There is a brand of camera called what Si

Phase One

Phase One, originating from Denmark, is the world's premier brand of digital camera systems, offering state-of-the-art, high-performance, medium-format digital camera systems and RAW file processing conversion software (Capture One) for professional photography.

Carl Zeiss, or Zeiss for short

Carl Zeiss (Carl Zeiss Jena) is a German company that manufactures optical systems, industrial measuring instruments and medical equipment, and is a world-class manufacturer of camera lenses. The history of Carl Zeiss lenses began in 1890 with the invention of the astigmatism-compensating lens called Anastigmat. Since then, Carl Zeiss has made a name for itself as a lens company with 150 years of tradition in the field of optical equipment such as medical series, bifocals, camera lenses, enlarging lenses, eyeglasses, and planetariums. Among them, the camera lens has the advantages of distinctive resolution, detailed depiction, uniform aperture, and hardened treatment of T* multilayer film emission.