Keppler’s Vault 59: Zeiss Sphaerogon Nr. 18
It’s no secret that in the early 20th century, Zeiss was a name associated with some of the world’s best lenses. With the work done by Paul Rudolph and many other opticians, lenses like the Planar and Tessar in 1896 and 1902 respectively, became two of the most successful and…