Whats the difference between “Reflex”, “RX” or “REX”?
The terms essentially mean the same thing: reflex. The letters “RX” inscribed on a lens identify it for use with reflex cameras. The model name “H-16 REX” (or H-8 REX), followed by a number, was used in the United States to refer to reflex cameras that incorporated a variable shutter. H16RX seems to be the preferred term in the UK, and perhaps other countries. As “REX”, “RX”, “RXVS” and “Reflex” were all used in official Paillard Bolex service and repair manuals, the terms could be considered a matter of personal preference. To reduce confusion, this website uses a naming convention for reflex cameras based on the usage by Paillard Incorporated during the 1950s and 1960s in the United States.