DE1869249U - PHOTOGRAPHIC CAMERA WITH ADJUSTABLE DEPTH OF FOCUS INDICATOR. - Google Patents

Description

GFA CAMERA-WERK RA. O 8 O GO 1 * ~ 5.2.63

SHARED COMPANY

^M0NCHEN Munich, August 6, 1957

Here / 6 / Kn

PO 59 / I.IO 85

Photographic camera with adjustable arrangement Depth of field indicator.

The present invention relates to a photographic camera as opposed to the one coupled to the lens diaphragm Distance skaia adjustable depth of field indicator, which has display curves running at an angle to the distance scale. These display curves show the respective on the distance scale Depth of field at.

In the cameras of this type known to date, there is a depth of field indicator Tus a arranged on the lens mount, depending on the aperture adjustment axially movable ring with curved edges that protrude outward on the ring. The ring is located under the support of the distance scale and protrudes with one lying between the two curved edges protruding part according to the respective aperture setting rcehr or less below the support of the distance scale.

Such depth of field indicators are associated with the disadvantage that reading the displayed depth of field is relatively complicated.

ACCORDING of the invention, a photographic camera is now coupled with the lens stop, "has been proposed in relation to the distance scale adjustable depth of focus indicator with obliquely to Entfernun _(sskala extending display curves,

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"'AKTIENGESELLSCHAFT -' Ll

MUNICH _ 2 - '/

if PO 59 / MO 85

which jump back inwards on the depth of field indicator.

In particular, it is proposed to use the depth of field indicator to be arranged in such a way that it can be moved with its display curves over the distance scale.

In a preferred embodiment of the invention, a display panel is arranged parallel to the distance scale, via which the The display curves of the depth of field indicator can be moved in such a way that the area of the display field lying between the display curves indicates the respective depth of field. More advantageous-. this display field has a color which contrasts with the neighboring parts of the camera.

The display curves of the depth of field indicator are preferably formed by edges of the curve support, so that the Parts of the display field lying outside the display curves are covered by the depth of field indicator. Likewise are marks of the distance scale, which are outside the range the respective depth of field, through the depth of field indicator partially covered.

According to a further feature of the invention, the depth of field indicator can be designed in a ring shape and arranged around the ring-shaped support of the distance scale of the objective. The depth of field indicator can be connected to the axially adjustable distance scale in such a way that it takes part in its axial movement. ' ■

According to a further feature of the invention, the depth of field is "- ■ Indicator on a link of the device for distance graduation .._

AGFA CAMERA-WERK _ 3 _ / ~ »

- AKTIENGESELLSCHAFT '- s

MUNICH . \ J

PO 59 / MO 85

of the lens. Also the depth of field indicator controlling organ can be connected to a link of the device for distance adjustment of the lens. The proposed depth of field indicator can not only kaireraf-proof parts, but also one on the camera interchangeable arranged lens mount be stored ^. - - · - · -

Further features of the subject of the invention go from the following description of an embodiment of the invention emerged. As can be seen from this description, the. Subject of the invention with the advantage of being very light and reliable recognizability of the depth of field display and with the advantage of an extremely simple, space-saving and universal usable construction connected.

The above embodiment of the invention is in the drawings Shown in more detail, namely shows: 'Fig. 1 is an interchangeable lens mount for a photographic Camera with the depth of field indicator according to the invention

partly in the Aufeicht, partly in the cut, Pig. 2 parts of the object of FIG. 1 in plan view, Fig. 3 parts of the object of Fig. 1 in perspective Depiction.

The fit of the interchangeable lens has a coupling ring 1, with which it can be attached to a photographic camera (not shown) and can be locked with the camera in a bayonet-like manner. The optical members 2, 3, 4 of the lens are in a known manner arranged within a common carrier 5, which with -einem

AGFA CAMERA PLANT

AKTIENGESELLSCHAFT - '4 -

MONKS

PO 59 / L'O 85

Guide thread part 6 is rigidly connected. The internal thread of the guide part 6 engages in a corresponding external thread 7 ' the threaded sleeve 7, which is only partially shown in Fig. 3 .; There are the individual parts of the lens mount for reasons the clarity at a greater distance from each other and partially shown in the cut open state.

The threaded sleeve 7 is by means of an internal thread 7 ″ on a The tube 8 is rotatably mounted and is firmly connected to the coupling ring 1 via the intermediate piece 9. On the threaded sleeve 7, which has a further external thread 7 "'is the distance setting ring 10 screwed on. Through one in the threaded sleeve 7 and the distance setting ring. 10 in the axial direction inserted pin 11, the parts 7, 10 are secured against rotation relative to one another. The threaded sleeve 7 and the distance setting ring 10 thus form a double tube with a U-shaped cross-section, in the space of which the threaded guide part 6 of the Lens carrier 5 engages.

By turning the distance setting ring 10, the your tube 8 rotatably mounted threaded sleeve 7 rotates, eo that the threaded guide part 6 of the lens carrier 5 and thus also the lens carrier 5 with all members 2, 3, 4 of the lens can be adjusted in the axial direction. The lens carrier 5 engages with a projection, not shown, into a groove of the, also not shown, running parallel to the lens axis Tube 8 and is therefore secured against rotation.

