Guide Number 20 and UNDERWATER coverage 110 degree.
The next generation lightweight and reasonable standard D-200 strobe equipped optically designed dome lens offering wide 110 degree coverage UNDERWATER without any diffuser which can sacrifice power, is released on September 8th, 2018.
Not as like a conventional translucent diffuser which can widen coverage while it has to sacrifice power and store heat inside, this specially designed dome lens diffuse light thanks to reflection ratio of air, acrylic and water to attain UNDERWATER coverage 110 degree with all powerful output coming through. Comparing to the previous「D-2000」strobe, both of power and underwater coverage has been improved.
You can find more details in this attached press release.
