File talk:Lens Petval 1841.jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Mistake

[edit]

This is not Petzval, this is Zeiss Protar.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File_talk:Lens_Petval_1841.jpg&oldid=407401722"