A simple variable ND filter (from polarisers)

Discussion in 'Accessories' started by hmpws, Jun 21, 2010.

  1. hmpws

    hmpws Mu-43 Regular

    Apr 24, 2010
    Auckland, New Zealand
    I saw this the other day:

    Simple Variable Neutral Density Filter

    I made one from a CPL and an old HOYA linear PL. Hopefully I will get a chance to use it (on a lens that doesn't rotate on focus, now that would drive me mad).
  2. OzRay

    OzRay Mu-43 Hall of Famer

    Jan 29, 2010
    South Gippsland, Australia
    Ray, not Oz
    That's a pretty old trick, but the problem lies mainly in the fact that you're introducing more lens elements (of indeterminant quality), wth greater seoparation, in front of a good lens. It's still much better to still use single element NDs.