Understanding The NX System
No Vignette at 15mm
The Cokin NX System is the first filter set up that will allow you to use wide-angle lenses with out any vignette up to 15mm.
Even out the exposure, control the highlights and add more detail in the shadows.
Wide Angle Adapters
These specific adapters allow the use of the Sony 14mm f1.8 GM and the Nikon 14-24 f2.8 S lenses.