JPH0718967B2 - Zoom lens macro photography mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a zoom lens including a region closer to the closest end of a normal shooting distance range including infinity, that is, a so-called macro shooting distance range. The present invention relates to a macro photography mechanism of a zoom lens that enables adjustment.

(Prior Art) As a macro mechanism in a zoom lens, there are a so-called focus extension macro system in which a normal shortest shooting distance is shortened and called a macro region, and a macro mechanism system in which a plurality of lens groups are moved to obtain a high magnification. is there. However, the former has a drawback that a sufficient high magnification cannot be obtained because it is usually an extension of focusing, and the latter having a special macro mechanism is often adopted as a macro system of a zoom lens.

(Problems to be Solved by the Invention) Ideally, macro photography is ideally possible in the entire range of the zooming area, but in reality, a part of the zooming area is affected by eclipse of a light beam and optical performance. Macro shooting is almost impossible in such a zooming area due to deterioration and collision of lenses. For example, the conventional zoom lens with macro has a structure in which macro photography can be performed only at the long focus side end point (tele macro) or the short focus side end point (wide macro) of the zooming area, and other focal length range, that is, near range. Although there is a limit to the amount, theoretically, most of the focal length range in which macro photography is possible does not allow macro photography at all.

An object of the present invention is to solve such a drawback and to obtain a macro function of a zoom lens that enables macro photography up to the maximum magnification allowed at each focal length in almost the entire zooming range.

(Means and Actions for Solving Problems) In order to achieve the above object, in the present invention, a first distance adjusting member (1) for moving a first lens group for performing focusing in a normal shooting distance range. A second distance adjusting member (2) for moving the second lens group for focusing in a macro shooting distance range including a closer range than the closest end of the normal shooting range, and a focal length for zooming. A zoom lens having the adjusting members (11, 5) is a prerequisite.

In such a zoom lens, the first feature is that the operation limit position of the second distance adjusting member (macro operation ring) changes in accordance with the position of the focal length adjusting member (the maximum macro photographing position changes in accordance with the focal length. To do).

The second feature is that when the second distance adjusting member is further operated beyond the operation limit position, the position of the focal length adjusting member changes in conjunction with this, and the operation amount of the focal length adjusting member becomes maximum. It is to be moved to the position automatically.

Therefore, in the present invention, the second distance adjusting member (2) is
The first contact portion (2f) whose position is restricted with respect to the fixed lens barrel (3) during normal shooting and the first contact portion with respect to the focal length adjusting member during macro shooting are It has a second contact portion (2c) whose movement in the closest direction is restricted. The focal length adjusting member (11, 5) is a third contact portion (14) that moves integrally with the focal length adjusting member in response to the focal length adjusting operation. It does not contact the second contact portion (2c) in the entire area, but contacts the second contact portion according to the setting position of the focal length adjustment member during macro photography, and the second distance adjustment member (2) is not contacted. A third contact portion (1 provided at a position that limits movement in the closest direction
Having 4). These constitute a macro photography area setting means.

Then, the second contact portion (2c), the third contact portion (14),
A second distance adjusting member (2) and a focal length adjusting member (11,
5) is the operation of the second distance adjusting member and the focal length adjusting member by operating the second distance adjusting member in the close-up direction in a state where the second contact portion and the third contact portion are in contact with each other. Move together.

(Example) Hereinafter, the Example of this invention is described based on drawing. 1 is a sectional view showing an embodiment of the present invention, and FIG.
FIG. 3 and FIG. 3 are developed views showing the main part of the above embodiment, in which the lateral direction in both figures is the lens optical axis direction.
The vertical direction corresponds to the circumferential direction.

In FIG. 1, 3 is a fixed lens barrel, 11 is a zoom operation ring, 2
Is a macro operation ring, and 1 is a distance ring as a first distance adjusting member. The fixed lens barrel 3 has a cylindrical portion extending leftward in FIG. 1 and a coupling portion 3a connected to a camera body main body (not shown) at the right end, and a known diaphragm for adjusting the aperture diameter of the diaphragm blade 24 on the outer circumference. The preset ring 4 is fitted and supported.
(Mechanisms related to the diaphragm are omitted here). The macro focusing operation ring 2 (hereinafter referred to as “macro operation ring”) as the second distance adjusting member includes a helicoid screw 2b provided on the inner diameter side and a helicoid screw 3f provided on the outer periphery of the fixed lens barrel 3. It is supported by the fixed lens barrel 3 by being screwed with and is rotated by the rotation of the helicoid screws 2b and 3f to move in the optical axis direction.

