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1 janv. 1860 - Harrison y Schnitzer adaptan un diafragma iris al grna angular de Petzval.

Ajouté au bande de temps:

Fotografia 1 AO1

ByBaalachi Villalobos
17 févr. 2018

Date:

1 janv. 1860
Maintenaint
~ Il y a 164 ans
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