DE3016209A1 - Focussing optics for telephoto camera - has separate telescope on adjustable mountings beside main optics - Google Patents

Abstract

The telephoto lens on a compact cine camera has focussing optics with a separate telescope (8) mounted beside the main optics (1) and adjusted to the same field centre of view as the main optics. It enables a hand held camera to be rapidly focussed and used. The separate telescope is mounted on clamp rings (2) fitted around the main optics and linked to the rings by adjustable struts (6). The eyepiece of the telescope is set in the same plane as that for the telephoto lens, and can be spaced so that the user can see with either eye, and can look through either simply by concentrating on either eye.

Description

The invention relates to a device for rapid location determination of a film object in the Super 8 and 16 mm telephoto range.

The purpose of the invention is to quickly determine the location of the film object. As a result, the focus of the image through the eyepiece of the film camera can be very much adjust quickly.

35mm telephoto lenses on Super 8 system and 16 mm film cameras mainly used for animal photography. It always comes down to a quick one Image focus on. The shooting angle for telephoto focal lengths from approx. 200 mm is very small and the depth of field is also very shallow. This is the location and then the image focusingf if only through the eyepiece the film camera is to be adjusted, difficult and very time consuming. Some recording objects are then no longer at the place.

With the present invention, the location of the film object is determined and image focusing is much faster and easier. Another Another advantage is that panning along with the film object is easier. the The device can be attached to the left or right of the 35mm telephoto lens will. Any 35mm telephoto lens can be used with appropriate brackets will.

The invention helps the filmmaker when using 35mm telephoto lenses on Super 8 system and 16 mm film cameras, object search and image focusing to be carried out quickly and easily.

This makes it possible to take pictures of animals, because it is mostly seconds matter.

The object of the invention is to d-aß the image focusing-and the movie object search can be done quickly. This task is carried out by the In the invention reproduced in the claims solved.

An embodiment is shown in the drawing and will Described in more detail below: On the 35mm telephoto lens (1) are suitable Place two retaining rings (2a and 2b) attached.

The retaining rings (2a and 2b) can optionally be connected to the to the left or right of the lens (1). This is necessary because of the Filmer with the left or right eye through the eyepiece (3) of the film camera (13) sees. The retaining rings (2a and 2b) are after the first adjustment of the entire Device on the lens (1) tightly adjusted by clamping screws (14). The retaining rings (2a and 2b) thus always remain attached to the lens (1). To the retaining rings (2a and 2b) the two setting brackets (4a and 4b) are then easily adjusted by means of one each rotatable Knurled screw 5a and Sb) screwed on. The adjustment holder (4a and 4b) are each provided with a threaded piece (6a and 6b) on the threaded pieces (6a and 6b) is a commercially available telescopic sight via the brackets (7a and 7b) (8) attached. The threaded pieces (6a and 6b) are now set so that the The telescopic sight (8) is firstly parallel to the objective (1) and secondly the center-to-center distance (a) of the eyepiece (3) and the telescopic sight (8) the interpupillary distance of the filmmaker and thirdly, the eyepiece (3) and telescopic sight outlet (11) must be parallel Fine adjustment can still be made using the two adjusting screws (9) on the telescopic sight (8) The telescopic sight (8) has a so-called target sting provided, you can now see with one eye through the eyepiece (3) and at the same time with the other eye through the telescopic sight (8) 9 so the film object, which in the Target spike area can also be seen in the center of the eyepiece.

Only then is the basic setting correct.

This basic setting is described only once for each lens type performed.

When removing, only the knurled screws (5a and 5b) are loosened; this does not affect the adjustment. The telescopic sight (8) must have a be provided certain extension piece (10) and an eyecup (12) because only this enables clear vision through the telescopic sight (8).

The device according to the invention is not based on the example shown limited, the retaining rings (2a and 2b), adjusting brackets (4a and 4b) threaded pieces (6a and 6b) have any other possible shape and thus an optimal adjustment and mount to the lens (1).

Claims (1)

Device for quick location of a pilm object in the Super-8 and 16mm telephoto range. Protection claims: 1) Device for quick location of a Film object in the Super-8 and 16mm telephoto range, which is not h n e t that on a known telephoto lens (1) a telescopic sight (8) by means of retaining rings (2a and 2b), setting brackets (4a and 4b), knurled screws (5a and 5b) threaded pieces (6a and 6b) can be changed in the axial direction of the telephoto lens (1) and in the distance (a) adjustable ist0 2) Device according to claim 1, d u r c h g e k e n n z e i c h n e t that the holder (2a and 2b) is firmly connected to the telephoto lens (1) ist0 3) Device according to claims 1 and 2 since you r c h g e k e n n n z e i c h n e t that the adjustment of the telescopic sight (8) to the telephoto lens (1) via the Threaded pieces (6a and 6b) took place