TWM504973U - Filter frame with black card positioning function - Google Patents

Description

Filter holder with black card positioning function

This creation is about a filter frame with black card positioning function, which enables the photographer to stand at various positions such as the rear of the camera or the left and right sides, and control the black card or sewing card stably and accurately. The position of the filter holder with black card positioning function, which is advantageous for taking brighter and more uniform photos.

When photographers take pictures, they often encounter the situation of the scenes of the scenes they want to shoot. In view of the fact that the dynamic range of the camera's photosensitive elements is still too small, the bright part of the photographs is overexposed, or The dark part of the dark part can't see the details. To improve this dilemma, photographers need to use a grading mirror or a black card or a stitch card to improve the contrast between light and dark. However, each of the grading mirrors has its gradual dimming range, which sometimes does not meet various practical needs. Moreover, some scenes are not simply divided into two parts: the bright part and the dark part. For example, the middle is very bright, and the upper part and the lower part are darker. For example, the upper part is a very bright sky, the middle is a valley, and the mountain is very Dark, the bottom is a medium-bright foreground; like these scenes, simply using a gradient mirror can not achieve the purpose of shooting bright and even photos, then you need to use a black card at the same time.

When using a black card, the photographer will mount the camera on a tripod, first metering the bright and dark parts separately. For example, the bright part needs to be exposed for 2 seconds, while the dark part needs to be exposed for 20 seconds. theory The photographer can use the black card to take a brighter and more uniform picture. By using the black card in front of the lens, the bright part is first covered, and the shutter is pressed. At this time, the black and white are slightly shaken near the junction between the bright part and the dark part. Card, when the exposure time reaches 18 seconds, remove the black card from the outside of the lens until the exposure time reaches 20 seconds, then release the shutter. In this way, the area of the bright part is blocked for 18 seconds, and the last exposure is 2 seconds, and the dark part is directly exposed for 20 seconds, so that a brighter and more uniform picture can be taken.

However, in actual operation, the photographer needs to move the black card to the front of the lens and view it through the viewing window to cover the area of the bright part with the black card. The photographer needs to visually record the location of the black card at this time. Because when the shutter is pressed, the light that originally entered the camera through the lens and then passes through the viewing window will change into the camera and then directly into the photosensitive element of the camera, so the picture seen by the viewing window becomes dark. The photographer can only shake the black card by the impression, and can't effectively cover the area covered by the black card, so that the photos taken are often failed works. For the fleeting scenery, it is impossible to It is very regrettable to grasp the timing of the shooting.

Therefore, when a photographer uses a black card or a stitch card, the photographer has a situation like a scorpion, and the failure rate of the photograph taken is too high.

In view of this, the creator has developed a simple design, can avoid the above-mentioned shortcomings, is more convenient to use, and has the advantage of low cost, so as to take into account the considerations of flexibility and economy, and thus the creation of this creation.

The main purpose of this creation is to provide an auxiliary tool that allows photographers to stand at various positions, such as behind the camera or at various angles, left and right, and is stable and accurate. Control the position of the black card or the sewing card to assist in shooting brighter and more uniform photos.

For the above purposes, the present invention provides a filter holder having a black card positioning function for positioning a black card, wherein the filter frame includes a filter frame pivoting portion for one side of one of the connecting members The connecting member pivoting portion is pivotally connected; and a left scoring group and a right scoring group are respectively disposed on the left and right ends of one of the upper surfaces of the filter frame, wherein the other side of the connecting member is provided with a a pivoting ring for pivoting a lens pivot ring of one of the lenses of the camera, when the filter frame pivoting portion is pivotally connected to the connecting member pivoting portion, and the pivoting ring and the pivoting ring When the lens pivot ring is pivoted, the upper surface is oriented in the direction of the camera.

In implementation, the filter frame has a top left edge and a top right edge formed by the left and right sides of the filter frame and the upper surface of the filter frame, wherein at least the upper left edge and the upper right edge are at least One having a chamfer such that the left score group and/or the right score group extends from the left end and/or the right end of the upper surface of the filter holder to the upper left side and/or the upper right side The chamfer.

