Telescope with pivoting joint bridge

Description

[0001] The invention relates to a binocular telescope with two tubes which are connected to one another by a hinge bridge which can be pivoted about a hinge axis in order to adjust the interpupillary distance, wherein in each of the two tubes a beam path is formed with a first optical axis of an objective, with a second optical axis of an eyepiece and with a prism erecting system, wherein the first optical axis of the objective and the second optical axis of the eyepiece are offset parallel to one another by a distance so that these axes do not coincide.

[0002] Conventional telescopes of the type mentioned above have the disadvantage that they are often cumbersome to use, since they usually have a relatively large diameter in the area in which a user holds the telescope during use due to their design.

[0003] A binocular telescope is known from DE 15 47 239 A1.

[0004] It is therefore an object of the invention to provide structural measures which allow greater freedom in the design of the external shape of the telescope.

[0005] This object is achieved with a telescope of the type mentioned at the outset by the features of claim 1, wherein the first optical axis of the objective and the second optical axis of the eyepiece lie in a common first plane with the hinge axis of the hinge bridge. Due to the arrangement of the axes, which is different from that of conventional telescopes, the solution according to the invention enables the realization of a low overall height in a central region in which the prism is arranged. Therefore, the solution according to the invention allows the gained installation space to be used to improve ergonomics. Advantageous developments of the invention are specified in the subclaims.

[0006] In order to improve ergonomics, it is provided that an outer side of each tube in a region of the prism erecting system has a waist formed with a circumferential shape deviating from a circular shape, wherein a section running on an upper side of the tube is designed as a first holding recess for a section of a finger following the waist and a section running on an underside of the tube is designed as a second holding recess for a section of a user's thumb following the waist.

[0007] Furthermore, it is advantageous that outer sides of the two tubes each have the waist in a section of their longitudinal extension parallel to the optical axis, in a region of the prism erecting system in a direction perpendicular to the first plane.

[0008] Furthermore, it can be provided that a cross-section normal to the first plane and to the direction of the optical axis through each of the tubes in the region of the waist has its narrowest point in an intersection region of the respective tube with a plane running normal to the direction of the first optical axis of the objective, wherein a ratio of a diameter of the narrowest point of the tube normal to the first plane to a diameter of the housing in the region of the objective has a value of less than 80%, in particular between 60% and 80%, or the ratio has a value which is less than 0.80, in particular has a value which is between 0.60 and 0.80.

[0009] In an advantageous further development, it can be provided that an axially displaceable focusing means is arranged in each of the two tubes, and wherein a common focusing device is designed for displacing the focusing means, wherein the focusing device comprises a housing and a focusing knob rotatable about a rotation axis and the rotation axis is arranged coaxially to the joint axis, and wherein the focusing knob is rotationally coupled to a focusing gear and the focusing gear each comprises a push rod by means of which the focusing gear is coupled to one of the two focusing means, wherein a direction of a longitudinal axis of the push rod encloses an acute angle with a direction of the joint axis.

[0010] According to a preferred embodiment, the joint axis can span a second plane together with the longitudinal axis of the push rod, wherein the first plane and the second plane enclose an acute angle with a value between 0° and 30°, in particular between 10° and 30°.

[0011] Particularly preferably, the direction of the longitudinal axis of the push rod of each tube is aligned obliquely, in particular skewed, with respect to a direction of an optical axis of the tube.

[0012] Advantageously, each tube can have two opposing retaining recesses in the region of its waist, in particular two arranged on sections of the tube rotated by 180° to each other.

[0013] Handling can be further improved by the fact that the holding recesses each have a concave cross-section transverse to the longitudinal direction of the waist.

[0014] It has proven particularly advantageous that a direction of a longitudinal extension of each holding recess runs obliquely to a direction of a longitudinal extension of the tube.

[0015] In order to achieve a very high level of operating comfort, it can be provided that each holding recess of each tube has a first eyepiece-side end region located closer to the eyepiece and a second objective-side end region located closer to the objective, wherein the distance between the respective eyepiece-side end regions of the holding recesses of the two tubes is smaller than the distance between the respective objective-side end regions of the holding recesses of the two tubes.

[0016] Ease of use can be further increased by arranging the holding recesses of the two tubes in a V-shape, with a holding recess of a first of the two tubes forming a first leg of the "V" and a holding recess of a second of the two tubes forming a second leg of the "V".

[0017] According to an embodiment which is very advantageous from an ergonomic point of view, the invention provides that a cross-section normal to the first plane and to the direction of the optical axis through each of the tubes has its widest point in the region of its waist in an intersection region of the tube with the first plane.

[0018] According to the invention, a tip of a roof edge of the prism inversion system is arranged in the region of the widest point and points outward, wherein the shortest distance between the tip of the roof edge and the inner wall of the tube is smaller than the shortest distance between the tip of the roof edge and a surface of the prism inversion system opposite the tip of the roof edge. According to a preferred embodiment of the invention, a second plane runs through the prism inversion system, running through the first holding recess on the top side of the tube and a second holding recess on the bottom side of the tube.

[0019] With regard to a particularly compact design, it has proven advantageous that the prism erecting system includes a Schmidt-Pechan prism system.

[0020] For a better understanding of the invention, it will be explained in more detail with reference to the non-limiting embodiments shown in the following figures.

[0021] They show in a highly simplified, schematic representation: Fig. 1 a perspective view of a binocular telescope; Fig. 2 the binocular telescope of Fig. 1 in a perspective view obliquely from below; Fig. 3 an optical system of the telescope from Fig. 1 ; Fig. 4 a longitudinal section of the focusing device of the telescope from Fig. 1 ; Fig. 5 a cross-section of the focusing device from Fig. 4 ; Fig. 6 a section along the line VI-VI in Fig. 5 ; Fig. 7 a detail of a device for limiting the rotational movement of the focusing knob; Fig. 8 a detail of the focusing device from Fig. 4 in perspective view and partly as exploded view; Fig. 9Parts of the telescope from Fig. 1in a frontal view from the object side; Fig. 10 a cross section through a first tube of the telescope from Fig.1 along line AA in Fig. 9 ; Fig. 11 a cross-section through the first tube of the telescope from Fig. 1 along line BB in Fig. 9 ; Fig. 12 a section along the line DD in Fig. 9 ; Fig. 13a through a first tube of the telescope Fig.1 along the line DD in Fig. 9 ; Fig. 14 a longitudinal section through a push rod of a focusing gear; Fig. 15 a perspective view of a tube of the telescope from Fig. 1 ; Fig. 16 a longitudinal section through the tube from Fig. 15 ; Fig. 17 a section along the line IX-IX in Fig. 1 ; Fig. 18 a detail of the lens mount with the joint head arrangement of the push rod according to Fig. 12 , corresponding to a view parallel to the line XIX-XIX as in Fig. 9 shown; Fig. 19 a cross-section of the detail corresponding Fig. 18 ; Fig. 20 a detail of the eyepiece-side end region of the binocular telescope in plan view; Fig. 21 the detail of the eyepiece-side end region according to Fig. 20 shown partially cut.

[0022] By way of introduction, it should be noted that in the variously described embodiments, identical parts are provided with identical reference symbols or component designations, whereby the disclosures contained in the entire description can be applied mutatis mutandis to identical parts with identical reference symbols or component designations. Furthermore, the positional information chosen in the description, such as top, bottom, side, etc., refers to the directly described and illustrated figure, and in the event of a change in position, these positional information must be applied mutatis mutandis to the new position.

[0023] The Fig. 1shows a pair of binoculars or a binocular telescope 1 shown in perspective. This comprises a first tube 2-1 and a second tube 2-2 with optical systems accommodated therein for the magnified display of a distant object. To connect and arrange the two tubes 2-1, 2-2 in parallel, an articulated bridge 5 is formed between them. According to this embodiment of the binocular telescope 1, a first articulated bridge 5-1 and a second articulated bridge 5-2, spaced longitudinally therefrom, with a common articulated axis 4 are provided. Thus, the two tubes 2 can be pivoted relative to one another about this articulated axis 4, and in this way the interpupillary distance or the interpupillary distance 3 can be adjusted for different users.

[0024] To focus the image through the two optical systems in the two tubes 2-1, 2-2, a focusing device 7 is provided, which is arranged between the first articulated bridge 5-1 and the second articulated bridge 5-2. The focusing device 7, in turn, comprises a housing 8 and a focusing knob 10 with a rotation axis 9. The rotation axis 9 of the focusing knob 10 is arranged coaxially to the joint axis 4 of the articulated bridges 5-1, 5-2. The focusing device 7 also comprises a diopter ring 23. This can also be pivoted about the rotation axis 9.

[0025] The Fig. 2 shows the binocular telescope 1 according to Fig. 1 in a perspective view from below. The focusing knob 10, which is formed with a knurled casing, can be seen from both a top side ( Fig. 1 ) as well as from a subpage ( Fig. 2) of the binocular telescope 1. Thus, it is possible for a user to grasp one of the two tubes 2-1, 2-2 and, at the same time, to act on the focusing knob 10 with his fingers from both the bottom and the top.

[0026] The Fig. 3 shows an example of an optical system 24 of the two tubes 2-1, 2-2 of the binocular telescope 1.

[0027] In object side (left side in Fig. 3), the optical system 24 comprises an objective lens 18, a focusing lens 6, a prism inverting system 20, a field lens 25, and an eyepiece lens 19. Where the term "lens" is used here and below for the sake of simplicity, it should be noted for the sake of clarification that this may also refer to a system of several individual lenses. The prism inverting system 20 comprises an inverting prism of the Schmidt-Pechan type. It should be noted at this point that other prism inverting systems, such as an Abbe-König prism or an Uppendahl prism, could also be used instead of a Schmidt-Pechan prism.

[0028] According to this embodiment, the prism erecting system 20 is dimensioned such that a parallel offset by a distance 21 is formed between a first optical axis 17-1 of the objective lens 18 and a second optical axis 17-2 of the eyepiece lens 19. The optical system 24 of the two tubes 2-1, 2-2 of the telescope 1 has a so-called internal focusing. To focus the image, the internal focusing lens 6 is displaced in the axial direction of the optical axis 17-1, 17-2, wherein the rotational movement of the focusing knob 10 is transmitted via a focusing gear 11 ( Fig. 4 ) is converted into a longitudinal movement and corresponding displacement of the focusing lens 6.

[0029] The Fig. 4 shows a longitudinal section of the focusing device 7 of the telescope 1 in detail with parts of the focusing lenses 6 ( Fig. 3) leading focusing gear 11-1, 11-2. The focusing device 7 has as central elements the housing 8 and the focusing knob 10, which is rotatably mounted about the rotation axis 9. The housing 8 of the focusing device 7 is rotationally fixedly fastened to one of the two tubes 2-1, 2-2 in the area of ​​the articulated bridge 5-1. This fastening of the housing 8 of the focusing device 7 takes place jointly on an articulated axis 29 of the articulated bridge 5 of the two tubes 2. The axle nut 30 and lock nut 31 used for this purpose are also in the Fig. 4shown. A threaded spindle 12 is arranged inside the housing 8 and can be displaced in the axial direction (rotation axis 9). To transmit the axial adjustment movement of the threaded spindle 12 to the focusing lens 6 or the lens mount 26 of the focusing lens 6, the focusing device 7 has a push rod 27. A driver 28 attached to an eyepiece-side end region of the push rod 27 engages the threaded spindle 12 for this purpose.

[0030] One end of the push rod 27 can be arranged in one of the tubes 2-1, 2-2 and another end of the push rod 27 in the joint bridge 5.

[0031] The Fig. 5 shows the cross section of the focusing device 7 according to Fig. 4 , wherein its housing 8, the threaded spindle 12 and the focusing knob 10 are shown in a separated or disassembled state.

[0032] The threaded spindle 12 comprises an inner sleeve 32 with a front adjusting disc 33 and a rear adjusting disc 34. A driver head 35 of the driver 28 extends between mutually facing end faces of the front adjusting disc 33 and the rear adjusting disc 34, wherein the front adjusting disc 33 on the one hand and the rear adjusting disc 34 come into contact with the driver head 35 and in this way an axial displacement of the threaded spindle 12 is converted into a corresponding movement of the push rods 27-1, 27-2.

[0033] For the attachment of the front adjusting disc 33 and the rear adjusting disc 34 to the inner sleeve 32 of the threaded spindle 12, the two adjusting discs 33, 34 are arranged on a cylindrical section of the inner sleeve 32, with the rear adjusting disc 34 coming into contact with a radially projecting shoulder of the inner sleeve 32. On the other hand, a compression spring 36 formed by a spiral spring is attached to the inner sleeve 32, which, in the prestressed state, holds the front adjusting disc 33, the driver head 35, and the rear adjusting disc 34 pressed against one another.

