[go: up one dir, main page]

GB476348A - Improvements in or relating to photographic objectives - Google Patents

Improvements in or relating to photographic objectives

Info

Publication number
GB476348A
GB476348A GB2382937D GB2382937D GB476348A GB 476348 A GB476348 A GB 476348A GB 2382937 D GB2382937 D GB 2382937D GB 2382937 D GB2382937 D GB 2382937D GB 476348 A GB476348 A GB 476348A
Authority
GB
United Kingdom
Prior art keywords
collective
ivh
component
components
effect
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
GB2382937D
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.)
ALBRECHT WILHELM TRONNIER
Original Assignee
ALBRECHT WILHELM TRONNIER
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 ALBRECHT WILHELM TRONNIER filed Critical ALBRECHT WILHELM TRONNIER
Priority to GB2382937D priority Critical patent/GB476348A/en
Publication of GB476348A publication Critical patent/GB476348A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

476,348. Lenses. TRONNIER, A. W., Aug. 31, 1936, No. 23829. [Class 97 (i)] In a photographic objective comprising, in order from the front, two air-spaced collective components, a simple unsymmetrical dispersive component, and a collective component having a collective cemented surface, the surface effect of the said cemented surface K is numerically greater than À25 times, but not greater than 1À5 times, the sum of the surface effects of the first three components, and the surface effect of the front surface V1III of the dispersive component is numerically greater than one third of, but does not exceed, the surface effect of the rear surface IVh of the rear collective component. Preferably also the sum of the surface effects of the two front collective components is more than two-thirds, but not more than twice the surface effect of the surface IVh. The radius of the surface K is numerically less than 1À5 times that of the surface IVh. Data are given for the system shown having an aperture of f /2À9. Specifications 191,702, 193,376, 237,212, 237,529, [all in Class 97 (i)], 347,996, and 438,671 are referred to.
GB2382937D 1936-08-31 1936-08-31 Improvements in or relating to photographic objectives Expired GB476348A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2382937D GB476348A (en) 1936-08-31 1936-08-31 Improvements in or relating to photographic objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2382937D GB476348A (en) 1936-08-31 1936-08-31 Improvements in or relating to photographic objectives

Publications (1)

Publication Number Publication Date
GB476348A true GB476348A (en) 1937-12-07

Family

ID=10201987

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2382937D Expired GB476348A (en) 1936-08-31 1936-08-31 Improvements in or relating to photographic objectives

Country Status (1)

Country Link
GB (1) GB476348A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2165660A (en) * 1984-10-12 1986-04-16 Vivitar Corp Three group internal focusing lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2165660A (en) * 1984-10-12 1986-04-16 Vivitar Corp Three group internal focusing lens

Similar Documents

Publication Publication Date Title
GB476348A (en) Improvements in or relating to photographic objectives
GB517503A (en) Improvements in or relating to lens systems
GB409465A (en) Improvements in optical eyepieces
GB476349A (en) Improvements in or relating to photographic objectives
GB522651A (en) Improvements in or relating to optical objectives
GB587792A (en) Triplet objective lens
GB497550A (en) Improvements in or relating to optical objectives
GB532950A (en) Improvements in or relating to optical objectives
GB523446A (en) Improvements in or relating to optical objectives
GB563359A (en) Improvements in or relating to telephoto lenses
GB480643A (en) Improved photographic lens system
GB474815A (en) Improvements in and relating to objectives
GB602813A (en) Improvements in or relating to photographic objectives
GB375723A (en) Improvements in lens systems
GB487712A (en) Improvements in photographic objectives
GB559203A (en) Improvements in or relating to telephoto objectives
GB548252A (en) Improvements in or relating to high aperture objectives
GB528588A (en) Apparatus for colour photography
GB548253A (en) Improvements in or relating to photographic objectives
GB506321A (en) Improvements in microscope objectives
GB477424A (en) Improvements in objectives
GB518467A (en) Improvements in lens systems
GB461554A (en) Improvements in photographic objectives
GB492311A (en) Improvements in and relating to objectives for photographic purposes
GB438860A (en) Improvements in microscope objectives