FR1196772A - focusing screen, in particular for reflex mirror cameras - Google Patents

focusing screen, in particular for reflex mirror cameras

Info

Publication number
FR1196772A
FR1196772A FR1196772DA FR1196772A FR 1196772 A FR1196772 A FR 1196772A FR 1196772D A FR1196772D A FR 1196772DA FR 1196772 A FR1196772 A FR 1196772A
Authority
FR
France
Prior art keywords
focusing screen
reflex mirror
mirror cameras
cameras
reflex
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
Other languages
French (fr)
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.)
Rollei Werke Franke und Heidecke GmbH and Co KG
Franke and Heydrich GmbH
Original Assignee
Rollei Werke Franke und Heidecke GmbH and Co KG
Franke and Heydrich GmbH
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 Rollei Werke Franke und Heidecke GmbH and Co KG, Franke and Heydrich GmbH filed Critical Rollei Werke Franke und Heidecke GmbH and Co KG
Application granted granted Critical
Publication of FR1196772A publication Critical patent/FR1196772A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/18—Focusing aids
    • G03B13/24—Focusing screens
    • G03B13/26—Focusing screens with magnifiers for inspecting image formed on screen

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR1196772D 1957-07-11 1958-06-11 focusing screen, in particular for reflex mirror cameras Expired FR1196772A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1196772X 1957-07-11

Publications (1)

Publication Number Publication Date
FR1196772A true FR1196772A (en) 1959-11-26

Family

ID=7731760

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1196772D Expired FR1196772A (en) 1957-07-11 1958-06-11 focusing screen, in particular for reflex mirror cameras

Country Status (1)

Country Link
FR (1) FR1196772A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453035A (en) * 1963-11-04 1969-07-01 Diffraction Ltd Inc Optical system with diffraction grating screen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453035A (en) * 1963-11-04 1969-07-01 Diffraction Ltd Inc Optical system with diffraction grating screen

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