Inon S-220 Underwater Flash / StrobeInon S 220 is a compact but powerful underwater strobe capable of delivering GN22. The full scale performance coupled with a wide underwater beam angle provides unparalleled performance as a main strobe in all areas, regardless of whether for wide angle or macro photography or compact digital camera or SLR camera. Super Wide Beam of 140 Horizontal x 100 Vertical Underwater Created by Fly eye Dome Lens A precisely calculated and uniquely designed fly