Pentax 540FGZ - AF - Hot-shoe clip-on Flash Operating Manual page 2

Thank you for purchasing the PENTAX Auto-flash AF540FGZ.
In addition to easy daylight sync photography with TTL auto, the AF540FGZ also allows wireless TTL auto (P-TTL
auto) photography and high-speed sync. It is a clip-on type flash which enables accurate focus adjustments even in
dark locations with built-in AF-assist spotbeam.
PENTAX is a trademark of HOYA CORPORATION.