DE1083647B - Device on a photographic apparatus for joint aperture and distance setting - Google Patents

Description

GERMAN

In order to take photographs with artificial light sources that are permanently connected to the camera there is a constant exposure of the recording material, especially with flash photography to achieve, must be known between the object distance, the aperture and the other Parameters the relationship

L = B-E

where B is the aperture value that can be read on the camera, E is the distance between the camera and the object and L is a quantity called the guide number, which includes the strength of the light source and, if applicable, the duration of the light flash, the sensitivity of the recording material and, if applicable, the exposure time .

Attempts have been made to control the operation and handling of the camera for such recordings by coupling the two setting parameters (distance and aperture) to simplify and facilitate, in such a way, that in the coupled state when setting one size, the other is inevitably set so that the mentioned conductance condition for constant exposure of the recording material remains fulfilled. the practical implementation of such a device results in complicated and expensive coupling mechanisms led, which nonetheless do not satisfy.

For example, a device on a photographic apparatus has become known in which the distance setting ring with a conventional, non-logarithmic distance scale and the aperture setting element arranged concentrically with this via cable pulls with linear movable, parallel bolts are in connection. These bolts are in turn shifted within their straight line by means of a two-armed angle lever and act in the process on the said cable pulls in such a way on the distance or aperture setting element that the mentioned conductance relationship should be fulfilled. However, since the positions of the bolts in their straight guides If no logarithmic scale corresponds, the guide number condition can only apply to one, if at all The value of the guide number must be met.

Furthermore, a photographic adjustment device has become known in which the distance or the diaphragm setting ring arranged concentrically with it, each via a cam gear disk each with a further cam gear disk connected, which are on a common, on the housing mounted shaft are arranged eccentrically and each with one concentric to each other circular shard arranged on the same shaft is firmly connected; the two circular disks can Establishment at a photographic

Apparatus for common aperture

and distance adjustment

Applicant:

STUDIO Society for Industrial

and fashion photography,

Vaduz (Liechtenstein)

Representative: Dipl.-Ing. C. Wallach, patent attorney,
Munich 2, Kaufingerstr. 8th

are coupled to one another in a rotationally fixed manner in different positions relative to one another. The curve shape the cam gear disk is chosen so that there is a logarithmic motion for the circular disks Regularity results. The different relative positions in which the two circular disks can be coupled to each other, correspond to different guide numbers on a guide number setting device can be selected and read on a guide number scale.

With this known adjustment device there is a coupling of the distance adjustment and the aperture adjustment possible with simultaneous fulfillment of the guide number condition for different guide numbers. However, the known device has several serious disadvantages. With the coupling device between the setting elements (distance setting ring and aperture setting ring) must next to the coupling of the two organs at the same time such a transformation of the movement of the adjusting elements be accomplished that on the directly coupled parts (concentric circular disks) the Coupling device gives a logarithmic dependence. Have the scales on the setting elements conventional course, in particular the distance setting member has a conventional distance scale, in which the range of medium and long distances are excessively crowded together is, so that the for the mentioned areas of application (recordings with the camera

009 530/183

attached artificial light source, especially flash photos) can not achieve required high Einstallgenauigkeit. In addition, the coupling device overly complicated and requires extremely high precision without being affected basically the mentioned disadvantage of low setting accuracy due to the conventionally divided scales could be eliminated.

The high setting accuracy of + ¹ f-stop, which is particularly necessary for color photographs, cannot be achieved with the known setting device either, at least not in the area of the small aperture openings (11-16-22-32-64), where the gaps on the setting ring are known to be only 1 or 2 mm. As a result of the complexity of the clutch transmission with the inevitable play between the teeth of the various gear disks, such a setting accuracy cannot be achieved.

Furthermore, the coupling device itself is not arranged on the lens, but on the camera housing, so that the lens is not easily interchangeable.

Finally, because of the small size of the circular disks that can be directly coupled to one another, the usable guide number range and the setting accuracy of the guide number are limited.

Another known device for coupling removal and Aperture setting to achieve a uniform lighting with flash photos afflicted, in which the aperture and distance setting members having conventional graduations are coupled via a conversion gear attached to the camera housing, which consists of the lens there is coaxially surrounding ring elements, which engage with corresponding slot curves or in these Spigots are provided to regulate the aperture when the distance setting is changed to change accordingly. An adjustment to different guide numbers is not provided. The same thing applies to a known camera in which the setting rings arranged concentrically around the lens for distance or aperture can be coupled to each other in different positions to help them To be able to rotate flash photos together. However, this camera also has a conventional one Aperture scale and can therefore not be more satisfactory for several selectable guide numbers Work wisely.

The invention relates to a device of this type on a photographic apparatus which is displaced together with an artificial recording light source relative to a subject, whereby the device allows the diaphragm setting and distance setting members to be selected and selected on a guide number setting device with counter-rotating scales in several different guide numbers (L) Relative positions readable on a guide number scale can be coupled to one another in a rotationally fixed manner, so that when the distance setting (E) is changed, the aperture (B) is automatically adjusted so that the guide number condition L = BB is fulfilled for the guide number set in each case and the exposure of the recording material is correspondingly constant is held.

To avoid the disadvantages of known devices of this type outlined above, according to FIG Invention provided that between the rotatable distance setting member and the lens provided means, which upon actuation of the distance control organ cause the focus of the lens are designed so that there is a logarithmic distance scale on the distance setting member results, and that in a manner known per se a logarithmic scale exhibiting, rotatable diaphragm setting element with the distance setting element directly or by a linear one Gear can be coupled.

According to an advantageous embodiment of the invention it is provided that the logarithmic Aperture and logarithmic distance scales have the same base lengths (in degrees of Rotation range).

According to a further advantageous embodiment, with a coaxial arrangement of the diaphragm and Distance setting organs, the coupling of the two setting devices directly at different points the scope of the adjusting devices.

According to a further embodiment, in the case of a non-coaxial arrangement of the two adjusting elements, for example, when arranged on different side walls of the camera, the two setting members by means of a transmission containing only linear links (gears, bevel gears) in a rotationally fixed manner with one another be coupled.

By the measure according to the invention between the distance setting element and the lens provided means which, when the distance setting member is actuated, the focusing of the Effect objective to train so that a logarithmic scale on the distance setting results, which then with the in a known manner logarithmically divided aperture setting member can be coupled directly or by a linear gear, this is the basis of the invention underlying problem: creating a simple, accurate and different for a wide range Guide numbers applicable device for the common setting of distance and aperture, in perfectly resolved. Compared to the known devices, the device according to FIG Invention especially the following advantages: Since each of the two setting members to be coupled has a logarithmic Having a scale, the two setting organs can fulfill a multiplicative relationship between the two setting variables can be coupled directly or via links that only act linearly.

The logarithmic distance scale used here has the further advantage that the area the mean and long distances compared to the conventional, non-logarithmic distance scales is spread and thus enables a more precise distance setting in this area will.

This not only results in precise focusing of the camera; because with such coupled Adjustment devices, the distance adjustment at the same time causes the aperture adjustment, is with a more precise distance setting at the same time a greater accuracy of the aperture setting connected, which is particularly crucial for the high demands of color photography Meaning is.

. In connection with the diaphragm scale, which is also logarithmically divided, is therefore with that according to the invention trained device with the known setting devices not achievable setting accuracy given.

5 6

The adjustment device according to the invention for the guiding slot 37 'of the cam disk, pin 38, tooth common Adjustment of distance and aperture wheels 39 to 41, external toothing of the tube socket can be placed entirely on or in the lens mount so that .this can now be achieved easily in the slot 37 'of the cam Camera housing can be used, whereby they are 5 that the angular positions of the tube socket with the range finder provided there and the corresponding feed positions of the Obun directly clutch. A lens barrel with an adjustment device on the distance adjustment ring 34 is connected Lens provided according to the invention can correspond to arithmic distance scale. The Entdaher Versatile use as an interchangeable lens, for example, the distance scale is not on one the. In the known devices, this possibility is a knurled part 34 'of the circumference of the removability not given. adjusting ring 34 attached and by means of an am

Further advantages and details of the invention The scope of the protruding part 32 ″ of the lens can be seen from the following description of three marks attached to the support ring.
Embodiments on the basis of the drawing. In the objective carried by the tube 33, this is shown 15 which is only indicated by an aperture setting ring 42.