[0034] An axle sleeve 37 is arranged inside the housing 8 of the focusing device 7 and connected to the housing 8. This axle sleeve 37 of the focusing device 7 serves as a straight guide for the threaded spindle 12. The inner sleeve 32 of the threaded spindle 12 is displaceable in the axial direction on the axle sleeve 37 of the housing 8.

[0035] For the displacement of the threaded spindle 12 on the axle sleeve 37 in the direction of the rotation axis 9, a slot 38 extending in the longitudinal direction of the axle sleeve 37 is provided according to this embodiment ( Fig. 6 ). And on the other hand, a guide pin 39 is arranged on an inner circumference of the inner sleeve 32 of the threaded spindle 12, which guide pin 39 projects inwardly and engages in the slot 38 of the axle sleeve 37. This means that in the assembled state of the focusing device 7, the guide pin 39 extends through the slot 38 of the axle sleeve 37. As a result, the movement of the threaded spindle 12 is limited to a translation 45 in the direction of the rotational axis 9 ( Fig. 7 ). In order to effect this translation 45 by turning the focusing knob 10, a thread 40 is formed on an outer circumference of the threaded spindle 12, onto which a corresponding internal thread 41 of a drive bushing 42 of the focusing knob 10 engages.

[0036] In the assembled state, the drive bushing 42 of the focusing knob 10 is rotatably mounted in the housing 8 of the focusing device 7. Thus, according to this embodiment, the focusing knob 10 is fixed in the axial direction (rotation axis 9). Turning the focusing knob 10 thus causes an axial displacement of the threaded spindle 12 with the two adjusting discs 33, 34, which subsequently displaces the focusing lenses 6 in the axial direction via the drivers 28-1, 28-2 and the push rods 27-1, 27-2 ( Fig. 3 ).

[0037] The Fig. 6 shows the focusing knob 10, the threaded spindle 12 and the housing 8 of the focusing device 7 shown in section according to Fig. 5The illustration corresponds to a viewing direction rotated by 90°. The slot 38 extending longitudinally along the axle sleeve 37, in which the guide pin 39 slides, is more clearly visible. The slot 38 can also be designed as an elongated hole.

[0038] In the described telescope 1 and the focusing device 7, the rotation range or angle of the focusing knob 10 relative to the housing 8 of the focusing device 7 is limited by a stop at both ends of the rotation range, wherein the rotation range amounts to more than 360°. The stops 13-1, 13-2 are arranged offset from one another. For example, the stops 13-1, 13-2 can be offset from one another with respect to a longitudinal direction of the rotation axis 9 or around the rotation axis 9.

[0039] The focusing knob 10 comprises a stop bolt or a stop element 43, which is connected to the focusing knob 10 in a rotationally fixed manner. In the assembled state of the focusing knob 10 and the housing 8 of the focusing device 7, this stop element 43 extends inside the axle sleeve 37 of the housing 8. The stop element 43, like the axle sleeve 37, is arranged coaxially to the common axis of rotation 9 of the focusing knob 10. A thread-like groove 44 is formed or molded into an outer cylindrical surface of the stop element 43. In the assembled state, the guide pin 39 of the inner sleeve 32 of the threaded spindle 12 also extends into the groove 44 ( Fig. 4 ).

[0040] The Fig. 7 shows a detail of the device for limiting the rotational movement of the focusing knob 10 in an end position, according to Fig. 4, shown in perspective. For reasons of clarity, only the stop element 43 of the focusing knob 10 and the guide pin 39 of the threaded spindle 12 are shown.

[0041] As can be seen from the Figs. 5 and 6When the focusing knob 10 is turned, the guide pin 39 is moved in the direction of the longitudinal extent of the slot 38 of the axle sleeve 37 (in the direction of the rotation axis 9). It therefore only performs a translation 45. On the other hand, the stop element 43 performs a pure rotational movement 46 when the focusing knob 10 is turned. The movement of the guide pin 39 relative to the stop element 43 is that of a screw movement, with the guide pin 39 moving along the helical groove 44. The height of one turn of the groove 44 is equal to the pitch of the intermeshing threads of the threaded spindle 12 and the focusing knob 10 (thread 40, internal thread 41). It is provided that the arc length of the groove 44 (the length corresponding to a helical line) is limited by a first stop 13-1 and a second stop 13-2. These stops 13-1, 13-2 are actuated by a front or rear stop.a rear inner wall of the groove 44 is formed, wherein these inner walls are preferably aligned approximately perpendicularly with respect to a direction of relative movement between the guide pin 39 and the groove 44. The rotational movement of the focusing knob 10 therefore ends at a precisely defined angle of rotation, namely when the front stop 13-1 or the rear stop 13-2 comes into contact with the guide pin 39. The second situation is precisely the one described in the . Fig. 7 is shown, with the rear stop 13-2 resting on the guide pin 39.

[0042] In an alternative embodiment of the device for limiting the rotational movement of the focusing knob 10, the two stops 13-1, 13-2 on the stop element 43 are formed by independent stop bodies that project radially from an outer cylindrical surface of the stop element 43. Such an alternative design of the stop element 43 accordingly also requires less material for its manufacture.

[0043] The limitation of the rotational movement or the achievable angle of rotation of the focusing knob 10 achieved in this way particularly advantageously prevents jamming of the intermeshing threads 40, 41. By forming the groove 44 on the stop element 43 with a preselected arc length, a precisely defined angle of rotation range for adjusting the focusing knob 10 and thus also the adjustment range of the focusing lenses 6 can be precisely specified. This prevents unintentional jamming of the focusing device 7, which would be equivalent to tightening a screw connection.

[0044] Based on the illustrations in the Fig. 5, 6 and the Fig. 8 The design of a device for diopter compensation on the focusing device 7 of the telescope 1 is described below. Fig. 8 shows a detail of the focusing device 7 ( Fig. 4) in perspective and partly as an exploded view. At an eyepiece-side end area of ​​the housing 8, the diopter ring 23 is pivotably mounted with respect to the rotation axis 9 ( Fig. 5, 6 ).

[0045] As already mentioned in connection with the description of the Fig. 5 As mentioned, the two adjusting discs 33, 34 are arranged on a cylindrical section of the inner sleeve 32 of the threaded spindle 12. According to their fastening, the two adjusting discs 33, 34 can also be pivoted on the inner sleeve 32 with respect to the rotation axis 9, whereby this pivoting can be effected by actuating the diopter ring 23. As can be seen from the illustration in Fig. 8As can be clearly seen, the diopter ring 23 has a driver arm 47. The driver arm 47 extends, protruding from the annular section of the diopter ring 23, parallel to the axis of rotation 9 in the direction of the lens. Corresponding to the cross-section of the driver arm 47, the adjusting discs 33, 34 have recesses 48-1, 48-2 on their circumference. By the driver arm 47 of the diopter ring 23 engaging in the recesses 48-1, 48-2 of the adjusting discs 33, 34, the latter can be pivoted relative to the axis of rotation 9 by actuating the diopter ring 23.

