New 82mm ICE HD Vari ND ND2 to ND400
Neutral Density Fader Filter Variable
Includes plastic case and front lens cap
Steplessly rotates from ND2 to ND400 and anywhere in between
Ultra-low reflective coating minimizes reflection
off internal CCD & CMOS sensors.
Multicoated (16 coatings) optical glass filter.
Under and over hard coating (both sides) 
Hard protection: Coating guards from scratches.
Water & Oil Repellant: water, oil, fingerprints simply wipe off.
Easy clean coating.
Height = 9mm (not including rear threads)
Metal, double threaded frame to allow additional filters or hoods.              
 4 main uses:
   1. Enables slower shutter speeds to be used.
       To display movement instead of freezing motion.  
       Example, creative waterfall shots.
   2. Decreases depth of field. Effecively blurring the background.
   3. Reduces the amount of light reaching the sensor,
       but with no affect on color balance.
       Reduces light intensity, (sunshine, snow etc).
   4. Allow video cameras to operate in bright light.