GB198569A - Improvements in photographic objectives - Google Patents

Improvements in photographic objectives

Info

Publication number
GB198569A
GB198569A GB1690222A GB1690222A GB198569A GB 198569 A GB198569 A GB 198569A GB 1690222 A GB1690222 A GB 1690222A GB 1690222 A GB1690222 A GB 1690222A GB 198569 A GB198569 A GB 198569A
Authority
GB
United Kingdom
Prior art keywords
lens
lenses
diffusion
combination
image
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
GB1690222A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1690222A priority Critical patent/GB198569A/en
Publication of GB198569A publication Critical patent/GB198569A/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
    • G02B13/20—Soft-focus objectives

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

198,569. Graf, C. June 19, 1922. Lenses.-Photographic lenses of the anastigmat type consist of a fixed back combination and an adjustable front combination each consisting of two lenses separated by an air space. The front lens A is movable axially to introduce a desired degree of diffusion in the image. The maximum amount of diffusion is obtained when the lens A is in the position shown, and a sharp image is produced when withdrawn to the position indicated in dotted lines. The front component may have either the positive or the negative lens in front for adjustment. The movable lens is carried in a screwed mount.
GB1690222A 1922-06-19 1922-06-19 Improvements in photographic objectives Expired GB198569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1690222A GB198569A (en) 1922-06-19 1922-06-19 Improvements in photographic objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1690222A GB198569A (en) 1922-06-19 1922-06-19 Improvements in photographic objectives

Publications (1)

Publication Number Publication Date
GB198569A true GB198569A (en) 1923-06-07

Family

ID=10085727

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1690222A Expired GB198569A (en) 1922-06-19 1922-06-19 Improvements in photographic objectives

Country Status (1)

Country Link
GB (1) GB198569A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2657968A1 (en) * 1975-12-22 1977-06-23 Minolta Camera Kk SOFT LENS SYSTEM
GB2238399A (en) * 1989-10-25 1991-05-29 Asahi Optical Co Ltd Soft focus lens system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2657968A1 (en) * 1975-12-22 1977-06-23 Minolta Camera Kk SOFT LENS SYSTEM
GB2238399A (en) * 1989-10-25 1991-05-29 Asahi Optical Co Ltd Soft focus lens system
GB2238399B (en) * 1989-10-25 1993-08-18 Asahi Optical Co Ltd Soft focus lens system
US5267086A (en) * 1989-10-25 1993-11-30 Asahi Kogaku Kogyo K.K. Soft focus lens system

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