FR2550351B1 - FRESNEL FOCUSING DISC FOR MIRRORED SLR CAMERAS - Google Patents

FRESNEL FOCUSING DISC FOR MIRRORED SLR CAMERAS

Info

Publication number
FR2550351B1
FR2550351B1 FR8412249A FR8412249A FR2550351B1 FR 2550351 B1 FR2550351 B1 FR 2550351B1 FR 8412249 A FR8412249 A FR 8412249A FR 8412249 A FR8412249 A FR 8412249A FR 2550351 B1 FR2550351 B1 FR 2550351B1
Authority
FR
France
Prior art keywords
mirrored
slr cameras
fresnel focusing
focusing disc
disc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR8412249A
Other languages
French (fr)
Other versions
FR2550351A1 (en
Inventor
Rolf Jurenz
Horst Kodalle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentacon GmbH Foto und Feinwerktechnik
Original Assignee
Pentacon Dresden VEB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pentacon Dresden VEB filed Critical Pentacon Dresden VEB
Publication of FR2550351A1 publication Critical patent/FR2550351A1/en
Application granted granted Critical
Publication of FR2550351B1 publication Critical patent/FR2550351B1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Viewfinders (AREA)
FR8412249A 1983-08-02 1984-08-02 FRESNEL FOCUSING DISC FOR MIRRORED SLR CAMERAS Expired FR2550351B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD25361983A DD218196A1 (en) 1983-08-02 1983-08-02 FRESNEL ADJUSTING DISC FOR SR CAMERAS

Publications (2)

Publication Number Publication Date
FR2550351A1 FR2550351A1 (en) 1985-02-08
FR2550351B1 true FR2550351B1 (en) 1988-04-08

Family

ID=5549512

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8412249A Expired FR2550351B1 (en) 1983-08-02 1984-08-02 FRESNEL FOCUSING DISC FOR MIRRORED SLR CAMERAS

Country Status (3)

Country Link
DD (1) DD218196A1 (en)
DE (1) DE3420386A1 (en)
FR (1) FR2550351B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850431A1 (en) * 1998-10-27 2000-05-11 Siemens Ag Optical element for optical data transmission

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR66987E (en) * 1954-10-08 1957-11-04 Zeiss Ikon Ag Focusing plate for photographic cameras
FR1180268A (en) * 1956-07-28 1959-06-03 Zeiss Ikon Ag Multi-focal lens
US3004470A (en) * 1956-07-28 1961-10-17 Zeiss Ikon A G Stuttgart Multiple focal length lens
DE1154713B (en) * 1960-07-07 1963-09-19 Voigtlaender Ag Focusing screen for single lens reflex cameras
AT235690B (en) * 1962-05-22 1964-09-10 Kamera & Kinowerke Dresden Veb Image adjustment system
DE2657424A1 (en) * 1976-12-17 1978-06-22 Agfa Gevaert Ag PHOTOGRAPHIC CAMERA WITH AN ADJUSTING DISC
JPS5492232A (en) * 1977-12-28 1979-07-21 Canon Inc Camera
DD145806A1 (en) * 1979-08-31 1981-01-07 Rolf Jurenz DEVICE FOR DISPLAYING DATA IN AN SR CAMERA

Also Published As

Publication number Publication date
DE3420386A1 (en) 1985-02-21
FR2550351A1 (en) 1985-02-08
DD218196A1 (en) 1985-01-30

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse