Detail of my 1956 Rolleiflex Twin Lens Reflex (TLR) medium format camera.
The Rolleiflex was continuously manufactured in Braunschweig, West Germany, by Franke and Heidecke from 1928 to 1981, and was, for decades, the standard against which all other medium format cameras were measured. Some designs came close to the Rolleiflex for quality. But nothing surpassed it.
This particular model is fitted with the top flight Schneider Xenotar 80 millimetre f/2.8 taking lens, and is capable of producing (nominal) 6cm x 6cm negatives on 120 format roll film of phenomenal quality.
Even today the reborn Rollei company will sell you a modern Rolleiflex, Rollei Wide or Tele Rollei—if you can afford the purchase price. But they were always expensive, befitting their position in the marketplace as the finest cameras money could buy.
It is probably easier to try to list the all-time greats who didn’t use a Rolleiflex, than those who did—it dominated the industry for over thirty years, like no other camera before or since.