Line of twin-lens and single-lens reflex cameras by Rollei
A Rolleiflex 2.8 FSwiss writer and photographer Annemarie Schwarzenbach holding the Rolleiflex Standard 621 (1938).The camera is held at the waist, with the viewfinder mounted on top (here, a Rolleiflex SLX).
Rolleiflex is the name of a long-running and diverse line of high-end cameras originally made by the German company Franke & Heidecke, and later Rollei-Werke.