Property
Aperture Size (f-number) v1.0
Active
URL: https://opendictionary-ecstest.test-bim.com/organization/25869347-9422-4528-ac1c-65954fa4061d/dictionary/4c7cdaf6-c405-44bf-9080-8359697e1668/property/815c3cdd-3c80-4211-b013-b1a1759fb5c8
GUID: a53912fb-c568-4f48-8aad-bb25e69765d1
Definition
The dimensionless geometric ratio of a lens's focal length to the diameter of its entrance pupil, strictly controlling photon transmission.
Description
Dictates the ultimate light-gathering capability, depth of field, and necessary exposure duration for optical and diagnostic imaging equipment.
Example
28
Technical definition
Data type
Float
Usage
Property groups (1)
Data templates (0)
No data templates found
References
Reference documents (2)
- ISO 12232 Photography ISO Speed v1.0
- ISO 517 Machine Tools Test Conditions v1.0