[0046] As described above, Figs. 5 and 6As has also already been explained, a driver head 35 of the drivers 28 of the two push rods 27-1, 27-2 is carried along lying between mutually facing end faces of the front adjusting disc 33 and the rear adjusting disc 34 and in this way a corresponding displacement of the focusing lenses 6 takes place when the threaded spindle 12 is axially displaced. Independently of an axial displacement of the threaded spindle 12, an additional displacement of one of the two focusing lenses 6 can now also be achieved by pivoting the diopter ring 23. For this purpose, sections or partial areas of the end faces of the two adjusting discs 33, 34 that come into contact with the driver heads 35 are designed to have different profiles. In particular, one of the two partial areas has circular ring-shaped sides, while the other partial area has thread-like or helical sides.Accordingly, in a first partial area, a helical first guideway 49-1 and in a second partial area, a circular second guideway 49-2 are formed by the two adjusting discs 33, 34.

[0047] To clarify this, the Fig. 8 The arrangement of the two adjusting discs 33, 34 is also shown from the rear, i.e., in a side view marked with "R." According to this design of the two adjusting discs 33, 34, an additional displacement of the focusing lens 6 of the first tube 2-1 (thread-like guide track 49-1) occurs upon actuation of the diopter ring 23. However, pivoting the arrangement of the two adjusting discs 33, 34 upon actuation of the diopter ring 23 does not cause a displacement of the focusing lens 6 of the second tube 2-2 (circularly extending second guide track 49-2).

[0048] Furthermore, regarding the structural design of the diopter ring 23, it should be noted that its annular section is arranged on the outer circumference of the housing 8 of the focusing device 7. The driver arm 47 of the diopter ring 23 extends into the interior of the cylindrical casing-shaped housing 8 in order to be able to interact with the recesses 48-1, 48-2 on the adjusting discs 33, 34. As can be seen more clearly in the cross section according to Fig. 6 As can be seen, the driver arm 47 has a radially extending section with which it is connected to the annular section of the diopter ring 23. The housing 8 of the focusing device 7 has, in the eyepiece-side end region of its cylindrical section, a slot 50 extending over a partial area of ​​the circumference, through which the driver arm 47 extends ( Fig. 8 ).

[0049] In the cylinder-jacket-shaped section of the housing 8, a first window 51-1 and a second window 51-2 are also formed ( Fig. 5 , 8 ), through which each of the two drivers 28-1, 28-2 of the focusing gear 11 extends. Thus, the driver heads 35-1, 35-2 of the drivers 28-1, 28-2 can engage in the adjusting discs 33, 34 and transmit an axial displacement to the push rods 27-1, 27-2 ( Fig. 4 ).

[0050] The Fig. 9shows a representation of parts of the binocular telescope 1 in a frontal view from the object side in a viewing direction parallel to the joint axis 4. Of the binocular telescope 1, only the focusing device 7 (recognizable by the focusing knob 10 and the focusing gear 11-1) with the drivers 28-1, the push rod 27-1, and the lens mount 26-1 of the focusing lens 6 of the first tube 2-1 are shown. In addition, one of the lenses of the eyepiece 19 is also shown. The optical axes parallel to the joint axis 4 and the rotation axis 9, i.e., the first optical axis 17-1 of the objective 18 and the second optical axis 17-2 of the eyepiece 19, each appear in this representation as a point in the plane of the drawing (projecting). As in the description of the Fig. 3 As already mentioned, the first optical axis 17-1 of the objective 18 and the second optical axis 17-2 of the eyepiece 19 are offset parallel to each other by the distance 21.

[0051] It is intended that the first optical axis 17-1 of the objective 18, the second optical axis 17-2 of the eyepiece 19, and the joint axis 4 of the joint bridge 5 lie in a common plane 22. This is also the case in an analogous manner with the arrangement of the optical system 24 in the second tube 2-2, which is arranged symmetrically to the first tube 2-1.

[0052] In the Fig. 10 is a cross-section through the first tube 2-1 with respect to a plane passing through the plane 22 ( Fig. 9 ) formed sectional plane. This means that the representation corresponds to a viewing direction perpendicular to the plane 22 containing the first optical axis 17-1 of the objective 18, the second optical axis 17-2 of the eyepiece 19 and the joint axis 4. The alignment of the prism erecting system 20 in Fig. 10 corresponds to that already in Fig. 3Likewise, the distance 21 between the first optical axis 17-1 of the objective 18 and the second optical axis 17-2 of the eyepiece 19 appears undistorted in the figure.

[0053] The Fig. 11 shows a cross-section of the first tube 2-1 with respect to a section plane "BB" containing the second optical axis 17-2 of the eyepiece 19 and perpendicular to the plane 22 ( Fig. 9 ). As this illustration of the tube 2-1 shows, an outer side 52-1 of a tube housing 57 has a waist 53 in the area of ​​the prism inverting system 20.

[0054] The waist 53 is formed with a peripheral shape that deviates from a circular shape. A section running along an upper side of the tube 2-1 is formed as a holding recess 14-1 following the waist 53 for a section of a finger, as shown in Figs. 15 and 16is shown. A section running along an underside of the tube 2-1 is designed as a holding recess 14-2 following the waist 53 for a section of a user's thumb.

[0055] A plane 66 passing through the holding recess 14-1 on the top side of the tube 2-1 and a plane 66 passing through the holding recess 14-2 on the bottom side of the tube 2-1 passes through the prism inversion system 20 or intersects it.

[0056] As well as from Figs. 15 and 16 As can be seen, each holding recess 14-1, 14-2 can have a concave cross-section transverse to the longitudinal direction of the waist 53.

[0057] A longitudinal direction 67 of each holding trough 14-1, 14-2 can extend obliquely to a longitudinal extension of the tube 2-1 (optical axes 17-1, 17-2). Furthermore, a longitudinal direction 67-1 of the holding trough 14-1 extending on the upper side and / or a longitudinal direction 67-2 of the holding trough 14-2 extending on the lower side can enclose at least an angle 68 between 35° and 90° with a direction of the joint axis 4. The longitudinal direction 67 of a holding trough 14 is to be understood as the direction of a course of the valley floor of the holding trough 14, as shown in the Figs. 15 and 16 is indicated by dashed lines. This means that the sequence of points of the local minima of the radial distances from the intersection curves containing the optical axis 17-1 or 17-2 through the outer side 52 of the tube housing 57 indicates the longitudinal direction 67.

