DE202015105698U1 - Adapter for photo taking - Google Patents

Abstract

Adapter for placing (10) on the eyepiece (3) of an optical observation device (1) with adjustable diopter compensation (7), characterized in that a) in the adapter (8) a diopter compensation lens (13, 14) with a b) the adapter (8) is equipped on the output side with a device (11) for attachment to the socket of a camera lens (9) in the sign opposite to the set diopter compensation.

Description

The invention relates to an adapter for photo-taking for placement on the eyepiece of an optical magnification device with diopter compensation device.

Behind the eyepieces of spotting scopes, telescopes, microscopes or measuring instruments, increasingly cameras with interchangeable lenses are switched instead of the human eye.

The lenses of the cameras are optimized for parallel incident beam path, i. for 0 dioptres. Mostly, they can be focused into the near field and often provide an acceptable imaging performance. This means that a short-sighted observer can compensate for his or her eye defect with the lens of the camera and then switch between observation and image acquisition without or with little refocusing.

Since a camera lens but no or only at long focal lengths offers a very small over-stroke beyond infinity, a farsighted observer must always set his observation device only at 0 diopters in order to take pictures with the camera.

The invention therefore an object of the invention to provide a photo adapter, which allows the transition between observation and image acquisition regardless of the focal length of the camera lens in a simple manner.

This object is achieved according to the invention in an adapter for photo recording of the type mentioned by the characterizing features of claim 1. Advantageous embodiments result from the features of the subclaims.

With the adapter according to the invention, it is possible to maintain the focus adjusted by taking into account the individual refractive error on the observation device, by inserting into the adapter a diopter compensation lens with a sign opposite in sign to the set diopter compensation.

Compensation of ametropia can be done on the observation device both by focusing on the lens and by adjusting the eyepiece. The degree of individual vision deficiency in diopter values is known to the observer by the diopter values of his spectacle lenses determined by an optician and can be compensated in the adapter by inserting an inverse-sign compensating lens.

If the diopter value is not known, he can e.g. be measured with a diopter telescope. In any case, the necessary diopter compensation can be set reproducibly by employing an individual diopter compensation lens.

By connecting the adapter with a clamping ring for placement on the eyepiece of the observation device and another clamping ring for attachment to the socket of a camera lens, a simple change between observation and image acquisition without further focusing is possible.

A compensation of the ametropia not precisely adjusted by inserting the diopter compensation lens in individual cases can be fine-focused via an autofocus contained in the camera.

The arrangement of the input and output side arranged attachment devices of the adapter should be chosen with inserted diopter compensation lens so that the exit pupil of the eyepiece of the observation device and the entrance pupil of the camera lens are not too far apart. This is best achieved with small fixed focal lengths of the camera lens and small image capture sensors.

In the drawing, an embodiment of the adapter is shown schematically. Showing:

1 an adapter without diopter compensation lens,

2 an adapter with negative diopter compensation lens and

3 an adapter with positive diopter compensation lens.

1 shows an adapter in conjunction with a telescope 1 , The telescope 1 contains a telescope lens 2 and a telescope eyepiece 3 ,

Without ametropia of an observer is the telescope 1 adjusted so that when taking pictures with a camera 4 one in the picture plane 5 shown image from the telescope eyepiece 3 emerging rays for a pixel run parallel to each other.

An adjustable negative lens 6 symbolizes the adjustment of the imaging means of the telescope necessary for diopter compensation in the event of defective vision of the observer 1 , In 1 is she in a middle position of a scale 7 , ie represented without compensation of ametropia.

The photographic image is taken via an adapter 8th , the input side by means of a clamping ring 10 on the telescope eyepiece 3 is attached and on the output side, a device 11 for attaching to a camera lens 9 is available.

In the adapter 8th is an empty mission here 12 available for receiving a replaceable diopter compensation lens. The use 12 In particular, it can be part of a bayonet.

In 2 is by moving the negative lens 6 the compensation of a defective vision in a short-sighted observer. The from the telescope eyepiece 3 emerging rays of a pixel are slightly convergent, giving a compensation lens 13 Negative power to restore a parallel beam in the insert 12 is inserted.

3 shows the compensation of farsighted eyesight by a corresponding compensation lens 14 positive refractive power.

LIST OF REFERENCE NUMBERS

1

 telescope

2

 Telescope Lens

3

 Telescopic eyepiece

4

 camera

5

 image plane

6

 Negative lens

7

 scale

8th

 adapter

9

 Camera Lens

10

 clamping ring

11

 Device for application

12

 commitment

13

 Compensation lens negative

14

 Compensation lens positive

Claims (3)

Adapter for mounting ( 10 ) on the eyepiece ( 3 ) of an optical observation device ( 1 ) with adjustable diopter compensation ( 7 ), characterized in that a) in the adapter ( 8th ) a diopter compensation lens ( 13 . 14 ) is inserted with a sign opposite in sign to the set diopter compensation and b) the adapter ( 8th ) on the output side with a device ( 11 ) for attaching to the socket of a camera lens ( 9 ) Is provided. Adapter according to claim 1, characterized in that the diopter compensation lens ( 13 . 14 ) interchangeable ( 12 ) in the adapter ( 8th ) is used. Adapter according to claim 2, characterized in that the socket of the diopter compensation lens ( 13 . 14 ) is fitted with a bayonet that fits into the adapter ( 8th ) is einriegelbar.

Images