Original Caption Reads: "Russian leader Tsar Nicholas II looking through a periscope at the enemy position on the front line of the Eastern front during World War One, August 1914 " http://mirrorpixarchive.blogspot.com/2008_03_01_archive.html
There doesn't seem much point to this periscope; he seems to be standing on open ground, and the lenses are no higher than his head. As there are two lenses, is it actually a stereoscopic rangefinder rather than a periscope?