In implementation, the filter frame has a top left edge and a top right edge formed by the left and right sides of the filter frame and the upper surface of the filter frame, wherein at least the upper left edge and the upper right edge are at least One having a rounded corner such that the left score group and/or the right score group extend from the left end and/or the right end of the upper surface of the filter holder to the upper left side and/or the upper right side Rounded corners.

In implementation, the filter frame pivoting portion includes a groove, a fixing portion above the groove, and a fixing portion below the groove, the connecting member pivoting portion is formed by the groove The filter frame pivoting portion is pivotally connected, and the upper fixing portion and/or the lower fixing portion fix the pivotal connection between the connecting member pivoting portion and the filter frame pivoting portion.

In implementation, at least one of the upper fixing portion and the lower fixing portion is further provided with at least one screw, and at least one of the at least one screw is locked to fix the connecting member pivoting portion The pivotal connection with the filter frame pivoting portion.

In implementation, the upper fixing portion or the lower fixing portion is a card slot.

In the implementation, the filter frame further includes a left filter fixing portion and a right filter fixing portion, wherein the filter frame has a lower surface, and the left filter fixing portion and the right filter fixing portion are respectively disposed on the filter frame The left and right ends of the lower surface of the filter holder are used to fix at least one filter.

In practice, the left filter fixing portion and the right filter fixing portion respectively have at least one filter fixing groove, and each pair of left and right corresponding at least one filter fixing groove is used for fixing the at least one filter. One of the mirrors.

In implementation, the left filter fixing portion and the right filter fixing portion are respectively fixed to the left and right ends of the lower surface of the filter frame by at least one screw.

In addition, the present invention further provides a filter frame with a black card positioning function for positioning a black card, wherein the filter frame includes a pivot ring for pivoting a lens of one of the lenses of one camera. And a left score group and a right score group are respectively disposed on the left and right ends of one of the upper surfaces of the filter frame, wherein when the pivot ring is pivotally connected to the lens pivot ring, The upper surface faces the direction of the camera.

In implementation, the filter frame has a top left edge and a top right edge formed by the left and right sides of the filter frame and the upper surface of the filter frame, wherein at least the upper left edge and the upper right edge are at least One having a chamfer such that the left score group and/or the right score group extends from the left end and/or the right end of the upper surface of the filter holder to the upper left side and/or the upper right side The chamfer.

In implementation, the filter frame has a top left edge and a top right edge formed by the left and right sides of the filter frame and the upper surface of the filter frame, wherein at least the upper left edge and the upper right edge are at least One has a rounded corner such that the left score group and/or the right score group are separated by the filter frame The rounded corners of the upper surface and/or the right end of the upper surface extend to the upper left side and/or the upper right side.

In the implementation, the filter frame further includes a left filter fixing portion and a right filter fixing portion, wherein the filter frame has a lower surface, and the left filter fixing portion and the right filter fixing portion are respectively disposed on the filter frame The left and right ends of the lower surface of the filter holder are used to fix at least one filter.

In practice, the left filter fixing portion and the right filter fixing portion respectively have at least one filter fixing groove, and each pair of left and right corresponding at least one filter fixing groove is used for fixing the at least one filter. One of the mirrors.

In implementation, the left filter fixing portion and the right filter fixing portion are respectively fixed to the left and right ends of the lower surface of the filter frame by at least one screw.

In implementation, the pivot ring and the lens pivot ring are coupled to each other in a screwed manner.

In order to further understand the present invention, the preferred embodiments of the present invention, together with the drawings and figure numbers, detail the specific components of the present creation and the effects achieved thereby.

