File:Point Reyes Lighthouse - Fresnel Lens (21740031891).jpg
Original file (1,215 × 1,996 pixels, file size: 1.5 MB, MIME type: image/jpeg)
Captions
Summary[edit]
DescriptionPoint Reyes Lighthouse - Fresnel Lens (21740031891).jpg |
Looking up from below the lens. The first-order Fresnel lens and is run by a clockwork mechanism. The top of the lantern is 11 m (37 ft) above the ground and focal plane of the light is 90 m (294 ft) above sea level. Point Reyes is, by official records, the windiest and foggiest on the Pacific Coast. The Point Reyes Lighthouse is in the Gulf of the Farallones on Point Reyes in Point Reyes National Seashore, located in Marin County. There are 308 steps down to the lighthouse itself, remember once there you have to walk back up. A lighthouse was assigned to Point Reyes in 1855, but construction was delayed for fifteen years because of a dispute over a fair price for the land. The lighthouse is a sixteen sided, 11 m (37 ft) tower, and a twin of Cape Mendocino Lighthouse. The first-order Fresnel lens was first lit on December 1, 1870. Electricity came to the lighthouse in 1938, and concrete steps were built into the cliff in 1939. The station was automated in 1975. The lighthouse was used as a location for the 1980 John Carpenter film The Fog. It is also the subject of a poem by Weldon Kees, "The Exposed Reef." Kees, together with filmmaker and photographer William Heick, later made a documentary film about the lighthouse and its environs in 1954-55. |
Date | |
Source | California-06515 - Fresnel Lens |
Author | Dennis Jarvis from Halifax, Canada |
Permission (Reusing this file) |
Quote from photographer on numerous files
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Camera location | 37° 59′ 48.13″ N, 123° 01′ 21.92″ W | View this and other nearby images on: OpenStreetMap | 37.996703; -123.022756 |
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This image was originally posted to Flickr by archer10 (Dennis) 116M Views at https://flickr.com/photos/22490717@N02/21740031891 (archive). It was reviewed on 28 February 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-sa-2.0. |
28 February 2018
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 23:42, 28 February 2018 | 1,215 × 1,996 (1.5 MB) | Artix Kreiger 2 (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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File usage on Commons
The following 2 pages use this file:
- File:California-06515 - Fresnel Lens (21740031891).jpg (file redirect)
- File:Lighthouse California-06515 - Fresnel Lens (21740031891).jpg (file redirect)
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | SONY |
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Camera model | DSC-HX9V |
Exposure time | 1/30 sec (0.033333333333333) |
F-number | f/3.3 |
ISO speed rating | 160 |
Date and time of data generation | 14:49, 9 August 2015 |
Lens focal length | 4.28 mm |
Width | 1,920 px |
Height | 1,080 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop Elements 14.0 (Macintosh) |
File change date and time | 04:05, 1 February 2016 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.3 |
Date and time of digitizing | 14:49, 9 August 2015 |
Meaning of each component |
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Image compression mode | 2 |
APEX shutter speed | 4.906891 |
APEX aperture | 3.444932 |
APEX brightness | 2.95078125 |
APEX exposure bias | 0 |
Maximum land aperture | 3.4375 APEX (f/3.29) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash fired, strobe return light detected, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Lens used | 4.3-68.5 mm f/3.3-5.9 |
Date metadata was last modified | 00:05, 1 February 2016 |
Unique ID of original document | 39EFF83AC6D451165A7A35DEA863CFC0 |