The Sony HVL-F28RM is a compact external flash with a guide number of 28 (ISO 100, 50mm), designed for Sony cameras with the Multi Interface Shoe. It supports TTL automatic exposure control and 2.4GHz wireless radio transmission with a range of up to 35 meters, functioning as either a commander or receiver in multi-flash setups.
It offers manual power adjustment in 25 levels (from 1/1 to 1/256), a recycle time of approx. 0.1–5 seconds, and automatic coverage for lenses from 24 to 50mm.
Its dust- and moisture-resistant construction ensures reliability in challenging environments. Flash output can be controlled directly from compatible camera menus. Powered by 2 AA batteries.