1‧‧‧Filter frame with black card positioning function

2‧‧‧ upper surface

3‧‧‧ lower surface

311‧‧‧Left filter fixing

312‧‧‧Right filter fixing

32‧‧‧ screws

331, 332‧‧‧ filter fixing slot

4‧‧‧Filter frame pivoting

41‧‧‧ Groove

42‧‧‧Under the fixed department

43‧‧‧Upper Department

5‧‧‧ Left Scoring Group

6‧‧‧Right score group

7‧‧‧ left side

8‧‧‧Top left

10‧‧‧Connecting parts

11‧‧‧ pivot ring

12‧‧‧Connector pivoting

100‧‧‧Black card or sewing card

101‧‧‧ camera

102‧‧‧ lens

103‧‧‧ Tripod

104‧‧‧Filter

a‧‧‧Part 3A partially enlarged area

L1, L2‧‧‧ dotted line

The first figure is a specific embodiment of a filter holder with a black card positioning function.

Fig. 2 is another embodiment of a filter holder with a black card positioning function.

Figure 3 is a combination of the specific embodiments of Figure 2.

Fig. 3A is a partially enlarged view of a portion of the specific embodiment of Fig. 3;

The fourth figure is a concrete combination implementation diagram of a filter frame with a black card positioning function.

The 5A and 5B drawings are based on the use of the black filter positioning function of the filter frame with two black cards. An illustration of the assisted shooting.

Figures 6 and 7 show another embodiment of a filter holder with a black card positioning function.

Please refer to FIG. 1 , which is a specific embodiment of a filter frame 1 with a black card positioning function. The filter frame 1 includes a left score group 5, a right score group 6, and a pivot ring 11. The filter frame 1 has an upper surface 2 and a lower surface 3. The left score group 5 and the right score group 6 are respectively disposed on the left and right ends of the upper surface 2 of the filter frame 1. Please also refer to FIG. 4, which is a specific combination implementation diagram of a filter frame 1 with a black card positioning function. Generally, a camera 101, whether it is a monocular camera or a monocular-like camera, has a lens pivot ring (not shown) at the front end of a lens 102 for pivoting a protective mirror (not shown) or A filter (not shown). The pivot ring 11 is located approximately midway between the filter frame 1 and is pivotally connected to the lens pivot ring. When the pivot ring 11 is pivotally connected to the lens pivot ring, the upper surface 2 is oriented in the direction of the camera 101, that is, the left score group 5 and the right score group 6 are oriented toward the camera 101.

Please refer to FIG. 2, which is another specific embodiment of a filter holder 1 with a black card positioning function. The filter holder 1 includes a left score group 5, a right score group 6, and a filter holder pivot portion 4. The filter frame 1 has an upper surface 2 and a lower surface 3. The left score group 5 and the right score group 6 are respectively disposed on the left and right ends of the upper surface 2 of the filter frame 1. The filter frame pivoting portion 4 is pivotally connected to one of the connector pivoting portions 12 on one side of a connector 10. The other side of the connector 10 is provided with a pivot ring 11. Referring to FIG. 4, the pivot ring 11 is pivotally connected to the lens pivot ring (not shown) of the lens 102 of the camera 101. When the filter frame pivoting portion 4 is pivotally connected to the connector pivoting portion 12 When the pivot ring 11 is pivotally connected to the lens pivot ring (not shown), the upper surface 2 faces the camera 101. The direction, that is, the left score group 5 and the right score group 6 are directions facing the camera 101.

Referring to FIG. 4, the photographer fixes the camera 101 on the stand 103, and then pivots the filter frame 1 with the black card positioning function of the embodiment of FIG. 1 with the pivot ring 11 and the lens pivot ring. Or the filter frame 1 with the black card positioning function of the embodiment of the second and third embodiments is pivotally connected to the connector pivoting portion 12 by the filter frame pivoting portion 4 and the pivoting ring 11 and the lens pivoting ring Pivot, that is, as shown in Figure 4. At this time, the upper surface 2 faces the direction of the camera 101, that is, the left score group 5 and the right score group 6 are oriented toward the camera 101. Therefore, the photographer can clearly see the left score group 5 and the right score group 6 while standing behind the camera 101.

