49mm Black Soft Diffusion 1 Filter with 28 Multi-Layer Coatings Hydrophobic/Scratch Resistant

SKU: KF01.1661

A
Like any other filter, this protects the front lens from water splashes. 
A
I think both filters are good, depending on the desired effect. 
A
Hello! Yes they have. That's exactly what I did today... An ND filter pre-screwed. :)