DE202012012446U1 - Accessory adapter with adapter ring holder for the lens of an image capture device - Google Patents

Abstract

Accessory adapter with adapter ring holder for the lens of an image pickup device such as a film, video or photo camera, characterized in that it has two lateral holders 02 with guide rails, as well as two connecting struts 03, front, arranged in the direction of the receiving object.

Description

The invention relates to a Linsenvorsatzeinrichtung consisting of an accessory holder with coupling to the lens of an image pickup device such as a film, video, camera or other motion picture camera.

It is known that in the case of film and photographic recordings, such lens attaching devices are generally used to provide the optical and mechanical elements required for the desired image effect, such as color filters, polarizing glasses, graduated filters, gray filters, masks and other effect attachments, rigidly, displaceably or rotatable in front of the lens aperture and to arrange in the optical axis of the taking lens of the camera, as well as to connect the entire arrangement with the lens.

However, the usual ancillary equipment are only partially suitable for use with the new digital film cameras, as they are much lighter and smaller, and can work with lenses shorter focal length than conventional moving picture cameras.

Accessory attachments, according to the prior art, usually consist of a device consisting of a plastic injection molded part with a slot for receiving adapter rings for coupling to the camera lens as well as a plurality of rigidly connected, in front of which are arranged insertion slots for filters and other optical and mechanical elements, see, for. B. European patent EP 0036818 B1 from 20.03.1981. This construction method has the decisive disadvantage that lenses with a short focal length of less than 35 mm, usually no longer can be used, since even the front-mounted slots would lead to vignetting and thus to edge light drop in the figure.

It is known that there are as a remedy own wide-angle variants with only one or two free slots, instead of the usual four. Furthermore, a stackable device is known, in which one can reduce or extend the number of slots by screwing on and off of guide segments and spacers on both sides of the holder.

Disadvantages here are, on the one hand, the multiple tooling costs for the injection molded part, the assortment compulsion of the manufacturer, and, because of the variants, increased storage costs in the distribution, and on the other hand, the re-assembly by screwing together up to a dozen bars, spacers, nuts and screws in each Change from standard to wide angle lenses. During ongoing professional film or photo productions, this is hardly feasible or appropriate.

Here, the invention remedy by the base of the accessory header was moved all the way forward towards the subject and the device can be used to couple the camera lens in each of the slots, the free space between the guide webs allows the immersion of the lens.

Thus, it is possible to couple the lens with a viewing angle of almost 180 degrees in the front slot, so as to allow the use of extremely short focal lengths, or further upstream by one or more filter elements, the actual achievable imaging angle in this case only by the Type and number of front of the lens arranged filter and coupling elements is limited.

The invention is further characterized in that the device for coupling the camera lens with interchangeable threaded rings for all standard lenses with a filter thread diameter of 48 mm to 82 mm can be fitted and that the guide rails of intent the use of up to four filters with 1, 8 mm to 4 mm glass thickness in the standardized 4 inch format, as well as the use of smaller, cheaper filters in the standard format P 84 × 84 mm.

The subject invention of the presented innovation is not limited to the embodiments shown here and results not only from the individually enumerated protection claims, but also from the combination of these with each other and the many conceivable variants. All embodiments and their variants shown here in the description and the illustrations are, insofar as they are to be regarded as new with respect to the prior art, also claimed as essential to the invention.

The invention will be illustrated, described and explained with reference to an embodiment in the figures.

Here are the figures in detail:

1 Front and rear view of the accessory attachment with the lens coupling insert

2 perspective view of the accessory attachment

3 Exploded view of the accessory attachment

4 Views and details of the lens coupling insert

5 Exploded view of the lens coupling insert

1 shows the attachment attachment 01 with the lens coupling insert 04 , the lateral holders with guide rails 02 , a threaded ring for coupling via the filter thread of the lens from the front A, here the lens is connected and from behind B, from the view of the object to be photographed.

2 shows a perspective view of the accessory attachment with the accessory holder 02 , with the lens coupling insert 04 , the lateral holders with guide rails 02 , the two attachable bearing rollers for rotatable filter cartridges 08 , as well as the front 11 and rear fixture 12 for filter cartridges in P format.

3 shows an exploded view of the accessory header consisting of the connecting struts 03 for the lateral holders 02 , the lens coupling insert 04 with the Rastnuten 09 , the two attachable bearing rollers for rotatable filter cartridges 06 , one of the two zusteckbaren bearing rollers 08 for rotatable filter cartridges, as well as the mounting holes 07 for the retaining bolts 08 ,

In 4 A view A shows the lens coupling insert 04 with closed retaining wings 12 for the mounted threaded ring 05 for coupling via the filter thread of the lens and in view B with holding wings open 12 and the detached threaded ring 05 ,

5 is an exploded view of the lens coupling insert 04 with the retaining wings 12 , the rear circuit board 11 as a support for the threaded ring 05 ,

List of reference signs in ascending order:

LIST OF REFERENCE NUMBERS

01

Accessory attachment

02

lateral holder with guide rails

03

Connecting struts for the holders

04

Lens coupling insert

05

Threaded ring for coupling over the filter thread of the lens

06

Bearing roller for rotatable filter cartridges

07

Mounting hole for retaining bolts

08

Holding bolts for the lens coupling insert and the filter insert in P-format

09

Locking groove in the lens coupling insert

10

Insert slot of the front holding device for the filter insert in P-format

11

Front retaining wings for filter insert in P format

12

movable retaining wings for filter insert in P format

13

Stop for travel limitation of the wings on the filter insert

14

Guide groove in the wing on the filter insert

15

End stop for the wings on the filter insert

16

Hinge points for the wings on the filter element

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0036818 B1 [0004]

Claims (8)

Accessory adapter with adapter ring holder for the lens of an image pickup device such as a film, video or photo camera, characterized in that it has two lateral holders 02 with guide rails, as well as two connecting struts 03 , front, arranged in the direction of the recording object. Accessory attachment according to claim 1, characterized in that it is provided with a lens coupling insert 04 is equipped, which can be used in each of, here for example five, guide rails. Accessory attachment according to one of the preceding claims, characterized in that it has lateral locking devices 11 and 12 for fixing of inserts such as reducing adapter, holding devices, etc., has. Accessory attachment according to one of the preceding claims, characterized in that in the lateral holders 02 each a replaceable retaining bolt can be used to engage inserts. Accessory attachment according to one of the preceding claims, characterized in that the lens coupling device for receiving threaded rings in sandwich construction, consisting of the holding plate 04 , a support board 11 for the threaded rings 05 , as well as two movably mounted holding wings 12 is constructed. Accessory attachment according to one of the preceding claims, characterized in that the two movably mounted retaining wings 12 the lens coupling device 04 at a pivot point 16 stored and over stops 13 and leadership 14 be guided and limited in their opening way. Accessory attachment according to one of the preceding claims, characterized in that the two movably mounted retaining wings 12 the lens coupling device 04 when inserting into any position of the guide rails of the two holders 02 , automatically around the inserted threaded ring 05 close, hold this securely and still allow a turn on a coupled lens. Accessory attachment according to one of the preceding claims, characterized in that it also allows the use of smaller, cheaper filters in the P-format 84 × 84 mm via a adapter insert in the form of a standardized P-holder.

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