AGFA CAMERA PLANT

STOCK COMPANY
MONKS

PO 59 / MO 85 -

The distance setting ring 10 has a knurled button 12 for easy operation. The object distance. Distance scale 13, indicating in meters, is arranged on a scale tape 14, v; elches in a limited by the edges 15, 16 · Annular groove of the distance setting ring 10 is inserted. For reading the mark 17 arranged on an immovable part of the lens mount serves for the distance set in each case. On the Llittelstück 10 'of the distance setting ring 10 is a Grooved sleeve 18 loosely rotatably mounted, which rests against the edge 16 and against the step 20 of the distance setting ring 10. The grooved sleeve

18 has three curved grooves.

The cam ring 21 of the depth of field display device is mounted on the grooved sleeve 18. This engages with its radially inwardly directed projections 2 2 in the grooves 19 of the grooved sleeve 18 and with its outwardly bent tab 23 in a groove 24 of a knurled ring-shaped handle piece 25, which runs parallel to the lens axis and which is also connected to the coupling ring 1 via an intermediate piece 26 is firmly connected and is used to easily grasp the lens while changing the lens. The cam ring 21 partially covers the distance scale 13 of the distance setting

inward running
ring 10 and has two curved edges 27 »28, which interact with the distance scale 13 in a manner to be explained in more detail.

The aperture setting is used to adjust the lens aperture 29 30, in which a coupling ring 31 is crimped. This is made wave-shaped by a support on the handle piece 25 bent spring ring 32 pressed against a retaining ring 33, which means

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AGFA CAMERA PLANT

SHARED COMPANY

MONKS - 6 -

PO 59 / MO 85

Screws 34 is screwed onto the intermediate piece 26.

The coupling ring 31 has a tab 35 which is positioned between the radially outwardly directed prongs 36, 37 of the diaphragm transmission ring 38 protrudes. This is loosely rotatably mounted on the rear edge piece 10 ″ of the distance setting ring 10 and engages with the bead 38 'under the ring 18 "of the grooved sleeve 18. The aperture transfer ring 38 has slots 39 through which inwardly directed tabs 41 one of the transmission ring 38 surrounding snap ring 40 reach through. The tabs 41 engage in an annular groove 42 of the distance setting ring 10, so that the aperture transmission ring 38 is secured against axial displacement with respect to the distance setting ring 10. The flange 43 of the snap ring 40 rests on the ring 18 'of the grooved sleeve 18, so that this also prevents axial adjustment in relation to the ent-' Fernungseinstellring 10 is secured.

The diaphragm transfer ring 38 is connected to the objective diaphragm 29 . "is coupled via a port set 44 which extends through the intermediate piece 9 and whose driver fork 45 is in engagement with the adjusting bolt 46 of the iris diaphragm 29. The adjusting bolt 46 is connected in a known manner to the lamellar drive ring of the iris diaphragm 29.

Furthermore, the diaphragm transmission ring 38 is provided with the grooved sleeve 18 coupled. For this purpose, the aperture transmission ring 38 is outside the fork prongs 36, 37 a further, radially outwardly directed, Extension 47 arranged. The forks 36, 37 and the extension 47 ";

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PO 59 / iiO 85

engage in a recess 48 of the grooved sleeve 18 and rest against the lateral boundaries of the recess 48. ■

When attaching the lens shown in the figures to the camera, the diaphragm part ring 30 is coupled with 4em exposure time setting ring, not shown, on the camera side. For this purpose, the coupling lug 49 projecting axially on the diaphragm coupling ring 31, which protrudes into a recess 50 of the diaphragm setting ring 30 and engages in a recess of the exposure time setting ring. By axially moving the diaphragm setting ring 30 against the action of the spring ring 32, the coupling lug 49 can be disengaged from the exposure time setting ring and then the light value setting can be changed 31, which are passed through recesses in the ring 30.

The mode of operation of the proposed depth of field display device is the following.

When turning the diaphragm setting ring 30 is about the 'coupling ring 31 and the transmission ring 38 twisted the grooved sleeve 18 ,, so dsss the one secured against rotation by the ITut sleeve 18 controlled cam ring 21 is adjusted axially. With an enlargement

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. .'CAMERA PLANT

- Aktiengesellschaft

MÖNCHEN _ 8 - / «- ■"

'in,

PO 59 / MO 85

the diaphragm opening, the cam ring 21 is displaced forwards, while it is moved backwards when the diaphragm opening is reduced is moved. Here, in one case, the curved edges 27, 28 of the cam ring 21 step more or less far below the handle piece 25 out and push yourself over? ' the distance scale 13, while in the other case it is partially under this handle; disappear and partially reveal the distance scale 13. The points of intersection of these two edges 27, 28 with the edge 16 of the distance setting ring 10, in conjunction with the adjacent distance scale 13, indicate the respective depth of field. ■ To make the depth of field clearly visible, the periphery of the edge 16 of the distance setting ring 1.0 has a contrasting with the color of the rest of the lens mount Paint in front so that the length of the between the edges 27, 28 looks- clear, as colored stripes contrasting section of the edge 16 * on the adjacent distance scale 13 the respective sharpness - · deeply recognizes.

