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Variable nd filter

Discussion in 'Fuji X100 Forum' started by Lukinross, Oct 30, 2012.

  1. Lukinross

    Lukinross SC Rookie

    12
    Sep 19, 2012
    Just got an variable nd filter with the rotating adjustment to nd 8. When at its darkest adjustment my x100 forms a dark x shape throughout the entire image (during daylight at beach). Any ideas on why? Am I forgetting something?
     
  2. bilzmale

    bilzmale Super Moderator Emeritus

    Jul 17, 2010
    Perth, Western Australia
    Bill Shinnick
    Can you post an example?
     
  3. Djarum

    Djarum SC All-Pro

    Jul 10, 2010
    Huntsville, AL
    Jason
    Post an example. Generally variable NDs work by having a circular polarizer on top of a linear polarizer. Generally speaking, other some off color cast, ND filters shouldn't perform as you describe.
     
  4. Pim

    Pim SC Regular

    157
    Apr 21, 2012
    Eindhoven, The Netherlands
    Pim
    I had the exact same thing when I purchased one a few months ago, there was even a note in the box saying this behavior was "normal" when used at the more extreme settings... Needless to say I did not agree with that and sent it back to replace with a fixed 8 stop filter, which performs just fine...
     
  5. Djarum

    Djarum SC All-Pro

    Jul 10, 2010
    Huntsville, AL
    Jason
    After doing some research on google, this is an issue with most variable ND's when pushing the limits of the ND filter, especially with wide focal lengths. I've never used one, but have thought about getting one. They seem too expensive for what they are since I can stack a circular and linear cheaper. Normally I use a 2 or 3 stop for waterfalls. On the rare occasion, I might stack them which works fine other than some vignetting at the wide angle. I've never had the need for more than 5 or 6 stops though.
     
  6. tdp

    tdp Guest

    My homemade VND made from bargain bin polarizers does the same thing when at it's darkest setting. The only way I can see it is if I shine a torch through it from the backside and work my way around the edges, there is an X there. I've never used it on the camera that dark so I've never seen it show up on images.
     
  7. Lukinross

    Lukinross SC Rookie

    12
    Sep 19, 2012
    DSCF0459.JPG

    Just a quick example... The reason i want 8 stops is I've seen some amazing broad daylight shots using that amount of filter...
     
  8. tdp

    tdp Guest

    Oh that just shows you where the pirates treasure is.
     
  9. Lukinross

    Lukinross SC Rookie

    12
    Sep 19, 2012
    That or the 4 tentacled quadtopus attacked my lens again!