And there is a fan that sucks air in through that slit. While your drone is going up to 36mph of forward motion. The more I think of it, the more I'm wondering if the dome is intended for FPV racing or similar, non-photographic use.
Bozo prize to whomever designs and comes up with a optic quality dome that incorporates a neutral density gradient.
Who's FPV racing with a quad that only goes 40mph?