File:Looking up into the third-order Fresnel lens at Au Sable (4a1a41a5-5250-4380-8aa7-8d79b1e55bd2).JPG
Original file (3,024 × 4,032 pixels, file size: 3.07 MB, MIME type: image/jpeg)
Captions
Camera location | 46° 40′ 21.83″ N, 86° 08′ 22.54″ W | View this and other nearby images on: OpenStreetMap | 46.672731; -86.139594 |
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Summary[edit]
English: Looking up into the third-order Fresnel lens at Au Sable | |||||
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Photographer |
English: NPS Photo |
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Title |
English: Looking up into the third-order Fresnel lens at Au Sable |
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Description |
English: Glass pieces make up the lens. The glass pieces are prism shaped and help amplify the light so it can be seen further. A third-order Fresnel lens reflected the first light. The fixed white beam could be seen 17 miles out on Lake Superior. The lighthouse became fully automated in 1958 and transferred from the Coast Guard to the National Park Service in 1968.
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Depicted place |
English: Pictured Rocks National Lakeshore, Alger County, Michigan |
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Date | Taken on 2 August 2018 | ||||
Accession number | |||||
Source |
English: NPGallery |
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Permission (Reusing this file) |
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NPS Unit Code InfoField | PIRO |
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:48, 14 January 2022 | 3,024 × 4,032 (3.07 MB) | BMacZeroBot (talk | contribs) | Batch upload (Commons:Batch uploading/NPGallery) |
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File usage on Commons
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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 | Apple |
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Camera model | iPhone 6s |
Exposure time | 1/292 sec (0.0034246575342466) |
F-number | f/2.2 |
ISO speed rating | 25 |
Date and time of data generation | 15:21, 2 August 2018 |
Lens focal length | 4.15 mm |
Latitude | 46° 40′ 21.83″ N |
Longitude | 86° 8′ 22.54″ W |
Altitude | 202.491 meters above sea level |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | 11.2.5 |
File change date and time | 15:21, 2 August 2018 |
Y and C positioning | Centered |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 15:21, 2 August 2018 |
Meaning of each component |
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APEX shutter speed | 8.1913669064748 |
APEX aperture | 2.2750071245369 |
APEX brightness | 8.4282907662083 |
APEX exposure bias | 0 |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
DateTimeOriginal subseconds | 371 |
DateTimeDigitized subseconds | 371 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
Scene type | A directly photographed image |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Focal length in 35 mm film | 29 mm |
Scene capture type | Standard |
GPS time (atomic clock) | 19:21:55.02 |
Speed unit | Kilometers per hour |
Speed of GPS receiver | 0 |
Reference for direction of image | Magnetic direction |
Direction of image | 93.45703125 |
Reference for bearing of destination | Magnetic direction |
Bearing of destination | 93.45703125 |
GPS date | 2 August 2018 |