A cam barrel 5 is rotatably fitted and supported on the outer periphery of the fixed lens barrel 3, and a macro limiting pin 14 is erected on the outer periphery of the right end portion (in FIG. 1) of the cam barrel 5 and a macro sliding frame is mounted. 12
Are fixed by machine screws 13. Macro sliding piece 12
Is engaged with a circumferential groove 2a provided in the macro operation ring 2, and the macro limiting pin 14 is configured to move together with the macro sliding piece 12 in the circumferential groove 2a (see FIG. 3). . Further, a zoom operation ring 11 is fixedly provided on the outer periphery of the cam barrel 5,
And the zoom operation ring 11 constitute a focal length adjusting member.
The cam barrel 5 is formed with a through hole 5d opening to the outer peripheral portion of the fixed lens barrel 3, and a steel ball 21 is arranged in the through hole 5d. On the outer periphery of the cam barrel 5, a leaf spring 23 is fixed by a small screw 22 so as to urge the steel ball 21 toward the center of the cam barrel 5. Then, the wide end state of zooming (see FIGS. 1 to 3).
In the state shown in the figure), a straight groove 3e that is long in the optical axis direction is provided on the outer peripheral portion of the cylindrical portion of the fixed lens barrel 3 that is immediately below the position where the through hole 5d exists, and the plate is wide end state. The steel ball 21 pressed by the urging force of the spring 23 engages with the linear groove 3e. The leaf spring 23, the steel ball 21, and the straight groove 3e constitute a click stop mechanism.

As shown in FIG. 2, the cam barrel 5 is provided with an arcuate cam groove 5b and an arcuate cam groove 5c, and one arcuate cam groove 5b is provided with a first sliding member implanted in the first moving barrel 8. The pin 16 slidably engages with the cylindrical portion of the fixed lens barrel 3 through the first linear guide groove 3c formed long in the optical axis direction. Other circular arc cam groove 5c
Is the second straight guide groove 3d provided in the cylindrical portion of the fixed barrel 3.
The second sliding pin 20 that is planted in the second moving cylinder 9 through the
Are slidably engaged. A notch portion 5a is formed at the right end of the cam barrel 5, and the upper end 5e or the lower end 5f thereof is fixed to the fixed lens barrel 3.
By making contact with the limiting pin 15 that is planted in, the amount of rotation of the cam barrel 5, that is, the amount of zooming is limited.

As shown in FIG. 3, the switching button 19 is provided on the macro operation ring 2.
A stopper 18 is provided so as to be actuated in the radial direction by the notch 3g formed in the fixed lens barrel 3
It is possible to engage and disengage. The macro operation ring 2 has a notch in the macro stopper 18 in normal shooting conditions other than macro shooting.
Since it is engaged with 3g, it does not rotate and is therefore completely fixed. On the other hand, at the time of macro photography, by pressing down the macro switching button 19 and moving the stopper 18 in the depth direction of the paper surface in FIG. 3 to disengage from the notch 3g, the macro operation ring 2 can be rotated. .

On the other hand, on the inner circumference of the fixed lens barrel 3, a first moving barrel 8 that supports a first lens holding frame 7 that holds the first lens unit L ₁ via helicoid screws 7a and 8a, and a second lens unit L. The second movable barrel 9 holding the _second and fourth lens units L ₄ is slidably supported, and the fixed lens barrel 10 holding the third lens unit L ₃ is a small screw.
It is fixed by 17. On the outer periphery of the first lens holding frame 7, there is provided a normal photographing area distance adjusting operation ring 1 (hereinafter, referred to as "distance" as a first distance adjusting member having a distance scale for adjusting a distance of the normal photographing area from infinity to a close range). is referred to as the ring ") is fixed, by rotating this, the first lens group L ₁ is as configured displaced in the optical axis direction while rotating according helicoid screw 7a, 8a lead.

An index cylinder 6 is fixedly provided on the outer periphery of the left end portion of the fixed lens barrel 3. As shown in FIGS. 4 to 7, the distance ring 1 has a distance scale 1a and a triangular index 1b indicating a magnification position scale. Is engraved on the index cylinder 6, and a base line that serves as an index for the magnification scale 1c and the distance scale 1a.
6a and scale line indicating the amount of infrared correction at a specific focal length
6c and a focal length scale 6b indicating the focal length corresponding to the scale line are engraved.

Next, the operation of this embodiment will be described.

Since this embodiment is configured as described above, the zoom operation ring 11 is moved from the wide end fw state of zooming shown in FIGS. 1 and 2 toward the tele end ft for zooming as shown in FIG. When rotated in the clockwise direction when viewed from the right side, the cam barrel 5 integral with this rotates clockwise around the fixed lens barrel 3 (displaced upward in FIGS. 2 and 3). In this case, since the macro sliding piece 12 is engaged with the circumferential groove 2a and the black operation ring 2 is screwed to the fixed lens barrel 3 by the helicoids 2b and 3f, unless the macro operation ring 2 is rotated, The cam barrel 5 does not move in the optical axis direction. That is, in the state of the normal photographing area in which the macro stopper 18 and the notch 3g of the fixed lens barrel 3 are engaged, the cam barrel 5 only rotates about the optical axis and does not move in the optical axis direction. .

Therefore, when the cam barrel 5 rotates clockwise when viewed from the right side in FIG. 1, the lower end 5f of the cutout portion 5a of the cam barrel 5 contacts the limiting pin 15 planted in the fixed lens barrel 3, The cam barrel 5 stops its rotation at the tele end position for zooming. This cam cylinder 5
The first sliding pin 16 slides in the first linear guide groove 3c according to the cam shape of the arcuate cam groove 5b with the rotation of the first lens group L ₁
Move from the wide end position to the tele end position. Also, the second sliding pin 20 is pushed by the arcuate cam groove 5c, and the second straight guide groove
It moves to the left in FIG. 2 along 3d to move the second lens unit L ₂ and the fourth lens unit L ₄ to the left to change the wide end fw state to the tele end ft state. Since the fixed lens barrel 10 does not move, the third lens unit L ₃ held by it remains stationary.

Next, distance adjustment (focusing) will be described. In the case of adjusting the distance from infinity to the shortest distance of the normal shooting area, the first lens holding frame 7 is rotated by rotating the distance ring 1.
While rotating, the helicoid screws 7a and 8a are extended to the left in FIG. 1 according to the leads. Therefore, the first lens unit L ₁
While rotating, moves to the left on the optical axis, enabling focusing within the normal shooting area. Since the operation of each member is performed completely separately from the operation of zooming, focusing in the normal photographing area is possible in the entire range of zooming.

Distance adjustment (focusing) for subjects in macro shooting areas that are closer than the normal shooting area
When the zoom operation ring 11 is rotated for zooming, the macro switching button 19 is pressed to disengage the macro stopper 18 from the notch 3g, and then the macro operation ring 2 is rotated. The position of the macro operation ring 2 with respect to the fixed lens barrel 3 is restricted by the contact between the end surface 2f of the cutout 2d and the protrusion 3b. That is, the end surface 2f serves as the first contact portion. The rotation amount of the macro operation ring 2 is limited to the distance l ₂ in FIG. 3 due to the interaction between the cutout 2d at the right end of the macro operation ring 2 and the protrusion 3b at the left end of the fixed barrel 3. When the macro operation ring 2 is rotated clockwise (displaced downward in FIG. 3) when viewed from the right in FIG. 1 from the wide end state shown by solid lines in FIGS. 1 to 3,
The macro operation ring 2 moves in the optical axis direction while rotating according to the leads of the helicoid screws 2b and 3f. At this time, the cam cylinder 5
Cannot rotate because the rotation is blocked by the limiting pin 15 in the rotation direction of the macro operation ring 2, and due to the engaging action of the macro slide piece 12 and the circumferential groove 2a of the macro operation ring 2, It moves in the direction of the optical axis (leftward in FIG. 1) integrally with 2. As the cam barrel 5 moves leftward, the first sliding pin 16 and the second sliding pin 20 move leftward together with the cam barrel 5 in the optical axis direction rectilinear grooves 3c and 3d. , The first movable barrel 8 and the second movable barrel 9 move leftward along the optical axis. Therefore, the first lens unit L ₁ , the second lens unit L ₂ , and the fourth lens unit L ₄ integrally move straight to the left along the optical axis, and macro focusing in the macro photographing area becomes possible.

