Cameras are NOT included.
It is only for GoPro HERO 4 Black.
This is NOT compatible with Silver and GoPro HERO 3 series.
Please prepare cameras and lenses yourself.
You have to attach the lens on your own.
You also have to do the assembling on your own.
There may be white spots inside the lens, but it was generated at the time of manufacture and can be used without affecting lens performance.