Lens Design Evolution: Gauss, Double Gauss, Planar, Biotar and Biometar 

The Double Gauss lens, the origin of the Planar, Biotar and Biometar lens designs Already during his lifetime, Carl Friedrich Gauss (1777 – 1855, born in Braunschweig, Germany, many years … Continue reading Lens Design Evolution: Gauss, Double Gauss, Planar, Biotar and Biometar