Answer :
Answer:
The correct option is;
Jena
Explanation:
The first anastigmatic lenses were calculated in 1886 in Jena by the mathematician Paul Rudolph, who was employed by Carl Zeiss, from the characteristics of the new Jena glasses (Jenaer Glas in German) which is a quality heat and shock resistant glass first invented and produced by Otto Schott
In 1889, the Zeiss Anastigmat, which was the first anastigmatic lens was launched and it in 1890it was renamed and sold as Protar.