Property talk:P6790

Documentation

• Start a query
• Current uses
• Statistics by class
• Units
• Scale of values
• List of qualifiers
• Count

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.

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	→ 10 → 5.6
See also	ISO speed (P6789), exposure time (P6757), aperture (P7863)
Lists	Search Commons for files with property Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Minimum and maximum Items with highest numeric value Items with lowest numeric value Database reports/Constraint violations/P6790 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 27 Main statement 16 59.3% of uses Qualifier 11 40.7% of 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

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 report

Range 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