Those scale marks the distance scale 13_ ^ which lie apsserhalb the respective depth of field, are covered by the Kuryenring 21 in large part, so that the respective ■ · ^s.. "Distance range in which a sharp image of the receiving -... object is achieved essentially only includes those marks of the scale 13 which are completely visible.

When turning the 2ntfernungseinstellringes 10 these and with it the distance scale 13 is slightly adjusted in the axial direction.

AGFA CAMERA PLANT

SHARED COMPANY

mönchen But the curves also take part in this axial movement

ring 21 partially so that the 'depth of field indicator' is not affected by this.

PO 59 / MO 35

The edges 27, 28 of the cam ring 21 can instead be continuous

i n your '/ projection
curved curves / also straight or step-shaped. Likewise, instead of the curve ring 21 shown in the figures with curved edges 27, 28, a transparent ring of constant width can also be used, which curves corresponding to the edges 27, 28 or in steps.

has running lines.

The display curves 27, 28 can instead of the axially displaceable Ring 21 can also be arranged on a ring piece that extends around perpendicular or obliquely to the objective axis, for example axes arranged on tube 8 can be tilted. A certain game In this case, however, it is necessary between this ring piece and the adjacent fitting parts. . . '. ■

The cam ring 21 can instead of indirectly via the grooved sleeve 18, which controls the ring 21, also directly on the distance »■ -" adjusting ring 10 be mounted. The ring 21 can be "also on the". Support of the distance scale 13 be stored if this scale carrier and the distance setting member of the lens are separated from each other. Even if the cam ring is designed differently its storage on the distance setting ring or on the support of the distance scale is advantageous.

The diaphragm setting ring 30 can also be arranged on the camera itself instead of on the interchangeable lens and with the iris diaphragm 29 of the interchangeable lens be releasably coupled.

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AGFA CAMERA PLANT - 10 -

AKTIENGESELLSCHAFT MÖNCHEN

• / IV

PO 59 / I.IO 85 '.

In addition, the use of the suggested depth of field viewing device not limited to cameras with interchangeable lenses.

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Claims (12)

Claims 1.) photographic camera with a lens hood coupled Depth of field display adjustable to the distance scale ^ which has display curves running obliquely to the distance scale, characterized by that the display curves (27 »28) on the depth of field indicator · (21) run inwards. 2.) Photographic camera according to claim 1, characterized in that that the display curves (27, 28) of the depth of field indicator (21) can be moved over the distance scale (13). 3.) Photographic camera according to one of the preceding claims, ■ "". characterized by a parallel to the distance scale Display field (16) via which the curves (27, 28) of the depth of field indicator (21) can be moved, such that the area of the display field (16) lying between the curves (27, 28) of the depth of field indicator ^ (21) the respective ■ Indicating depth of field. ■ / 4.) photographic camera according to claim 3, characterized in that; the.; the display field (16) one in relation to the neighboring ■ · ^: Has parts of the camera contrasting color. going claims 5.) Photographic camera according to one of the precedingfV, characterized in that the display curves (27, 28) dtaacxSodrafcic & aaia: ki ^^ mm ^ 9a £ ssossix ^ kk by edges of the sharpness entief enanzeigere (21 are formed. '"" ""' -. ' -12- • / agfa'camera factory SHARES COMMUNITY - ■ - 12 - MONKS PO 59 / KO 85 - -V /. ■■ -. ■ 6.) Photographic camera according to claim 3 and 5, characterized in that that the outside of the curves (27, 28) lying parts of the display field (16) through the depth of field indicator (21) are covered. . ■ "- .. ' 7 ») Photographic camera after at least one Claims, characterized in that marks of the distance scale (13) which are outside the range of each wavy depth of field, through the depth of field indicator (21) are partially covered. 8.) Photographic camera according to one of the preceding claims, characterized in that the depth of field indicator (21). ring shaped and arranged around the ring-shaped support of the distance scale (13) of the lens. 9.) Photographic camera according to one of the preceding claims, characterized in that the depth of field indicator (21) with the axially adjustable support of the distance scale (13) is connected in such a way that the depth of field indicator (21). participates in the axial movement of the distance scale (13). · 10.) Photographic camera with a depth of field indicator which is coupled to the lens diaphragm and which is adjustable to the distance scale and which runs at an angle to the distance scale Has display curves, in particular -according to one of the preceding Claims, characterized in that the depth of field indicator (21) on a member of the device (10). · ... ":." --.- ■ to adjust the distance of the lens. . ;, -13- AGFA CAMERA-WERK AKTIENGESELLSCHAFT - MUNICH _ λ -ζ _ PO 59 / MO 85 -ί 11.) Photographic camera according to one of the preceding claims, '. characterized in that the depth of field indicator. (21) controlling organ (18) on a link of the device (10) to adjust the distance of the lens is stored ·. , 12.) Photographic camera according to one of the preceding claims, ■ characterized in that the depth of field indicator
(21) on a replaceable on the camera. . '
Lens mount is stored. / · For this purpose 2 sheets of drawings