File:Inner Range Light Lens.webm
Original file (WebM audio/video file, VP9/Opus, length 40 s, 1,280 × 720 pixels, 3.63 Mbps overall, file size: 17.25 MB)
Captions
Summary
[edit]DescriptionInner Range Light Lens.webm |
English: This video shows the original Duluth South Pier Inner Range Light fresnel lens in motion. It rotated around the light source and has flash panels that focused the light into distinct beams. This made the light appear to flash when viewed from a distance.
Originally, the mechanism that rotated the lens was a clockworks that worked very much like a large grandfather clock. Today it is rotated by an electric motor. The clockworks is still intact -- it is just no longer used. This lens is on display in the Canal Park Marine Museum in Duluth, MN. It was removed from the lighthouse in 1995 due to deterioration of the lens. It was restored and placed on display inside the museum. The lighthouse now used a plastic fresnel lens that is rotated by an electric motor. |
Date | |
Source | Inner Range Light Lens - Flickr |
Author | Pete Markham |
Licensing
[edit]- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This file, which was originally posted to
https://www.flickr.com/photos/pmarkham/7572655592/in/photolist-koZFKs-cxaQFs-5PVbz9-6Cd7jp, was reviewed on 7 February 2021 by reviewer LicenseReviewerBot, who confirmed that it was available there under the stated license on that date.
|
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 14:05, 30 November 2020 | 40 s, 1,280 × 720 (17.25 MB) | JotaCartas (talk | contribs) | Imported media from https://www.flickr.com/photos/pmarkham/7572655592/in/photolist-koZFKs-cxaQFs-5PVbz9-6Cd7jp |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
Transcode status
Update transcode statusMetadata
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.
Software used |
---|