Property talk:P6790

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Documentation

f-number
ratio of the system's focal length to the diameter of the entrance pupil. Sample: 4 (generally written "Ζ’/4") for a lens with 200 mm focal length using an entrance pupil diameter of 50 mm.
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Units: β€œnovalue”: 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 β€œsubject type constraint (Q21503250)” declaration error: β€œrequired qualifier β€œclass (P2308)” is missing”.

Range from β€œ0.1” to β€œ100”: values should be in the range from β€œ0.1” to β€œ100”. (Help)
List of violations of this constraint: Database reports/Constraint violations/P6790#Range, hourly updated report
Range from β€œ1” to β€œ25”: values should be in the range from β€œ1” to β€œ25”. (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