The filter frame pivoting portion includes a groove 41, a fixing portion 43 above the groove 41, and a fixing portion 42 below the groove 41. The connecting member pivoting portion 12 is supported by the groove 41 and the filter. The frame pivoting portion 4 is pivotally connected, and the upper fixing portion 43 and/or the lower fixing portion 42 fix the pivotal connection between the connecting member pivoting portion 12 and the filter frame pivoting portion 4.

The upper fixing portion 43 may be provided with at least one screw, or the lower fixing portion 42 may be provided with at least one screw, or the upper fixing portion 43 and the lower fixing portion 42 are each provided with at least one screw; and by at least one of the above One of the screws is locked to fix the pivotal connection of the connector pivoting portion 12 and the filter frame pivoting portion 4.

When the upper fixing portion 43 is provided with at least one screw, the lower fixing portion 42 can be provided with a card slot (as in the embodiment of FIG. 2). Alternatively, when the lower fixing portion 42 is provided with at least one screw, the upper fixing portion 43 may be provided with a card slot.

Please refer to Fig. 3, which is a combination diagram of the specific embodiment of Fig. 2. When the connector pivoting portion 12 is pivotally connected to the filter frame pivoting portion 4, the screws of the above fixing portion 43 are fixed.

Please refer to FIG. 3A, which is a partial enlargement of part a of the specific embodiment of FIG. Figure. The filter frame 1 has a top left side 8 and a top right side (not shown), which are respectively provided by the left side surface 7 and the right side surface (not shown) of the filter frame 1 and the upper surface 2 of the filter frame 1 form. The following descriptions of the upper left side 8 and the upper right side are also applicable to the specific embodiments of the first, second, and third figures or all other embodiments of the present invention. At least one of the upper left side 8 and the upper right side (not shown) has a chamfer or a rounded corner.

When the upper left edge 8 has a chamfer or a rounded corner, the left score group 5 extends from the left end of the upper surface 2 of the filter frame 1 to the chamfer or rounded corner of the upper left edge 8. Please also refer to Figure 4, at which point the photographer can stand behind the camera 101 or stand at any angle on the left side of the camera 101 to see the left score group 5 and the right score group 6, especially the station. The chamfer or rounded corner of the left score group 5 extending to the upper left edge 8 can also be seen at any angle to the left of the camera 101. This is convenient for the photographer to stand behind the camera 101 or at any angle on the left side of the camera 101.

When the upper right side (not shown) has a chamfer or a rounded corner, the right score group 6 extends from the right end of the upper surface 2 of the filter frame 1 to the chamfer of the upper right side (not shown) or Rounded corners. Similarly, the photographer can stand behind the camera 101 or stand at any angle on the right side of the camera 101 to see the left score group 5 and the right score group 6, especially on the right side of the camera 101. At any angle, you can also see the chamfer or rounded corner of the right score group 6 extending to the upper right. It is so convenient for the photographer to stand behind the camera 101 or at any angle on the right side of the camera 101.

When the upper left side 8 and the upper right side (not shown) have a chamfer or a rounded corner, the left score group 5 extends from the left end of the upper surface 2 of the filter frame 1 to the chamfer of the upper left side 8 or The rounded corners and the right score group 6 extend from the right end of the upper surface 2 of the filter frame 1 to the chamfer or rounded corner of the upper right side (not shown). Similarly, at this time, the photographer can stand behind the camera 101, or stand at any angle on the left side of the camera 101, or stand at any angle on the right side of the camera 101, and can see the left. The score group 5 and the right score group 6, especially when standing at any angle on the left side of the camera 101, can also see the chamfer or rounded corner of the left score group 5 extending to the upper left side 8, or standing on the right side of the camera 101. At any angle, it can also be seen that the right score group 6 extends to the upper right chamfer or rounded corner. It is so convenient for the photographer to stand behind the camera 101, either at any angle to the left of the camera 101 or at any angle to the right of the camera 101.