[0058] Furthermore, each holding recess 14-1, 14-2 of each tube 2-1 can have a first eyepiece-side end region closer to the eyepiece 19 and a second objective-side end region closer to the objective 18. The distance between the respective eyepiece-side end regions of the holding recesses 14-1, 14-2 of the two tubes 2-1, 2-2 is smaller than the distance between the respective objective-side end regions of the holding recesses 14-1, 14-2 of the two tubes 2-1, 2-2. Each tube 2-1, 2-2 has, in the region of its waist 53, two opposing holding recesses 14-1, 14-2, in particular two arranged on sections of the tube 2-1, 2-2 rotated by 180° to one another. This means that holding recesses 14-1, 14-2 of the binocular telescope 1 are offset from one another with respect to a rotation of 180° relative to the optical axes 17-1, 17-2.

[0059] The holding troughs 14-1, 14-2 of the two tubes 2-1, 2-2 can converge in a V-shape, with a holding trough 14-1, 14-2 of a first of the two tubes 2-1, 2-2 forming a first leg of the V and a holding trough 14-1, 14-2 of a second of the two tubes 2-1, 2-2 forming a second leg of the V ( Fig. 1 ). A tip of the V can lie in the area of ​​the focusing knob 10. Alternatively, imaginary extensions of the longitudinal extensions 67-1, 67-2 of the holding recesses 14-1, 14-2, which maintain an orientation of the holding recesses 14-1, 14-2, can also run through the focusing knob 10, or the focusing knob 10 can be arranged between an imaginary extension of the longitudinal extensions 67-1, 67-2, which maintains the orientation of the holding recesses 14-1, 14-2.

[0060] A value of a diameter 54 of the waist 53 measured perpendicularly with respect to the plane 22 is related to a value of a diameter 55 of a cylinder jacket 56 circumscribing the outer side 52 of the tube 2 in a ratio of less than 80%, preferably approximately 67% ( Fig. 11 ). The outer sides 52 of the two tubes 2-1, 2-2 are preferably shaped in such a way that a ratio of the diameter 54 of the waist 53 to the corresponding diameter 55 of the cylinder jacket 56 enveloping the outer side 52 lies in a range between 0.60 and 0.80 (or between 60% and 80%).

[0061] In other words, a cross-section through each of the tubes 2-1, 2-2 in the region of the waist 53, which is oriented normal to the first plane 22 and to the direction of the optical axis 17-1, 17-2 (corresponding to plane 66), has its narrowest point with respect to a direction perpendicular to the first plane 22 ( Fig. 9 , 11). A ratio of a clear height 69 of the narrowest point of the tube 2-1, 2-2 normal to the first plane 22 to a maximum free diameter 70 of the objective 18 has a value of less than 80%, in particular between 60% and 80%. As described above - introductory to the figure description of the Fig. 11 As already mentioned, the waist 53 has a circumferential shape that deviates from a circular shape. Therefore, the diameters of the tubes 2-1, 2-2 in the region of the waist 53, measured perpendicularly with respect to the optical axes 17-1, 17-2, have different values ​​depending on the direction—unlike a circular cross-section. This means that the diameter 54 of the waist 53 measured perpendicularly with respect to the plane 22 corresponds to the narrowest point, while diameters measured in other directions have larger values.

[0062] The waisting of the outer sides 52 of the tubes 2-1, 2-2 is advantageous in that it enables a user to grasp and hold the binocular telescope 1 particularly comfortably and at the same time securely.

[0063] According to a first example of the design of the outer sides 52 of the tubes 2-1, 2-2, the diameter 55 has a value of 51.5 mm and the diameter 54 of the waist 53 has a value of 35 mm. The value of the maximum free diameter 70 of the lens 18 for these tubes 2-1, 2-2 is 42 mm, and the value of the clear height 69 at the narrowest point is 29 mm.

[0064] A second embodiment of the tubes 2-1, 2-2 provides the following values: value of the diameter 55 of the cylinder jacket 56, which is conceived to circumscribe the outer sides 52 of the tube 2, equal to 44.5 mm; value of the diameter 54 of the waist 53 equal to 33.5 mm; value of the maximum free diameter 70 of the objective 18 equal to 32 mm and value of the clear height 69 of the narrowest point of the tube equal to 25.5 mm.

[0065] The corresponding values ​​for the two examples are clearly summarized in the following table. Columns 6 to 9 of this table also provide values ​​for characteristic ratios from the quantities in columns 2 to 5. Example D55 [mm] D54 [mm] D69 [mm] D70 [mm] V54 / 55 V54 / 70 V69 / 70 V(55-54) / 70 1 51,5 35 29 42 0,68 0,83 0,69 0,39 2 44,5 33,5 25,5 32 0,75 1,05 0,80 0,34

[0066] The column headings in the table mean: D55: Diameter 55 of the cylindrical jacket 56 circumscribing the outer side 52 of the tube 2; D54: Diameter 54 of the waist 53 measured perpendicular to the plane 22; D69: Clear height 69 of the narrowest point of the tubes 2-1, 2-2 measured perpendicular to the plane 22; D70: Maximum free diameter 70 of the objective 18; V54 / 55: Ratio of diameter 54 to diameter 55; V54 / 70: Ratio of diameter 54 to diameter 70; V69 / 70: Ratio of diameter 69 to diameter 70; V(55-54) / 70: Ratio of the difference between diameter 55 and diameter 55 to diameter 70.

[0067] The external shape of the tubes 2-1, 2-2 of the binocular telescope 1 is particularly well characterized by the ratio of the difference between the two diameters 55, 54 to the maximum free diameter 70 of the objective 18 (table, column 9). The value of this ratio for the binocular telescope 1 according to the invention is in a range greater than 0.20, preferably in a range between 0.30 and 0.60.

[0068] Furthermore, values ​​of the distance 21, by which the first optical axis 17-1 of the objective 18 and the second optical axis 17-2 of the eyepiece 19 are offset relative to each other, should also be mentioned at this point. In Example 1, the distance 21 has a value of 3.2 mm and in Example 2 a value of 2.9 mm. Values ​​of the distance 21 in a range of 2 mm to 10 mm have proven advantageous.

