Note about preorder items - Order now online to reserve yours today.  While some items in certain sizes aren't normally stocked, they can be purchased in advance for the soonest possible delivery from the factory.
 
Thanks to its variable density, the first B+W Vario ND filter can be adjusted exactly to meet individual requirements. To this end, it comes with a continuous setting function with which the photographer can determine the required density reduction between +1 and +5 f-stops. 
To prevent aberrations, the light reduction cannot be set beyond a critical level. The XS-Pro Digital ND Vario MRC nano thus guarantees professional image results, even with high filter factors. The newly developed Vario ND filter can be adapted to a wide range of subject situations and photographic requirements. Sometimes large apertures are needed in bright ambient light in order to separate a model optically from the background.
Using several minutes of exposure time, architectural photographers can make people passing through the work space “invisible”. In landscape photography, flowing water or the surface of the sea can be made to appear fluffy and soft like cotton candy. 
 
More info here.