Attribute: focal_ratio

Subtypes

Subtype Type Units or Values Description
cameras
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Ratio of the lens's focal length, to the diameter of the entrance pupil. Also known as the "f-number" or "f-stop", this number indicates lens speed. Sample values: f/5, f/6.

other description
Ratio of the lens's focal length, to the diameter of the entrance pupil. Also known as the f-number or f-stop, this number indicates lens speed.