[0069] This design of the outer shape of the binocular telescope 1 or the outer shape of the tube housing 57 is also facilitated by the fact that, according to this embodiment, a special design of the prisms of the prism erecting system 20 is also implemented. Compared to the theoretical basic shape of the two prisms of a Schmidt-Pechan prism, in the present design, protruding corners in the radial direction - with respect to the optical axis 17-1, 17-2 - are replaced by bevels, as best shown in Fig. 3 , but also in Fig. 17 , can be seen.

[0070] The Fig. 12 shows a cross-section of the binocular telescope 1 in a reduced representation according to Fig. 9 The parts of the binocular telescope 1 shown are the same as in Fig. 9 to a lens representing the eyepiece 19 and the focusing device 7 with the focusing gear 11 and the lens mount 26 of the focusing lens 6 ( Fig. 3). The Fig. 12 The cross-section shown corresponds to a sectional plane defined by a plane 59 containing the joint axis 4 (or the rotation axis 9) and the longitudinal axis 15 of the push rod 27. The push rod 27 is oriented obliquely with respect to the joint axis 4, wherein—according to this exemplary embodiment—its longitudinal axis 15 forms an acute angle 58 with the joint axis 4 having a value of 7°. The value of the angle 58 is preferably selected from a range between 0° and 30°. However, with respect to the first optical axis 17-1 of the objective 18 and the second optical axis 17-2 of the eyepiece 19, the longitudinal axis 15 is arranged in a so-called skewed position.

[0071] The arrangement of the different axes relative to each other is better in the representation of the Fig. 9can be seen. The joint axis 4, on the one hand, spans the common plane 22 with the optical axes 17-1, 17-2 and, on the other hand, together with the longitudinal axis 15 of the push rod 27, the common plane 59. These two planes, i.e., plane 22 and plane 59, form an angle 60 with a value in a range between 0° and 30°, in particular between 10° and 30°. In the example shown, the angle 60 has a value of 12°. This arrangement or orientation of the push rod 27 is implemented by a corresponding bore in the tube housing 57, which extends from the area of ​​the joint bridge 5-1, 5-2 or the area of ​​the focusing device 7 to the lens mount 26 of the focusing lens 6 ( Fig. 13 ). The push rod 27 can thus be moved back and forth in the tube housing 57 in the direction of its longitudinal axis 15.

[0072] The Fig. 13shows a cross-section of the first tube 2-1 of the binocular telescope 1 according to a sectional plane formed by the plane 59. This means that the sectional plane contains the joint axis 4 and the longitudinal axis 15 of the push rod 27-1 ( Fig. 9 ). As already mentioned above, the tube housing 57 has a bore or a guide tunnel 61 in which the push rod 27-1 is mounted. The guide tunnel 61 therefore extends from the interior of the tube housing 57, in the area of ​​the lens mount 26 of the focusing lens 6, into the area of ​​the first articulated bridge 5-1, where it opens outwards at an eyepiece-side end face of the first articulated bridge 5-1. Furthermore, a window 62 is formed in the tube housing 57 between the guide tunnel 61 and the focusing device 7, directed radially toward the joint axis. Through this window 62, the driver 28-1 extends from the push rod 27-1 into the housing 8 of the focusing device 7 ( Fig. 12). The arrangement of the push rods 27-1, 27-2 in the binocular telescope 1 is thus provided such that they run from the interior of the tube housing 57 into the first joint bridge 5-1.

[0073] The design of the binocular telescope 1 with the described, obliquely arranged push rods 27 and the corresponding guide tunnels 61 in the tube housings 57 of the tubes 2-1, 2-2 offers the possibility, particularly during assembly of the binocular telescope 1, of easily adjusting the focusing device. Such adjustment is possible by using a suitable tool to act on the eyepiece-side end region of the push rod 27 through the eyepiece-side end of the guide tunnel 61. The push rods 27 are, as will be explained below with reference to the Fig. 14As described below, their length is telescopically adjustable. When mounting the binocular telescope 1, a central basic position for the required adjustment ranges can be set for both focusing and diopter adjustment.

[0074] The Fig. 14 shows the push rod 27-1 shown as a longitudinal section with respect to its longitudinal axis 15-1. The push rods 27-1, 27-1 are preferably straight. The push rod 27-1 comprises as main components an inner rod 63 and a push sleeve 64. In the Fig. 14Additionally, a sliding bushing 65 is shown, through which the push rod 27-1 is mounted in the guide tunnel 61. The inner rod 63 and the push sleeve 64 are preferably formed with intermeshing threads and can thus be adjusted in their relative length to one another in the direction of the longitudinal axis 15-1. The driver 28-1 is fastened to an eyepiece-side end of the push sleeve 64. On the other hand, an objective-side end of the inner rod 63 is formed with a joint head arrangement 71. This joint head arrangement 71, in turn, engages with a joint socket 72 of the lens mount 26 of the focusing lens 6. According to this embodiment, the joint socket 72 is formed by a fork projecting laterally from the lens mount 26 of the focusing lens 6 (see also Figs. 9, 12). When the push rod 27-1 is adjusted in the direction of the longitudinal axis 15-1, a compensating movement in the radial direction between the joint head arrangement 71 and the fork-shaped joint socket 72 is possible. The joint head arrangement 71 is preferably also designed with a preloaded spring element and a disc, by means of which a play-free contact between the corresponding contact sides of the joint socket 72 and the joint head arrangement 71 on the other hand is achieved in both adjustment directions. For the transmission of movements from the focusing knob 10 to the focusing lens 6, overall mechanical play-freeness can thus be achieved.

[0075] The coupling or the mutual engagement of the push rod 27 and the lens mount 26 of the focusing lens 6 is determined by the Figs. 18 and 19 explained in more detail. The Fig. 18 shows a detail of the lens mount 26 with the joint head arrangement 71 of the push rod 27 according to Fig. 12The illustration corresponds to a lateral plan view of the lens mount 26 according to a viewing direction parallel to the section plane "XIX-XIX" as in Fig. 9 displayed.