The operation amount of this macro focusing, that is, the macro operation ring 2
The maximum rotation amount of changes according to the focal length set by zooming. For example, in the wide end state shown in FIGS. 1 to 3, since the macro limiting pin 14 is at the position shown by the solid line as shown in FIG. 3, the macro operation ring 2 has the end surface 2c of the circumferential groove 2a which is the macro. Distance to contact the limiting pin 14 (l ₁ +
It is possible to rotate by l ₂ ) = l ₂ . The end surface 2c of the circumferential groove 2a constitutes a second contact portion, and the macro limiting pin 14 constitutes a third contact portion. On the other hand, in the tele end state, the macro limit pin
14 is at the position 14 'shown by the broken line in FIG. 3, and the maximum rotation amount of the macro operation ring 2 is only the distance l ₃ . Also, at any position in the middle from the wide end to the tele end, the macro limiting pin is at a position of, for example, 14 ″, and the maximum rotation amount of the macro operation ring 2 is the distance l _4. That is, the macro focusing amount is the wide end. Is the largest, and becomes smaller as it goes to the tele side.

In addition, in the present embodiment, from the state where the end surface 2c of the circumferential groove 2a is in contact with the limiting pin 14 except at the focal length where the macro limiting pin 14 is at the position 14 'or 14'', that is, at the wide end. When the macro operation ring 2 is further rotated toward the macro close-up side (displaced downward in FIG. 3), the end face 2c pushes the limiting pin 14, so that the cam barrel 5 and the macro operation ring 2 are united, and the cam. The end face 5e of the limiting cutout of the barrel 5 rotates until it comes into contact with the limiting pin 15. Therefore, no matter which focal length the zoom operating ring 11 is set to, the macro operating ring 2 is forced to rotate, Macro focusing is possible up to the macro closest to the wide end.In addition, once the zooming operation ring 11 is set to the wide end, the cam cylinder 5 is also fixed at the wide end position by the click stop mechanism (click). The click stop mechanism contributes to improving the feeling of zooming operation by setting the rotation torque of the cam barrel 5 to an appropriate value except for the wide end. If the zoom operation ring 11 is fixed in this state, it is convenient to operate only the macro operation ring 2 so that macro focusing can be performed as if operating the distance ring 1. If there is no click stop. When the frictional force generated between the macro slide piece 12 and the circumferential groove 2a of the macro operation ring 2 becomes large under some condition, the zooming operation ring 11 is not prepared due to the rotation of the macro operation ring 2. However, since the focal length changes from the wide end, the operability deteriorates.However, if this point is not a problem, the click stop mechanism is not necessarily an essential mechanism.

FIG. 8 shows a graph in which the horizontal axis represents the shooting distance and the vertical axis represents the set focal length of the zoom operation ring 11 in order to clearly show the image-capable area in this embodiment. The inside of the quadrangle formed by the four points a, b, c, and d indicates the normal photographing area, that is, the combined range of the focal length and the photographing distance that can be set by the operation of the zoom operation ring 11 and the distance ring 1, The inside of the quadrangle formed by the four points c, d, e, and g shows a macro photographing area, that is, a combined range of the focal length and the photographing distance which can be set by the operation of the zoom operation ring 11 and the macro operation ring 2. For example, when the zoom ring 11 is set to the focal length fi, when the range ring 1 is rotated from ∞ to the closest position, only the shooting distance changes from the point h to the point i as indicated by the arrow A. Next, when the macro operation ring 2 is rotated, macro focusing can be performed between the point i and the point j, and when the macro operation ring 2 is forcibly rotated, the focal length and the shooting distance are changed from the point j to the point e. Change towards. That is, by operating only the macro operation ring 2, macro focusing as shown by the arrow B becomes possible.

Here, when considering conventional wide macro zoom lenses for comparison, most of them are configured so that macro focusing can be performed only when the zoom operation ring is fixed to the wide end. In that case, the 8th
It means that only the area on the straight line d-e can be photographed in the macro area (quadrangle cd-e-g) shown in the figure. Therefore, it can be said that in the zoom lens of the present embodiment, the macro photography area is greatly expanded from the straight line d-e to the square cd-e-g.