The following descriptions of the left score group 5 and the right score group 6 are also applicable to the specific embodiments of the first, second, and third figures or all other embodiments of the present invention. The scoring group of the left scoring group 5 and the right scoring group 6 may be a plurality of scorings of the same length or a plurality of scorings of different lengths, or even a plurality of scorings of different lengths and lengths. , and the length and length of the score can be arranged in a variety of different ways. However, the score group of the left score group 5 and the right score group 6 generally corresponds, that is, the length of the score at a position of the left score group 5, and the relative position of the right score group 6 Have the same length of the score. The left score group 5 and the right score group 6 shown in the specific embodiments of Figures 1, 2, and 3 are merely exemplary embodiments, and do not limit the other possibilities of the left score group 5 and the right score group 6. Sex.

Please refer to the 5A and 5B drawings, which are explanatory diagrams in which the filter frame 1 with the black card positioning function is used to assist the shooting with two black cards. In actual operation, as shown in Fig. 4, the camera 101 is fixed on the tripod 103, and the filter holder 1 is mounted. The image screen in the middle of Fig. 5A is a picture of the actual scenery seen through the camera's viewing window. The sky area above the dotted line L1 is a very bright part. Between the dotted line L1 and the dotted line L2, it is a mountain back, a valley, and belongs to a very dark area. The foreground below the dotted line L2 is the flowering knotweed, which is a dark area, but not as dark as between the dotted line L1 and the dotted line L2. After the photographer actually measures the light, it is necessary to expose for 1/2 second in the region above the dotted line L1, 60 seconds for the region between the broken line L1 and the broken line L2, and 20 seconds for the region below the broken line L2. Pick up two black cards and watch them through the viewing window. Will be the first black The card is moved to cover the area above the dotted line L1. At this time, the position of the first black card is observed with respect to the left score group 5 and the right score group 6 of the filter frame 1, respectively, and recorded. Then move the second black card to the area below the dotted line L2, and observe where the second black card is located relative to the left score group 5 and the right score group 6 of the filter frame 1, respectively. And recorded it. If the upper left side 8 and the upper right side of the filter frame 1 have a chamfer or a rounded corner, the photographer can stand behind the camera 101, or stand at any angle on the left side of the camera 101, or stand. Shoot at any angle on the right side of camera 101. At this time, the photographer can move the first black card to the area above the dotted line L1 by the position of the left score group 5 and the right score group 6 recorded above without viewing through the viewing window. And moving the second black card to the area below the dotted line L2. When the photographer presses the shutter, the two black cards are simultaneously shaken up and down by the dotted line L1 and the broken line L2 to avoid black card imaging in the photo; when the shutter exposure time reaches 40 seconds, it is below the broken line L2. Pull out the second black card and continue to shake the first black card slightly above and below the dotted line L1; when the shutter exposure seconds reach 59 and 1/2 seconds, quickly pull the first black card out above the dotted line L1 The shutter is released until the shutter exposure seconds reach 60 seconds. In this way, you can take a picture with a more uniform brightness, as shown in Figure 5B. The exposure time of the photo in the area above the dotted line L1 is only 1/2 second, the exposure time in the area between the broken line L1 and the broken line L2 is 60 seconds, and the exposure time in the area below the broken line L2 is 20 seconds. If there is no auxiliary of the left scoring group 5 and the right scoring group 6 of the filter frame 1, when the shutter is pressed, the light originally entering the camera 101 through the lens 102 and passing through the viewing window will enter the camera from the lens 102. The 101 then goes directly into the photosensitive element of the camera 101, so that the picture seen by the viewing window becomes dark. The photographer can only shake the black card by the impression, and can't effectively cover the area covered by the black card, so that the photos taken are often failed works. For the fleeting scenery, it is impossible to It is very regrettable to grasp the timing of the shooting. Also, sometimes because of shooting For the needs of the scene, the photographer needs to stand at some angle on the left side of the camera 101 or at any angle on the right side of the camera 101. If there is no upper left side 8 or upper right side chamfer or rounded corner of the filter frame 1 The photographer can only stand behind the camera 101 and cannot stand at any angle on the left side of the camera 101 or at any angle on the right side of the camera 101.

Therefore, the left score group 5 and the right score group 6 of the filter frame 1 with the black card positioning function and the chamfer or rounded corner of the upper left side 8 and/or the upper right side of the filter frame 1 are used for black card or stitch card. The photographer of the shooting has great help, so that the photographer can shoot at various positions such as the rear of the camera or the left and right sides, and control the position of the black card or the sewing card stably and accurately to assist the shooting to be more uniform. Photo.

In addition, please refer to Figures 6 and 7 for another specific embodiment of the present invention. The filter frame 1 having a black card positioning function further includes a left filter fixing portion 311 and a right filter fixing portion 312. The left filter fixing portion 311 and the right filter fixing portion 312 are respectively fixed to the left and right ends of the lower surface 3 of the filter frame 1 with at least one screw 32. The left filter fixing portion 311 and the right filter fixing portion 312 each have at least one filter fixing groove 331 and 333. Each of the pair of left and right filter fixing grooves 331 and 333 can fix a filter 104. The number of left and right filter fixing grooves 331 and 333 is usually one pair, two pairs, three pairs, four pairs or even more, and can be used to fix one, two, three, four or even more filters. 104 (filter 104 is not limited to filters that are all identical functions). As exemplified in Fig. 7, there are two pairs of left and right filter fixing grooves 331 and 333, so that two pieces of filter 104 can be fixed.

In addition, each of the left and right filter fixing grooves 331 and 333 has an elastic gasket, which can provide appropriate damping when inserting the filter 104, and is convenient for fixing the filter 104 to the left and right filter fixing grooves 331 and Any position within 333.

The photographer can use the filter frame 1 with the black card positioning function of the creation, while making Use one or more filters 104 with a gradual dimming function and take the black card 100 to take a photo.

The foregoing is a specific embodiment of the present invention and the technical means employed, and many variations and modifications can be derived therefrom based on the disclosure or teachings herein, and can still be regarded as equivalent changes made by the inventive concept. The role of the spirit and the spirit of the text and the scope of the text should be considered within the technical scope of this creation.

In summary, this creation can indeed achieve the intended purpose, and provides a filter frame 1 with black card positioning function, which enables the photographer to stand at various positions such as the rear of the camera or the left and right sides of the camera. And the position of the black card or the sewing card is controlled stably and accurately to assist in the shooting of brighter and more uniform photos. It is extremely valuable for industrial use, and it proposes new patent applications in accordance with the law.

1‧‧‧Black card positioning function filter holder

2‧‧‧ upper surface

3‧‧‧ lower surface

4‧‧‧Filter frame pivoting

41‧‧‧ Groove

42‧‧‧Under the fixed department

43‧‧‧Upper Department

5‧‧‧ Left Scoring Group

6‧‧‧Right score group

10‧‧‧Connecting parts

11‧‧‧ pivot ring

12‧‧‧Connector pivoting

Claims (16)