[0076] The Fig. 19shows a cross-section corresponding to a sectional plane containing the optical axis 17-1 with the focusing lens 6, the joint socket 72 of the lens mount 26, and the joint head assembly 71 of the push rod 27. The joint head assembly 71 is attached to the inner rod 63 of the push rod 27 by means of a joint head base 76. For this purpose, the joint head base 76 is screwed into the objective-side end of the inner rod 63. On the other hand, a cylindrical section of a joint head 77 is attached to the joint head base 76. On the other hand, a sliding disk 78 and a compression spring 79 are mounted on the cylindrical section of the joint head 77. The compression spring 79 is arranged such that it is supported on the one hand on the sliding disk 78 and on the other hand on a disk-shaped projection of the joint head base 76.The compression spring 79 is installed in a preloaded state, and in this way the fork-shaped joint socket 72 of the lens mount 26 of the focusing lens 6 is clamped or tensioned between the sliding disk 78 and the joint head 77. The transmission of movement from the push rod 27 to the lens mount 26 of the focusing lens 6 can thus take place without mechanical play. On the other hand, when the lens mount 26 is adjusted, a radial compensating movement of the joint head 77 in the joint socket 72 is possible with respect to the optical axis 17-1. When shaping the joint socket 72 of the lens mount 26, it is also provided that a flank 80 on the eyepiece side or facing the sliding disk 78 has an inclination or slant corresponding to the longitudinal axis 15 of the push rod 27. This allows the sliding disk 78 to rest almost completely on the flank 80 of the joint socket 72.In particular, jamming of the sliding disc 78 on the cylindrical section of the joint head 77 is avoided.

[0077] The inner rod 63 and the sliding sleeve 64 of the push rod 27-1 are also provided so that the inner rod 63 extends through the sliding sleeve 64 in the direction of the longitudinal axis 15-1 and protrudes therefrom beyond the eyepiece-side end region. A slot in the eyepiece-side end region of the inner rod 63 allows the insertion of a screwdriver, for example, with which a length change or an adjustment can be made on the push rod 27-1.

[0078] As can be seen from a summary of the Fig. 10 and the Fig. 17As can be seen, the tube 2-1 has the greatest distance between opposing inner sides and thus its widest point in a cross-section of the tube 2-1 corresponding to the first plane 22 in a section covering the prism inversion system 20 (in a longitudinal region overlapping the prism inversion system 20). A cross-section normal to the first plane 22 and to the direction of the optical axis through the tube 2-1 in the region of the waist 53 thus has its widest point in an intersection area of ​​the tube 2-1 with the first plane 22. This "widest point" referred to here corresponds to the "narrowest point" already mentioned above, as in Fig. 11 shown (corresponding to level 66).

[0079] A tip 73 of a roof edge 74 of the prism erecting system 20 is arranged in an area of ​​the widest point and pointing outwards ( Fig. 10). The shortest distance between this tip 73 of the roof edge 74 and the inner wall of the tube 2-1 is smaller than the shortest distance between the tip 73 of the roof edge 74 and the optical axis 17-1 of the objective 18 and / or the optical axis 17-2 of the eyepiece 19.

[0080] The tip 73 of the roof edge 74 of the prism inversion system 20 is thus arranged in the area of ​​the widest point and pointing outwards, so that the shortest distance between the tip 73 of the roof edge 74 and the inner wall of the tube 2-1 is smaller than the shortest distance between the tip 73 of the roof edge 74 and a surface 75 of the prism inversion system 20 opposite the tip 73 of the roof edge 74.

[0081] Based on the following Figs. 20 and 21 An alternative embodiment of a device for diopter compensation in the binocular telescope 1 is described. Fig. 20shows a detail according to a plan view of the eyepiece-side end area of ​​the binocular telescope 1. The illustration corresponds to a viewing direction of the binocular telescope 1 parallel to the longitudinal axis 15 of the push rod 27 ( Fig. 12 ). In this embodiment of the diopter compensation device, a diopter ring 81 is provided, which is arranged asymmetrically to the joint axis 4 of the tubes 2-1, 2-2 of the telescope 1. This diopter ring 81 is arranged in a region between the joint axis 4 and the first tube 2-1. It is positioned in particular in the region of the first joint bridge 5-1 and in particular close to the eyepiece-side end region of the push rod 27-1 ( Fig. 1 , 12 ).

[0082] The Fig. 21shows a detail of the articulated bridge 5-1 of the telescope 1 with the diopter ring 81 shown partially in section. The illustration again corresponds to a viewing direction parallel to the longitudinal axis 15 of the first push rod 27-1. According to this embodiment of the telescope 1, a diopter gear 82 is provided between the diopter ring 81 and the inner rod 63 of the push rod 27-1. In this embodiment, this is formed by a gear transmission. For this purpose, a first gear 83 is connected to the diopter ring 81, and an actuation of the diopter ring 81 is thereby transmitted to a second gear 84. A so-called sleeve coupling is formed between the second gear 84 and the eyepiece-side end region of the inner rod 63. This means that the second gear 84 engages the end of the inner rod 63 in a form-fitting manner, so that a rotary movement is transmitted to the inner rod 63.According to this exemplary embodiment, the end of the inner rod 63 is formed with a triangular profile. However, the second gear 84 is not rigidly connected to the inner rod 63; rather, the inner rod 63 can move relative to the gear 84 in the direction of the longitudinal axis 15-1. Due to the thread formed between the sliding sleeve 64 and the inner rod 63, rotation of the gear 84 results in an additional axial displacement of the inner rod 63 with the joint head assembly 71 in the direction of the longitudinal axis 15-1. The diopter ring 81 and the gears 83, 84 of the diopter gear 82 are not displaced in the direction of the longitudinal axis 15-1. On the other hand, actuation of the focusing knob 10 and thus an axial displacement of the entire push rod 27-1 has no effect on the adjustment of the diopter ring 81 or the diopter gear 82.

[0083] The embodiments show possible embodiments, whereby it should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather various combinations of the individual embodiments with one another are also possible and this possibility of variation lies within the skill of the person skilled in the art in this technical field due to the teaching of technical action by means of the objective invention.