1 shows an axial section through an objective diaphragm which is known per se

version with a device for aperture adjustment is designed so that the aperture values

in the case of a coaxial arrangement of the distance and 2-2.8-4-5.6-8-11-16-22 of the aperture scale

Aperture adjustment members on the same wall as the ring 42, for example by means of a mark

Camera, 20 45 can be read on the lens 44, approximately the same

FIG. 2 shows a section along the line H-II of FIG. 1, corresponding to angular distances of the diaphragm setting ring.

Fig. 3 is a partial section along the line IH-III of the ring 42 is also with a pull-out

Fig. 1, coupling pin 43 provided through which he with

4 and 5 are diagrams for explaining the distance setting ring 34 optionally in processing the device according to Fig. 1 to 3, 25 different angular positions, the various guide

6 shows another embodiment in which the numbers correspond can be coupled. By doing Invention of a camera with a non-coaxial connection ring 34 are corresponding drilling disorder for this purpose the aperture and distance setting means (Fig. 3) provided and with the associated is applied, as it is referred to, for example, in the case of two leading numbers. The blind-eyed person could just as well SLR cameras are the case, the 30 adjusting ring 42 with a corresponding row of holes Camera in one between the two lenses and the distance setting ring 34 with an entlaufenden Plane is cut, be provided speaking coupling device. As

FIGS. 7, 8 and 9 show details of the device according to FIG. 3, is the diaphragm setting ring 42

Fig. 6, for example set for the guide number "12". To

Fig. 10 shows a modification of the device according to 35 pulling out the coupling pin 43, the

Fig. 6, position also optionally for one of the other guide

Fig. 11 and 12 details of the device are made by number values.

Fig. 10. If the control cam 37 'in the manner mentioned

According to Fig. 1 and 2, the lens barrel is designed correctly, so it can be used in conjunction with the

a lens 40 screwed into the camera 31, suitable selection of the transmission ratio of the

support ring 32, in which the lens system ent- gears 39, 40 and 41 achieve that for each

holding lens barrel 33 is longitudinally displaceable. The currently set guide number by turning the ring

Longitudinal displacement of the tube 33 is adjusted by a 34 the distance and at the same time the diaphragm in such a way.

Tube socket 36, which is provided with a pin 36 ', has the above-mentioned relationship

in a helical slot guide of the tube 33 45 L = BE is fulfilled.

intervenes, which in turn in a known manner by The diagram of Fig. 4 illustrates the legs Pin 32 'is secured against rotation. The pin movement ratios of the tube 33, the distance 32 ' The tube setting ring 34 and the diaphragm setting ring 42 pass through a circular arc slot. socket 36 through and engages in a longitudinal slot As can be seen from the diagram, of the tube 33. 50 is set to the guide number »50« in the

The distance setting ring usable distance range of about 2.3 to 10 m 34 is rotatably mounted on the support ring 32, which acts on the tube socket 36 when the distance setting ring 34 is adjusted, the tube 33 via a cam disk 37 and gears 39 to 41 and at the same time the aperture setting ring 42 (Fig. 2). The gear 41 is set with the fact that the specified relationship is satisfied. External toothing of the tube mount 36 (FIG. 2) in the 55 For example, when the ring 34 is engaged at "6 m". When the distance setting is turned, the scale of the ring 42 and the ring 34 are set clockwise on the toothed diaphragm to the value approximately "8.4". The wheel 39 mounted pin 38 in a cam shape of the cam 37 'and the translation diene ends of guide slot 37' of the bar in Fig. 2 ratios of the gears are thus to be selected so indicated dotted, guided so that the tooth 60 that between the path length of the tube 33 and the wheels 39, 40, 41 and the part 36, the arrows indicated in Fig. 2 by angular rotation of the distance setting ring 34 execute. The relationship shown in FIG. 4 is realized, the distance setting ring 34 is coupled to the cam disk 37, which results in a logarithmic distance scale, by a FIG. 5 (indicated by dash-dotted lines in FIG. 2). 65 Distance and aperture setting rings when setting

Between the distance setting ring 34 and the one on the guide number "12". As can be seen, extends

the pin 36 'causing the lens advance is the usable distance range in this case

Tube socket 36 is therefore located as follows from 1 to 6 m.

Transmission mechanism: cam disk 37 (with Fig. 6 to 9 and 10 to 12 show execution

Distance setting ring 34 firmly connected), guide 70 possibilities of the device explained in FIGS. 1 to 5

used in a two-lens reflex camera, in which the distance setting on the one hand and the aperture setting on the other hand not coaxial, but provided on two surfaces of the camera that are at right angles to one another are.

According to Fig. 6, which shows a section through the reflex camera in one between the two end faces Lenses extending plane shows, the lens with the is on the front side of the camera 51 Diaphragm adjustment ring 52 arranged. The distance setting ring is located on a side wall of the camera 54, which via a cam 57 and a gear ratio according to the type of FIG. 2 on a gear 56 acts, which is firmly seated on a hollow shaft 58. Inside the camera there is 58 on this hollow shaft a gear 59 attached, which is on a lens carrier 61 shifting rack 60 acts. The removal locking ring 54 is with the cam 57 rigidly coupled by a screw 55.

The distance adjustment ring · 54 is also about a Axis 62 and bevel gears 63, 64 with an adjustment knob 65 coupled, the ring gear of which engages with the aperture setting ring 52, which is also toothed stands. The bevel gear 63 sits loosely on the hollow shaft 58 and is screwed into the axis 62 by a screw Coupling pin 66 taken along, which is in a circular arc-shaped slot in the hollow shaft 58 can rotate a sufficient angle (Fig. 7). The bevel gear 64 sits on a rotatable mounted shaft journal 67, the one with the also rotatably mounted shaft journal 68 of the aperture setting knob 65 is rotatably coupled so that both parts move against each other in the longitudinal direction can. As shown, a pin inserted in part 68 can be inserted into a longitudinal groove for this purpose of part 67 engage.

The distance setting ring 54 is coupled to the axle 62 via the guide number setting device. These consists of a dial 69, which with the distance setting ring 54 by a pull-out Coupling pin 70 can be coupled to a series of openings in ring 54 (Fig. 8) cooperates, which correspond to the various guide number values. The respective set guide number value can be read in a window 71.

As can be seen, in this embodiment as well, as in the device shown in FIGS. 1 to 3 the aperture and the distance setting ring together coupled in an angular position corresponding to the selected guide number, the movement of the distance setting ring on the longitudinally displaceable lens carrier by means of a control cam and transmission gear is transmitted so that the above-mentioned relationship between conductance, aperture value and. distance is satisfied.

7 shows a section through the bevel gear 63 and the driver pin 66.

Figures 8 and 9 show the end view of the distance setting ring 54 without or with the dial 69.

The embodiment shown in FIGS. 10 to 12 differs from the embodiment in FIG. 6 to 9 in that the guide number setting device is not on the distance setting ring, but on the one with the Aperture adjustment ring coupled aperture adjustment knob is provided.

Accordingly, the cam 57 'of the ring 54' is coupled directly to the axis 62 'by for example, is placed on a square milled at the end of this axis.

In order to be able to set the guide number, the button 80 used for setting the aperture does not sit rigidly the shaft journal 68 ', but it is rotatable by means of the flange plate 68 "of the shaft journal 68' a screw 80 'and fixed by a pull-out pin 82 with the flange plate 68 "in different Angular positions can be coupled non-rotatably. The flange plate 68 ″ is provided with a row for this purpose provided by bores arranged on a circumference (Fig. 12), which correspond to the various guide number values correspond and are denoted by these in the drawing. As can be seen from Fig. 11, the currently set guide number can be changed by a in the Cover 83 provided window on a guide number scale and a mark can be read on the of the lateral surface of the flange plate 68 ″ or on the lateral surface of one firmly connected to the button 80 Disk 81 are attached.

