GB908513A - Improvements in or relating to filters for photographic purposes - Google Patents

Improvements in or relating to filters for photographic purposes

Info

Publication number
GB908513A
GB908513A GB1217360A GB1217360A GB908513A GB 908513 A GB908513 A GB 908513A GB 1217360 A GB1217360 A GB 1217360A GB 1217360 A GB1217360 A GB 1217360A GB 908513 A GB908513 A GB 908513A
Authority
GB
United Kingdom
Prior art keywords
filters
relating
photographic purposes
april
fractive
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
GB1217360A
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.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz Wetzlar GmbH
Ernst Leitz 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 Ernst Leitz Wetzlar GmbH, Ernst Leitz GmbH filed Critical Ernst Leitz Wetzlar GmbH
Publication of GB908513A publication Critical patent/GB908513A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images

Abstract

908,513. Colour filters; lenses. LEITZ G.m.b.H., ERNST. April 6, 1960 [April 7, 1959], No. 12173/60. Drawings to Specification. Class 97 (1). A colour filter is formed by a lens without re- ' fractive power, i.e. an element having a convex face and a concave face of radii r 1 and r 2 respectively, an axial thickness d and a refractive index n related by the formula
GB1217360A 1959-04-07 1960-04-06 Improvements in or relating to filters for photographic purposes Expired GB908513A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL0032914 1959-04-07

Publications (1)

Publication Number Publication Date
GB908513A true GB908513A (en) 1962-10-17

Family

ID=7266090

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1217360A Expired GB908513A (en) 1959-04-07 1960-04-06 Improvements in or relating to filters for photographic purposes

Country Status (1)

Country Link
GB (1) GB908513A (en)

Similar Documents

Publication Publication Date Title
GB772912A (en) An optical system of high acceptance angle
GB908513A (en) Improvements in or relating to filters for photographic purposes
GB779614A (en) Photographic objective
GB824867A (en) Wide angle objective
GB749493A (en) Photographic objective
GB941930A (en) Photographic objectives
GB746201A (en) Improvement in lenses
GB706605A (en) Photographic objective
GB608735A (en) Improvements relating to spectacles and the like
GB1034458A (en) Photographic objective
GB555464A (en) Improvements in or relating to photographic objectives
GB560162A (en) Improvements in lenses
GB1018717A (en) Wide angle objective
USD180956S (en) Combined magnifier and bookmark
GB1020462A (en)
GB818807A (en) A wide aperture tele-photo-lens
GB857398A (en) A photographic or cinematographic high aperture tele-objective
GB820972A (en) An anamorphotic and focusing attachment for an objective
GB782570A (en) Photographic objective
GB795299A (en) Optical objective
GB769241A (en) Improvements in and relating to asymmetrical photographic objectives
GB602813A (en) Improvements in or relating to photographic objectives
GB846523A (en) Photographic objective
GB839723A (en) Improved optical lens system
GB870189A (en) A photographic or cinematographic tele-objectives of a numerical aperture of at least 1:2.8