Claimed to be smaller and lighter than its competition, the 16mm f/1.4 R WR weighs 375g and is due to arrive in UK shops in mid-May.
It should deliver the 35mm viewing-angle equivalent of a 24mm lens.
Its weather-resistant structure features nine seals in eight areas on the lens barrel.
Fuji claims it can operate at temperatures as low as -10°C.
The wide angle of view makes it suitable for landscapes, portraits, street photography and macro work, explains Fuji.
Touted features also include close-focusing down to 15cm and an AF speed of 0.11sec.
The 13-elements-in-11-groups newcomer contains a Nano GI coating and is expected to cost £729.99.
Fuji claims the lens is around ‘40% the weight of its DSLR equivalent’.