FR1212286A - Improvements to variable focal length lenses - Google Patents

Improvements to variable focal length lenses

Info

Publication number
FR1212286A
FR1212286A FR1212286DA FR1212286A FR 1212286 A FR1212286 A FR 1212286A FR 1212286D A FR1212286D A FR 1212286DA FR 1212286 A FR1212286 A FR 1212286A
Authority
FR
France
Prior art keywords
focal length
variable focal
length lenses
lenses
variable
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.)
TAYLOR
Taylor Taylor and Hobson Ltd
Original Assignee
TAYLOR
Taylor Taylor and Hobson Ltd
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 TAYLOR, Taylor Taylor and Hobson Ltd filed Critical TAYLOR
Application granted granted Critical
Publication of FR1212286A publication Critical patent/FR1212286A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
FR1212286D 1957-10-02 1956-10-02 Improvements to variable focal length lenses Expired FR1212286A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1212286X 1957-10-02

Publications (1)

Publication Number Publication Date
FR1212286A true FR1212286A (en) 1960-03-23

Family

ID=10882941

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1212286D Expired FR1212286A (en) 1957-10-02 1956-10-02 Improvements to variable focal length lenses

Country Status (1)

Country Link
FR (1) FR1212286A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1218178B (en) * 1959-12-24 1966-06-02 Bell & Howell Co Lens with continuously changeable focal length
DE1248325B (en) * 1960-09-22 1967-08-24 Enna Werk Optik Apelt Lens with continuously changeable focal length, especially for 35mm cameras

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1218178B (en) * 1959-12-24 1966-06-02 Bell & Howell Co Lens with continuously changeable focal length
DE1248325B (en) * 1960-09-22 1967-08-24 Enna Werk Optik Apelt Lens with continuously changeable focal length, especially for 35mm cameras

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