A filter holder having a black card positioning function for positioning a black card, wherein the filter frame comprises: a filter frame pivoting portion for pivotally connecting with a connecting member pivoting portion on one side of a connecting member; And a left score group and a right score group are respectively disposed on the left and right ends of one of the upper surfaces of the filter frame, wherein the other side of the connector is provided with a pivot ring, the pivot ring Providing pivotal connection with a lens pivot ring of one of the cameras, when the filter frame pivoting portion is pivotally connected to the connecting member pivoting portion, and the pivoting ring is pivotally connected to the lens pivoting ring, The upper surface is oriented in the direction of the camera. The filter frame with black card positioning function according to claim 1, wherein the filter frame has a top left side and a top right side, respectively, by the left and right sides of the filter frame and the filter frame The upper surface is formed, wherein at least one of the upper left edge and the upper right edge has a chamfer such that the left score group and/or the right score group are from the left end of the upper surface of the filter frame And/or the chamfer extending above the right end to the upper left and/or the upper right. The filter frame with black card positioning function according to claim 1, wherein the filter frame has a top left side and a top right side, respectively, by the left and right sides of the filter frame and the filter frame The upper surface is formed, wherein at least one of the upper left edge and the upper right edge has a rounded corner such that the left score group and/or the right score group are from the left end of the upper surface of the filter frame and / or the rounded corner extending above the upper left and/or the upper right. The filter frame with a black card positioning function according to claim 1, wherein the filter frame pivoting portion includes a groove, a fixing portion above the groove, and a groove a lower lower fixing portion, the connecting member pivoting portion is pivotally connected to the filter frame pivoting portion by the groove, and the connecting member pivoting portion is fixed by the upper fixing portion and/or the lower fixing portion The pivotal connection with the filter frame pivoting portion. The filter frame having the black card positioning function according to claim 4, wherein at least one of the upper fixing portion and the lower fixing portion is further provided with at least one screw, wherein the at least one screw is At least one of the keys is locked to fix the pivotal connection of the connecting member pivoting portion and the filter frame pivoting portion. A filter holder having a black card positioning function according to claim 4, wherein the upper fixing portion or the lower fixing portion is a card slot. The filter frame with black card positioning function according to claim 1, further comprising a left filter fixing portion and a right filter fixing portion, wherein the filter frame has a lower surface, the left filter The fixing portion and the right filter fixing portion are respectively disposed at left and right ends of the lower surface of the filter frame for fixing at least one filter. The filter frame having the black card positioning function according to claim 7, wherein the left filter fixing portion and the right filter fixing portion respectively have at least one filter fixing groove, each pair of left and right Correspondingly, the at least one filter fixing slot is configured to fix one of the at least one filter. The filter frame having a black card positioning function according to claim 7, wherein the left filter fixing portion and the right filter fixing portion are respectively fixed to the lower surface of the filter frame by at least one screw. The left and right ends. A filter frame having a black card positioning function for positioning a black card, wherein the filter frame comprises: a pivot ring for pivoting a lens of a lens of one of the cameras; and a left engraving a set of marks and a group of right scores are respectively disposed on an upper surface of the filter frame Above the left and right ends, wherein the pivoting ring is pivotally connected to the lens pivot ring such that the upper surface faces the camera. The filter frame with black card positioning function according to claim 10, wherein the filter frame has a top left side and a top right side, respectively, by the left and right sides of the filter frame and the filter frame The upper surface is formed, wherein at least one of the upper left edge and the upper right edge has a chamfer such that the left score group and/or the right score group are from the left end of the upper surface of the filter frame And/or the chamfer extending above the right end to the upper left and/or the upper right. The filter frame with black card positioning function according to claim 10, wherein the filter frame has a top left side and a top right side, respectively, by the left and right sides of the filter frame and the filter frame The upper surface is formed, wherein at least one of the upper left edge and the upper right edge has a rounded corner such that the left score group and/or the right score group are from the left end of the upper surface of the filter frame and / or the rounded corner extending above the upper left and/or the upper right. The filter frame with black card positioning function according to claim 10, further comprising a left filter fixing portion and a right filter fixing portion, wherein the filter frame has a lower surface, the left filter The fixing portion and the right filter fixing portion are respectively disposed at left and right ends of the lower surface of the filter frame for fixing at least one filter. The filter frame having a black card positioning function according to claim 13 , wherein the left filter fixing portion and the right filter fixing portion respectively have at least one filter fixing groove, each pair of left and right Correspondingly, the at least one filter fixing slot is configured to fix one of the at least one filter. The filter frame having the black card positioning function according to claim 13 , wherein the left filter fixing portion and the right filter fixing portion are respectively fixed to the filter frame by at least one screw The left and right ends of the surface. The filter frame having the black card positioning function according to claim 10, wherein the pivot ring and the lens pivot ring are coupled to each other by screwing.