[0084] All information on value ranges in this description is to be understood as including any and all sub-ranges thereof, e.g. the information 1 to 10 is to be understood as including all sub-ranges starting from the lower limit of 1 and the upper limit of 10, ie all sub-ranges begin with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

[0085] For the sake of clarity, it should finally be pointed out that, in order to better understand the structure, some elements have been shown out of scale and / or enlarged and / or reduced in size. Reference symbol list 1 telescope 31 Lock nut 2 tube 32 inner sleeve 3 Interpupillary distance 33 Adjusting disc (front) 4 Joint axis 34 Adjusting disc (rear) 5 Articulated bridge 35 Driving head 6 Focusing lens 36 compression spring 7 Focusing device 37 axle sleeve 8 Housing 38 slot 9 axis of rotation 39 guide pin 10 Focus knob 40 thread 11 Focusing gear 41 internal thread 12 threaded spindle 42 drive bushing 13 stop 43 Stop element 14 Retaining trough 44 Groove 15 Longitudinal axis 45 Translation 16 46 rotation 17 optical axis 47 Driving arm 18 lens 48 recess 19 eyepiece 49 guideway 20 Prism inversion system 50 slot 21 Distance 51 Window 22 level 52 outside 23 Diopter ring 53 waist 24 optical system 54 diameter 25 field lens 55 diameter 26 lens mount 56 cylinder jacket 27 push rod 57 Tube housing 28 Driver 58 angle 29 Joint axis 59 level 30 axle nut 60 angle 61 Guide tunnel 62 Window 63 inner rod 64 Sliding sleeve 65 sliding bushing 66 level 67 Longitudinal direction 68 angle 69 clear height 70 free diameter 71 Rod end arrangement 72 acetabulum 73 Great 74 roof edge 75 Area 76 joint head base 77 joint head 78 sliding disc 79 compression spring 80 flank 81 Diopter ring 82 Diopter gear 83 gear 84 gear

Claims

1. A binocular (1) having two tubes (2), which are connected to one another by means of a hinged bridge (5) pivotable about a hinge axis (4) for adjusting the interpupillary distance (3), wherein in the two tubes (2), in each case, a beam path is formed by an objective lens (18), an eyepiece (19) and a prism erecting system (20), wherein a first optical axis (17-1) of the objective lens (18) and a second optical axis (17-2) of the eyepiece (19) are offset parallel to each other by a distance (21) so that these axes (17-1, 17-2) do not coincide, characterized in that the first optical axis (17-1) of the objective lens (18) and the second optical axis (17-2) of the eyepiece (19) lie in a common first plane (22) with the hinge axis (4) of the hinged bridge (5), and that an outer side (52) of each tube (2) comprises a waist (53) formed with a circumferential shape deviating from a circular shape in a region of the prism erecting system (20), wherein a section extending on an upper side of the tube (2) is formed as a first retaining recess (14-1) following the waist (53) for a section of a finger and a section extending on a bottom side of the tube (2) is formed as a second retaining recess (14-2) following the waist (53) for a section of a thumb of a user, wherein a cross-section normal to the first plane (22) and to the direction of the optical axis (17) through each one of the tubes (2) in the region of their waists (53) has its widest part in an intersection area of the tube (2) with the first plane (22), and that a tip (73) of a roof edge (74) of the prism erecting system (20) is arranged in the region of the widest part and facing outwards, wherein the shortest distance between the tip (73) of the roof edge (74) and the inner wall of the tube (2) is smaller than the shortest distance between the tip (73) of the roof edge (74) and a surface (75) of the prism erecting system (20) opposite the tip (73) of the roof edge (74).

2. The binocular according to claim 1, characterized in that outer sides (52) of the two tubes (2) each comprise the waist (53) in a section of their longitudinal extent parallel to the optical axis (17), in a region of the prism erecting system (20) in a direction perpendicular with respect to the first plane (22).

3. The binocular according to claim 1 or 2, characterized in that a cross-section normal to the first plane (22) and to the direction of the optical axis (17) through each of the tubes (2) in the region of the waist (53) has its narrowest part in an intersection area of the respective tube (2) with a plane extending normal to the direction of the first optical axis (17-1) of the objective lens (18), wherein a ratio of a diameter (54) of the narrowest part of the tube (2) normal to the first plane (22) to a diameter (55) of the housing in the area of the objective lens (18) has a value which is lower than 0.80, in particular has a value amounting to between 0.60 and 0.80.

4. The binocular according to one of claims 1 to 3, characterized in that an axially displaceable focusing means (6) is arranged in each one of the two tubes (2) and a common focusing device (7) for displacing the focusing means (6) is formed, wherein the focusing device (7) comprises a housing (8) and a focusing knob (10) rotatable about a rotational axis (9) and the rotational axis (9) is arranged coaxially to the hinge axis (4), and wherein the focusing knob (10) is rotationally coupled to a focusing gear (11) and each focusing gear (11) comprises a push rod (27), by means of which each focusing gear (11) is coupled to one of the two focusing means (6), wherein a direction of a longitudinal axis (15) of the push rod (27) encloses an acute angle (58) with a direction of the hinge axis (4).

5. The binocular according to claim 4, characterized in that the hinge axis (4) spans a second plane (59) with the longitudinal axis (15) of the push rod (27), wherein the first plane (22) and the second plane (59) commonly enclose an acute angle (60) with a value between 0° and 30°, in particular between 10° and 30°.

6. The binocular according to claim 4 or 5, characterized in that a direction of the longitudinal axis (15) of the push rod (27) of each tube (2) is aligned skew with respect to a direction of an optical axis (17) of the tube (2).

7. The binocular according to one of the preceding claims, characterized in that each retaining recess (14-1, 14-2) has a concave cross-section transversely to the longitudinal direction (67) of the waist (53).

8. The binocular according to one of the preceding claims, characterized in that a direction of a longitudinal extent (67) of each retaining recess (14-1, 14-2) extends obliquely to a direction of a longitudinal extent of the tube (2).

9. The binocular according to one of the preceding claims, characterized in that each retaining recess (14-1, 14-2) of each tube (2) has a first eyepiece-side end region located closer to the eyepiece (19) and a second objective-side end region located closer to the objective lens (18), wherein the distance between the respective eyepiece-side, first end regions of the retaining recesses (14-1, 14-2) of the two tubes (2) is smaller than the distance between the respective objective-side second end regions of the retaining recesses (14-1, 14-2) of the two tubes (2).

10. The binocular according to one of the preceding claims, characterized in that each tube (2) in the region of its waist (53) has two retaining recesses (14-1, 14-2) which are opposing each other, in particular two retaining recesses (14-1, 14-2) which are arranged on sections of the tube (2) rotated by 180° with respect to one another.

11. The binocular according to one of the preceding claims, characterized in that the retaining recesses (14-1, 14-2) of the two tubes (2) taper towards one another in a V-shape, wherein a retaining recess (14-1, 14-2) of a first one of the two tubes (2) forms a first limb of the "V" and a retaining recess (14-1, 14-2) of a second one of the two tubes (2) forms a second limb of the "V".

12. The binocular according to one of the preceding claims, characterized in that the prism erecting system (20) comprises a Schmidt-Pechan prism system.

13. The binocular according to one of the preceding claims, characterized in that a third plane (66) extending through the first retaining recess (14-1) at the upper side of the tube (2) and through the second retaining recess (14-2) at the bottom side of the tube (2) extends through the prism erecting system (20).