GB2141273B - Method and apparatus for correlating depth of photographic field with maximum useable lens aperture setting - Google Patents
Method and apparatus for correlating depth of photographic field with maximum useable lens aperture settingInfo
- Publication number
- GB2141273B GB2141273B GB08407321A GB8407321A GB2141273B GB 2141273 B GB2141273 B GB 2141273B GB 08407321 A GB08407321 A GB 08407321A GB 8407321 A GB8407321 A GB 8407321A GB 2141273 B GB2141273 B GB 2141273B
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens aperture
- aperture setting
- photographic field
- maximum useable
- useable lens
- 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
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G1/00—Hand manipulated computing devices
- G06G1/0005—Hand manipulated computing devices characterised by a specific application
- G06G1/0042—Hand manipulated computing devices characterised by a specific application for optics, for photography
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Indication In Cameras, And Counting Of Exposures (AREA)
- Exposure Control For Cameras (AREA)
- Eyeglasses (AREA)
- Diaphragms For Cameras (AREA)
- Accessories Of Cameras (AREA)
- Studio Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US47868483A | 1983-03-25 | 1983-03-25 |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8407321D0 GB8407321D0 (en) | 1984-04-26 |
GB2141273A GB2141273A (en) | 1984-12-12 |
GB2141273B true GB2141273B (en) | 1987-04-01 |
Family
ID=23900960
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08407321A Expired GB2141273B (en) | 1983-03-25 | 1984-03-21 | Method and apparatus for correlating depth of photographic field with maximum useable lens aperture setting |
GB08606528A Expired GB2172723B (en) | 1983-03-25 | 1986-03-17 | Method for correlating depth of photographic field with maximum useable lens aperture setting |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08606528A Expired GB2172723B (en) | 1983-03-25 | 1986-03-17 | Method for correlating depth of photographic field with maximum useable lens aperture setting |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS6011823A (en) |
CA (1) | CA1218891A (en) |
DE (1) | DE3410835A1 (en) |
FR (1) | FR2543329A1 (en) |
GB (2) | GB2141273B (en) |
SE (1) | SE450428B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6266861A (en) * | 1985-09-19 | 1987-03-26 | 松永 是 | Sterilizing reactor |
GB2212955B (en) * | 1987-11-26 | 1992-08-12 | Frank John Allford Gilham | Photographic depth of field indicator |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB224930A (en) * | 1923-07-16 | 1924-11-17 | John R Hewett | Photographic exposure calculator |
GB569247A (en) * | 1943-05-19 | 1945-05-15 | Robert Townend | Improvements in computating devices for photography |
GB630786A (en) * | 1945-10-01 | 1949-10-21 | Joseph Antoine Legris | Improvements in or relating to photographic exposure calculators |
US2445008A (en) * | 1946-10-29 | 1948-07-13 | Smidt Arnold | Calculator |
FR1103403A (en) * | 1947-02-13 | 1955-11-03 | Universal depth of field calculator | |
GB924991A (en) * | 1959-05-04 | 1963-05-01 | Sangamo Weston | Improvements in or relating to photographic exposure meters |
GB1517742A (en) * | 1975-09-19 | 1978-07-12 | Samuelson Film Serv Ltd | Photographic depth-of-field calculators |
JPS634193Y2 (en) * | 1975-11-06 | 1988-02-02 |
-
1984
- 1984-03-21 GB GB08407321A patent/GB2141273B/en not_active Expired
- 1984-03-22 CA CA000450279A patent/CA1218891A/en not_active Expired
- 1984-03-22 SE SE8401610A patent/SE450428B/en not_active IP Right Cessation
- 1984-03-23 FR FR8404532A patent/FR2543329A1/en not_active Withdrawn
- 1984-03-23 DE DE19843410835 patent/DE3410835A1/en not_active Withdrawn
- 1984-03-26 JP JP5809584A patent/JPS6011823A/en active Pending
-
1986
- 1986-03-17 GB GB08606528A patent/GB2172723B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
SE8401610L (en) | 1984-09-26 |
SE8401610D0 (en) | 1984-03-22 |
GB8606528D0 (en) | 1986-04-23 |
SE450428B (en) | 1987-06-22 |
GB2172723A (en) | 1986-09-24 |
GB2172723B (en) | 1987-07-01 |
GB8407321D0 (en) | 1984-04-26 |
FR2543329A1 (en) | 1984-09-28 |
GB2141273A (en) | 1984-12-12 |
DE3410835A1 (en) | 1984-10-04 |
CA1218891A (en) | 1987-03-10 |
JPS6011823A (en) | 1985-01-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |