File:Ptp p83 img01.png

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Captions

Captions

Petzval Portrait Lens (1840)

Summary

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Description
English: First illustration on page 64 (83) captioned “Petzval Portrait Lens, F/3.5” Credited as the first lens to be calculated by a mathematician.
Date
Source https://archive.org/details/PhotographyTheoryAndPractice
Author L.P. Clerc
Permission
(Reusing this file)
Public domain

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 Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

Licensing

[edit]
Public domain

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.

You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
 Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

File history

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Date/TimeThumbnailDimensionsUserComment
current06:14, 14 April 2011Thumbnail for version as of 06:14, 14 April 20111,650 × 894 (270 KB)Atelierelealbe (talk | contribs){{Information |Description ={{en|1=First illustration on page 64 (83) captioned “Petzval Portrait Lens, ''F''/3.5”}} |Source =http://www.archive.org/details/PhotographyTheoryAndPractice |Author =L.P. Clerc |Date =1937 |Per

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