Claims (2)

PATENTED KITCHEN: 1. Device on a photographic apparatus, which is moved together with an artificial recording light source relative to a subject, whereby the device means the diaphragm setting and distance setting member with counter-rotating scales in several different guide numbers (L) corresponding, selectable on a guide number setting device and on a guide number scale readable relative positions are rotatably coupled to each other, such that when the distance setting (E) is changed, the aperture (B) is forcibly adjusted so that the guide number condition L = BB for the guide number set remains fulfilled and the exposure of the recording material is accordingly kept constant, thereby characterized in that the means provided between the rotatable distance setting element and the objective, which, when the distance setting element is actuated, bring about the focusing of the objective, are designed in such a way that at the distance ungseinstellorgan results in a logarithmic distance scale, and that in a known manner having a logarithmic scale, rotatable aperture setting element with the distance setting element can be coupled directly or by a linear gear. 2. Device according to claim 1, characterized in that the logarithmic aperture and the logarithmic distance scale equal base lengths (in degrees of rotation) to have. 3. Device according to claim 2, characterized in that that with a coaxial arrangement of the diaphragm and distance setting members, the coupling of the two adjustment devices directly at different points on the circumference of the adjustment elements he follows. 4. Device according to claim 3, characterized in that the aperture setting ring (42) with the distance setting ring (34) through a pull-out pin that can be inserted into various holes corresponding to the guide number values (43) can be coupled. 5. Device according to one of claims 1 and 2, characterized in that when not coaxial arrangement of the two adjusting elements these by a linear link only (gears u. The like.) containing gears are rotatably coupled to one another. 6. Device according to claim 5, characterized in that that when the two setting members are arranged on different surfaces of the camera, for example a reflex camera, the distance setting ring (54, 54 ') with the diaphragm setting ring (52, 52') via bevel gears (63, 64) is coupled non-rotatably. 7. Device according to one of the preceding claims, characterized in that the distance setting ring on the longitudinally displaceable lens part for distance adjustment with the interposition of a cam (37, 57, 57 '). 8. Device according to one of claims 3, 4 and 7, characterized in that in addition to the Aperture (42) and the distance setting ring (34) also the cam disc firmly connected to this (37) and those controlled by this, acting on the longitudinally displaceable tube (33) Gears (38 to 41) built into the lens mount (32) screwed into the camera are. 9. Device according to claim 5 or 6, characterized in that the distance ring (54, 54 ') via the cam disc (57, 57') acting on a hollow axle (58), the wheel via a rack (59) and a rack ( 60) moves the longitudinally displaceable lens part. 10. Device according to one of claims 5, 6 and 9, characterized in that the distance setting ring (54; FIGS. 6 and 10) acts on the diaphragm setting ring by means of an axis (62, 62 ') running in the hollow axis (58). 11. Device according to one of the preceding Claims, characterized in that one of the two setting members (distance or aperture setting ring) is provided with a guide number scale on which the respective relative position, in which the two setting elements are coupled with each other, corresponding guide number directly is readable. 12. Device according to one of claims 5, 6, 9 or 10, characterized in that the guide number setting device (69, 70, 71) is provided on the distance setting ring (54). 13. Device according to one of claims 5,6,9 or 10, characterized in that the guide number inserting device (80 to 82) is provided on the diaphragm adjustment ring. 14. Device according to one of claims 5, 6 and 9 or 10, characterized in that the Guide number setting device and the guide number scale on the linear averages of the between the aperture and the distance scale provided mechanical transmission device are arranged. Considered publications:
German Patent Nos. 614 425, 616 214, 194;
U.S. Patents Nos. 871654, 1240 073, 543 208, 2 213 749, 2 334 075, 2 341 393, 2 369 199, 2,464,559; Photographic Trade News magazine from June 1953, pp. 10 and 11. For this purpose 2 sheets of drawings © 009 530/183 6.60