Schneider Optics has brought out a 77mm True-Match Vari-ND thread-in filter. The filter from Schneider Optics apparently allows you to select an f-stop and camera speed, and then dial in the exposure by intuitively selecting just the right amount of neutral density. The filter is designed for DSLR’s and Cine Compact cameras with high ISO settings in mind. Expect to pay around $495.
The Schneider Optics 77mm True-Match Vari-ND thread-in filter works by taking two carefully matched filters and stacking them in combination to produce a density range from 1-1/3 stop loss to 11 stops of light loss. By selecting the best quality materials, Schneider variable ND offer 11stops (ND3.3) attenuation with no blue color shift at maximum density which is a common problem with inferior and unmatched materials common in lesser variable ND filters.
Schneider’s superior glass filters greatly minimize blue shift at maximum density with interior quality brands. Step rings are available in common sizes to adapt to smaller lens thread diameters. The Vari-ND filter is also available in a True-Match Vari-ND Filter kit, which uses the Schneider 4” Filter Holder and two True-Match Filters for increased filter stacking capabilities.
See Schneider Optics for more details.