[ Version ( deprecated = true , deprecated_since = "0.16.0" , since = "0.14.0" ) ]
public double try_get_fnumber () throws Error
Warning: try_get_fnumber is deprecated since 0.16.0.
See https://en.wikipedia.org/wiki/F-number for more information.
Use [method@Metadata.get_fnumber] instead.
If Exif.Photo.FNumber does not exist, it will fall back to calculating the FNumber from Exif.Photo.ApertureValue (if available);
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An instance of [class@GExiv2.Metadata] |
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The exposure Fnumber as a gdouble, or -1.0 if tag is not present or invalid. |