Next, a description will be given of how to hide the display on the outside of the lens barrel during focusing and / or zooming. As described above, in the macro shooting area that is close to the normal shooting area, the cam barrel 5 is integrally moved in the optical axis direction by rotating the macro operation ring 2, and the arc cam groove 5b and the first sliding pin are moved. The distance ring 1 together with the first moving barrel 8 through the engagement of 16
Moves in the optical axis direction (to the left in FIG. 1). Then, within the range of the normal photographing distance, the magnification scale 1c hidden by the distance ring 1 as shown in FIG. 4 can be seen from the outside as shown in FIG. 5 by moving the distance ring 1 to the left. Like On the other hand, the focal length scale 6b and the infrared correction scale 6c
Appears in the normal shooting state as shown in FIG. 6, and when the zoom operation ring 11 moves to the left by the length x in the macro shooting area, it is hidden under the zoom operation ring 11 as shown in FIG. Become invisible.

That is, since the macro magnification scale 1c is not visible at all in the normal photographing state and is displayed only in the macro photographing state, it is possible to easily confirm that the macro photographing state is not caused by erroneous reading. In addition, the infrared correction display 6c, which cannot be used during macro photography due to aberrations or the like, can be prevented from being mistakenly used by hiding the scale only during macro photography.

FIG. 9 shows the movement locus of the four-group zoom lens corresponding to the above-mentioned embodiment, and the first lens group G1 having negative refractive power, the second lens group G2 having positive refractive power, and the third lens having negative refractive power. It consists of the group G3 and the fourth lens group G4 of positive refracting power, and the second lens group G2 and the fourth lens group G4 when zooming from the wide-angle end W to the telephoto end T.
G4 moves to the object side as a unit, the third lens group G3 is fixed to the image plane, and the first lens group G1 moves to the object side part way to keep the image forming position constant, and vice versa. Move to the object side. And in macro photography, the first lens group G
The first, second lens group G2 and fourth lens group G4 are integrally moved to the object side. The maximum shooting magnification of the macro is realized by moving from the wide angle side.

Fig. 10 shows the movement for macro photography in the entire zoom range. The dotted line in the figure shows the maximum movement position during macro photography at any focal length, and the shaded area in the figure shows the macro movement. The movable area | region in imaging | photography is shown.

FIG. 11 is a movement locus of a second group zoom lens as another embodiment in which the present invention can be used. The locus is composed of a first lens group G1 having negative refracting power and a second lens group G2 having positive refracting power, and has a wide angle. During zooming from the end W to the telephoto end T, the second lens group G2 moves to the object side, and the first lens group G1 moves to the image side halfway in order to keep the imaging position constant, and vice versa. Move to the side.
Then, in macro photography, the first lens group G1 and the second lens group G2 are integrally moved to the object side. Note that the maximum macro shooting magnification is realized by moving from the wide-angle side.

Figure 12 shows the movement for macro photography in the entire zoom range. The dotted line in the figure shows the maximum movement position during macro photography at any focal length, and the shaded area in the figure shows the macro. The movable area | region in imaging | photography is shown.

FIG. 13 is a movement locus of a four-group zoom lens as another embodiment in which the present invention can be used. The first lens group G1 has positive refracting power, the second lens group G2 has negative refracting power, and the positive refracting power is positive. Of the third lens group G3 and the fourth lens group G4, the first lens group G1 and the lens group G4 of FIG. 4 move together toward the object side during zooming from the wide-angle end W to the telephoto end T. The lens group G2 moves to the image side, and the third lens group G3 further moves to the object side to keep the image forming position constant. Then, in macro photography, the second lens group G2 is moved to the object side. The maximum shooting magnification of the macro is achieved at the telephoto end.

Fig. 14 shows the movement for macro photography in the entire zoom range. The dotted line in the figure represents the maximum movement position during macro photography at any focal length, and the shaded area in the figure indicates macro. The movable area | region in imaging | photography is shown.

