Camera fitting

• US 4,030,113 A
• Filed: 09/19/1975
• Issued: 06/14/1977
• Est. Priority Date: 09/19/1975
• Status: Expired due to Term

• Current Assignee: Christo Obreschkow
• Original Assignee: Christo Obreschkow
• Inventors: Obreschkow, Christo
• Primary Examiner(s): Griffin, Donald A.
• Application Number:
  US05/614,945
• Time in Patent Office: 634 Days
• Field of Search: 354/286, 354/272, 354/232, 354/202, 354/62, 354/63, 354/268, 354/145, 354/126, 354/270, 350/252, 350/255, 350/183
• US Class Current: 396/533
• CPC Class Codes: G03B 17/12 with means for supporting objectives, supplementary lenses, filters, masks, or turrets

Abstract

A camera fitting adapted to be interposed between the master lens and the body of a camera. The fitting permits the formation of close-up images. The fitting comprises a lens system mounted in a lens carrier. The lens carrier can reciprocate in a sleeve and there is means to determine the direction and extent of the reciprocation, and thus of the size of the image produced. At a first end of the fitting there is means to permit mounting of the fitting in place of the master lens of the camera. At a second end of the fitting there is means to permit mounting of said master lens in the fitting.

Claims

1. A lens containing converter adapted to be removably interposed between the standard master lens and the body of a single lens reflex camera to permit the formation of close-up images comprising;

a lens system mounted in a lens carrier;

a sleeve in which the lens carrier can reciprocate;

means to determine the direction and extent of the reciprocation of the lens carrier within the sleeve and thus of the size of the image produced;

means at a first end of the lens containing convertor to permit mounting of the lens containing convertor in place of the standard master lens of the camera; and

means at a second end of the lens containing convertor to permit mounting of said standard master lens on the lens containing convertor.

2. A lens containing convertor as claimed in claim 1 in which the lens system is a combination of lenses able to produce a magnification of 1:

8.5 (M .114) to 1;

375 X (M 1.375).

3. A lens containing converter as claimed in claim 2 in which the lens system contains four lenses and is the lens system available from a 2X teleconvertor.

4. A lens containing convertor as claimed in claim 1 in which the lens carrier is provided with an outwardly extending peg that engages in a slot formed in a first sleeve and in which the lens converter is provided with an external sleeve that engages with that part of the peg extending through the slot of the first sleeve, the external sleeve being formed with a helical groove that engages the peg whereby rotation of the second sleeve causes longitudinal reciprocation of the lens

5. A lens containing converter as claimed in claim 1 in which the means at the first end of the lens containing converter to permit mounting of the lens containing converter in place of the master lens of the camera is an externally threaded collar adapted to engage in the thread in the front of the camera body which normally receives the master lens.

6. A lens containing converter as claimd in claim 5 in which the means at the second end of the lens containing converter to permit mounting of said master lens on the lens containing converter is an internally threaded collar able to receive the thread of the master lens of the camera.

7. A lens containing convertor as claimed in claim 1 including a bracket to receive a flash unit.

8. A lens containing convertor as claimed in claim 7 in which the bracket can rotate around the fitting.

9. A lens containing convertor as claimed in claim 1 including means to couple with the existing diaphragm mechanism in the master lens and with the existing diaphragm actuating mechanism in the camera whereby movement of the actuating mechanism in the camera body causes actuation of the diaphragm mechanism in the master lens as though the lens converter were not present.