Siegfried Czapski (1861–1907) was a German physicist and optician.
See the German Wikipedia article de:Siegfried Czapski for details of Siegried Czapski's life.
Czapski succeeded Ernst Abbe as the head of Carl Zeiss in Jena in 1903.
A street in Jena, near the Carl Zeiss works, is named after him: Siegfried-Czapski-Straße, a few blocks off Zeiss Promenade.
His most important publication was Theorie der optischen Instrumente, nach Abbe (Breslau: Trewendt, 1893).