The above description is merely an example of the present invention,
It goes without saying that the present invention should in no way be construed as limited to this. For example, in the above-described embodiment, the end surface of the circumferential groove of the macro operation ring 2 in the maximum macro state at the wide end.
At the same time that 2c abuts on the limiting pin 14, the end face 2e of the notch 2d abuts on the fixed lens barrel projection 3b, preventing the rotational force of the macro operation ring 2 from being concentrated on the limiting pins 15 and 14 (l ₃ + L ₂ = l ₂ is set). However, this is not necessarily an indispensable condition, and it is possible to set the relation of l ₃ + l ₁ <l ₂ and the macro operation amount l ₃ at the tele end is set to l depending on the convenience of the optical system. It is also possible to set ₃ = 0.

Further, in the optical system of the above-described embodiment, the first lens unit L ₁ and the second and fourth lens units L ₂ and L ₄ move at different speeds during zooming, and the _first and second lens units L ₂ and L ₄ move at different speeds.
And the fourth lens unit L ₁ , L ₂ and L ₄ are integrally formed, but there are various macro zoom lens optical systems other than this, and the application of the present invention is not limited to the above embodiment. It goes without saying that the optical system is not limited to the one shown.

Further, in the above-described embodiment, since only one cam barrel 5 is provided, the movement of the optical system during macro focusing can be set to only one speed. However, if, for example, the cam barrel is divided into two or more parts and each of the cam barrels is moved during macro focusing by a separate macro feeding helicoid screw, each lens group can be moved at different speeds. It is possible to move it to perform Tsukuro Focusing.

(Effects of the Invention) As described above, according to the present invention, macro photography is possible not only at the tele end and the wide end, but also at the focal length at a position therebetween, that is, in almost the entire zooming range (however,
Macro shooting range depends on the focal length). As a result, the photographable area is greatly expanded.

Further, by continuing the distance adjusting operation of the macro photographing as it is even after the operation of the second distance adjusting member is restricted by the focal length adjusting member, the focal length adjusting member is automatically moved to the maximum macro photographing position. Therefore, macro photography is possible with a simple operation.

[Brief description of drawings]

1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a development view of a lens barrel portion having a cam groove for moving the lens group of FIG. 1, a sliding pin and a click stop mechanism, and FIG. The figure is a development view of the macro operation ring mechanism showing the macro photography area mechanism and the macro photography area restriction, and FIGS. 4, 5, 6 and 7 show the scale display of the normal photography area and the macro photography area, respectively. FIG. 8 and FIG. 8 are graphs showing the relationship between the photographable area and the focal length. FIG. 9 is a view showing the movement locus of the four-group zoom lens corresponding to the above embodiment, and FIG.
FIG. 13 and FIG. 13 are views showing a modification of each FIG.
FIG. 14 is an explanatory diagram of its operation. [Explanation of reference numerals of main parts] 1 ... first distance adjusting member 2 ... second distance adjusting member 3 ... fixed lens barrel 5, 11 ... focal distance adjusting member 2f ... first contact portion 2c ... second contact part 14 ... third contact part

Claims (2)

[Claims] 1. A first distance adjusting member (1) for moving a first lens group for focusing in a normal photographing distance range.
And a second distance adjusting member (2) for moving the second lens group for focusing in a macro photographing distance range including a closer distance region than the closest end of the normal photographing distance range,
In a zoom lens having a focal length adjusting member (11, 5) for zooming, the second distance adjusting member (2) is regulated in position with respect to a fixed lens barrel (3) during the normal photographing. The first contact portion (2f) and the second contact portion (2f) whose movement in the close-up direction opposite to the first contact portion with respect to the focal length adjusting member during the macro photography is restricted ( 2c), wherein the focal length adjusting member (11, 5) is a third contact portion (14) that moves integrally with the focal length adjusting member in response to a focal length adjusting operation. During the normal photographing, the second contact portion (2c) does not come into contact with the entire focal length adjusting region, and during the macro photographing, the second contact portion is set according to the set position of the focal length adjusting member. To a position that restricts the movement of the second distance adjusting member (2) in the closest direction. The second distance adjusting member (2) in the state where the second contact portion (2c) and the third contact portion (14) are in contact with each other. ), The second distance adjusting member and the focal length adjusting member move integrally with each other. 2. The focal length adjusting member (11, 11) that maximizes the movable amount of the second distance adjusting member (2) in the closest direction.
The means for mooring the operation of the focal length adjusting member at the position 5) is provided.
A macro photography device for a zoom lens according to item.