I bought this filter (cheap) just to protect the lens and it has done its job, beautiful construction, metal and flawless thread ring.
It has NO effect on UV (normal my Fuji HS30EXR already lentils and anti-UV treated sensor) but no way distorts the photos, or at dive or in color.
I recommend it as a protection, a claw quickly arrived and I prefer to change a filter that goal (and my wallet too !!!