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English: Watch Tower on Alcatraz Island (San Francisco Bay, 2009). Alcatraz Island served as a light house, hosted a U.S. Army military installation, a military prison, and then (and probably most famously) as a United States Federal Penitentiary U.S.P. Alcatraz.
|View this and other nearby images on:||(Info)|
This image has been assessed using the Quality image guidelines and is considered a Quality image.
|Camera model||COOLPIX P6000|
|Orientation of image||1|
|Image resolution in width direction||300|
|Image resolution in height direction||300|
|Unit of X and Y resolution||2|
|Exposure time||10/2100 sec (0.0047619047619048)|
|F number||f / 5.2|
|ISO speed rating||64|
|Compressed bits per pixel||4|
|Lens focal length||8.1 mm|
|Date and time original image was generated||2009:01:18 11:58:30|
|Date and time image was made digital data||2009:01:18 11:58:30|
|Meaning of each component|
|Maximum lens aperture||2.9|