The high-performance FL-50R boasts multiple adjustment modes including TTL Auto and manual, high-speed synchronisation - in Super FP Mode up to 1/4000th sec - and also features fast recycle intervals which can be as little as less than 1.3 sec. when using the SHV-1 Flash High-Voltage Set. The FL-50R boasts GN28 performance at a 12mm focal length (equivalent to 24mm on a 35mm camera; ISO 100) and a very powerful GN50 at a 42mm (equiv. to 84mm; ISO 100).