3 and 4, if the number of exposure executions is not NIJfO, it is determined that the multiple exposure was completed during the previous shooting, and the film is wound by one frame.

FIG. 4 shows a subroutine that is executed in response to turning on the switch 70-middle switch Sae in FIG.
This is for selecting one from four AE modes: S and M. In this routine, first in step 1 it is determined whether the switch Smr is turned on, and if it is turned on, in step 2 the routine sets the P mode exclusively for fantasy photography and returns. If it is not turned on, normal shooting will be performed, so in step 3 switch S u9.
+ Select one of P, A, S, and M modes according to the number of ON times of S down and return.

FIG. 5 shows a subroutine that is executed in response to switch 70-middle switch S in FIG. 2 being turned on. switch S
Since the fact that 1 is turned on means that the photographer has the intention of releasing the camera, arithmetic control regarding actual exposure execution is performed in this routine.

First, in steps 1 to 3, subject brightness Bv, film sensitivity Sv, and data K are input from the photometry circuit 6, film data reading circuit 2, and photographing lens 5, respectively. next,
Exposure in step 4, tEv = B y + S
It is determined by the formula of v. Then, in step 5, it is determined whether the switch Sd is turned on, and if it is not turned on, the process proceeds to step 30 and subsequent steps 70- for normal photography, and if it is turned on, the process proceeds to step 6.

During normal shooting, in step 30, the aperture value Avc and shutter speed T are set based on a known general program diagram.
Decide on vc. Then, in step 31, it is determined whether the number of exposure lines N is O. If it is not 0, the process proceeds to step 25, and if it is 0, the aperture value and shutter speed are displayed on the display circuit 3 in step 32, and then in step 33. It is determined whether the switch S2 is turned on. If the switch S2 is not turned on, the process returns; if it is turned on, the exposure control is performed by the AE circuit 4 in step 35.

Then, in step 36, the film drive circuit 9 winds the film one frame and turns the film completely.

In step 6.7, it is detected whether the switch Sr is turned on or not. If it is turned on, step 28
．． Proceed to step 27. In step 28, the shift 18H is reset for initialization, and the memory as to whether the switch Smf has been turned on is also reset. In step 2, the number of exposures N is determined, and if it is 0, the process returns, and if not, the process proceeds to step 25 for winding. At step 27, the film drive circuit 9 causes the film to be rewound simultaneously SH,! :Reset and return.

When ON of the switch is not detected in step 6.7,
In step 8, the aperture value Av and shutter speed Tv are determined based on the exposure IEv and the program diagram shown in FIG. And in steps 9 to 12, switch Sup+? for P shift? Sd.

Detects if wn is not Orl and switches Sup
When is ON, add 1 to jlsH and S
When down is ON, subtract 1 from the shift amount SH and proceed to step 13, where the aperture value Av and shutter speed Tv that have already been obtained are set as Avc=Avc.
J Avc-8H Tvc=Tvc-ΔTVC-8H It is changed by the following two formulas. Here, ΔAvc and ΔTvc are unit change amounts, for example, 0.5.

Since the aperture value Ave and shutter speed Tve have been determined in step 70- up to this point, they are displayed on the display circuit 3 in step 14.

Next, in steps 15 to 17, the current Ren r u
Calculate the amount of lens movement from i. For this purpose, first in step 15, the aperture value Avc expressed as an apex value is converted into an F value using the formula F''(r2)-Avc.The photographic lens 5 is driven by a motor in the lens drive circuit 8, The motor is connected to an encoder that generates pulses every certain amount of rotation.The control circuit 1 receives data from the lens as the number of pulses required to move the lens by 1 μm, and the number of pulses required to move the lens by 1 μm is input from the lens. If the amount of rotation is Y, then the amount of rotation of the motor required for that, L', is expressed as L' = Y-K.On the other hand, if we consider that the degree of effect of 7-antano photography, X, is proportional to Y/F, then the effect of X is It can be said that the amount of rotation L' to obtain is proportional to F-K-X.If the effect
' is expressed as L'=F-K-X, which is calculated in step 16.

In step 17, the actual amount of lens drive during photographing is determined by multiplying L' by the strength of the effect A determined by the routine shown in FIG.

Next, in step 18, it is determined whether the switch S2 is turned on, and if it is not turned on, the process returns and the switch S2 is turned on.
If so, proceed to step 19. In step 1, the number N of exposed images is counted up, and in step 20, it is determined whether the value has reached 2 or not. During the first shooting, N=1, so step 21 is not executed (that is, the lens is not moved) and exposure is performed at step 23, but during the second shooting, N=2, so the exposure is near the focal position. (Step 2)
After 1), exposure is performed in step 23. and,
It is determined whether the re-VN has reached 2, and if it has reached 2, the film is wound one frame in steps 25 and 26 and the exposure execution number N is reset, and then the process returns, but if it has not reached it, the process returns without winding.

In this example, multiple exposure is performed for only two frames: the position where the photographer has set the focus and the position where the focus and α position are automatically shifted by a certain amount from there. It may be possible to make them match, or it may be possible to make multiple exposures for a larger number of frames.

〔Effect of the invention〕

In this way, in the present invention, since the M4 is configured to shift the focal position during multiple exposures, the shutter speed can be set regardless of the amount by which the focal position is shifted. Therefore, the 77 effect is not limited by photographing conditions.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the circuit configuration of the camera of the present invention, Fig. 2 is a flowchart showing the main routine of camera operation, and Figs. 3 to 5 correspond to a part of Fig. 2. This is a subroutine, and FIG. 6 is a subroutine at 70- in FIG.
FIG. 1 is a diagram of program #1 for use in the calculations in FIG. WJ1 Figure 4

Claims (1)

[Scope of Claims] Setting means for setting the amount of movement of the lens; initiation means for starting release; multiple exposure means for exposing the same frame multiple times in response to a command from the initiation means; A camera capable of producing a fantasy effect, comprising a lens moving means for moving the lens by an amount set by the setting means during exposure.