File:Grubb reflector sight - sight picture 1.png
![File:Grubb reflector sight - sight picture 1.png](https://upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Grubb_reflector_sight_-_sight_picture_1.png/365px-Grubb_reflector_sight_-_sight_picture_1.png?20180711221800)
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Captions
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Summary
[edit]DescriptionGrubb reflector sight - sight picture 1.png |
English: Prototype of an early reflector sight, constructed by J. Emerson Reynolds und G. Rudolf Grubb based on a patent by Sir Howard Grubb. Photograph taken with focus on the sight; the reticle and background are so blurred as to be nearly invisible. |
Date |
circa 1901 date QS:P,+1901-00-00T00:00:00Z/9,P1480,Q5727902 |
Source | Howard Grubb: A New Collimating-telescope Gun-Sight For Large And Small Ordnance. In The Scientific transactions of the Royal Dublin Society. Vol. VII, August 1901. S. 321–330 (Online). |
Author | Unknown authorUnknown author |
Licensing
[edit]Public domainPublic domainfalsefalse |
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:18, 11 July 2018 | ![]() | 696 × 1,142 (1.09 MB) | Torana (talk | contribs) |
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Unique ID of original document | xmp.did:00379654-95dc-476f-9ad9-e27488dcea57 |
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Software used | GIMP 2.9/2.10 |
Horizontal resolution | 118.11 dpc |
Vertical resolution | 118.11 dpc |
File change date and time | 21:56, 11 July 2018 |