Image: Cordouan6
Size of this preview: 400 × 599 pixels. Other resolutions: 160 × 240 pixels | 601 × 900 pixels.
Original image (601 × 900 pixels, file size: 197 KB, MIME type: image/jpeg)
Description: In 1854, Fresnel’s first lens was removed and a ... 1st order lens wasinstalled. That lens is still in use today.
Title: Cordouan6
Credit: Own work
Author: Thibault Grouas
Permission: GPL
Usage Terms: GNU General Public License
License: GPL
License Link: http://www.gnu.org/licenses/gpl.html
Attribution Required?: Yes
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