Altura Photo Filters
These filters are great. They are inexpensive, BUT they have minimal color shift. The CPL, is great for what it is, I use it all the time, but it is made out of cheaper materials. The ND filter is ok, it works, and is about 2 stops. The UV filter really shouldn't be used. It does nothing, except add a layer to your Lens. For being a UV filter it actually causes flare and ghosting.
These filters are great. They are inexpensive, BUT they have minimal color shift. The CPL, is great for what it is, I use it all the time, but it is made out of cheaper materials. The ND filter is ok, it works, and is about 2 stops. The UV filter really shouldn't be used. It does nothing, except add a layer to your Lens. For being a UV filter it actually causes flare and ghosting.