Property talk:P6790
Jump to navigation
Jump to search
Documentation
f-number
ratio of the system's focal length to the diameter of the entrance pupil. Sample: 4 (generally written "ƒ/4") for a lens with 200 mm focal length using an entrance pupil diameter of 50 mm.
ratio of the system's focal length to the diameter of the entrance pupil. Sample: 4 (generally written "ƒ/4") for a lens with 200 mm focal length using an entrance pupil diameter of 50 mm.
Represents | f-number (Q862169) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Data type | Quantity | |||||||||
Allowed values | 0.1 ≤ 𝓧 ≤ 1001 ≤ 𝓧 ≤ 25 | |||||||||
Allowed units | not applicable | |||||||||
Example | Dülmen, North Rhine-Westphalia, Germany (Q34788400) → 13 Afghan Girl (Q19819228) → 2.5 | |||||||||
Commons example |
| |||||||||
See also | ISO speed (P6789), exposure time (P6757), aperture (P7863) | |||||||||
Lists |
| |||||||||
Proposal discussion | Proposal discussion | |||||||||
Current uses |
|
[create Create a translatable help page (preferably in English) for this property to be included here]
Units: “novalue”: value unit must be one of listed. (Help)
Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). List of violations of this constraint: Database reports/Constraint violations/P6790#Units
constraint “subject type constraint (Q21503250)” declaration error: “required qualifier “class (P2308)” is missing”.
Range from “0.1” to “100”: values should be in the range from “0.1” to “100”. (Help)
List of violations of this constraint: Database reports/Constraint violations/P6790#Range, hourly updated reportRange from “1” to “25”: values should be in the range from “1” to “25”. (Help)
Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). List of violations of this constraint: Database reports/Constraint violations/P6790#Range