Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

Variable ND filter dark and bright parts !?

Discussion in 'Pro/Adv Discussion' started by Karanba, Sep 25, 2016.

  1. Karanba

    Joined:
    Dec 26, 2015
    Messages:
    312
    Likes Received:
    21
    I have tried today to make some videos and then I have noticed these brught and dark parts of the video. Is that the oroblem with variable ND or something else ? Settings were on Auto.

    I think that the problem could be double glass on variable ND filter but I dont know for sure. In some way it looks great but that is no the look I was after.

    Thanks
     

    Attached Files:

  2. Ed_2020

    Joined:
    Apr 26, 2016
    Messages:
    36
    Likes Received:
    6
    Never used a variable ND, but as far as I know they are made of 2 polarizers put together, and polarizers are sensitive to the light direction, so it could be related to this (or the quality of the filter).
     
  3. Karanba

    Joined:
    Dec 26, 2015
    Messages:
    312
    Likes Received:
    21
    I think you might be right. Will try next time with ND16 and hope for the best. They are Neewer and they are great quality but this may be the only negative that variable ND has.
     
  4. Ed_2020

    Joined:
    Apr 26, 2016
    Messages:
    36
    Likes Received:
    6
    Nice effect anyway, at first glance I thought it was a toy or some miniature..
     
    Karanba likes this.
  5. asulliv54

    Joined:
    Nov 21, 2015
    Messages:
    114
    Likes Received:
    3
    The picture is nice even if it's not what you were after


    Sent from my iPad using PhantomPilots
     
  6. Karanba

    Joined:
    Dec 26, 2015
    Messages:
    312
    Likes Received:
    21
    That was video and it really looks like a pro but I was planning to make normal video :)
     
  7. Trinimon

    Joined:
    Aug 30, 2016
    Messages:
    118
    Likes Received:
    45
    Location:
    Canada
    What you have here is common when polarizers are used with wide angle lenses. The strongest effect is 90° away from the sun and since your drone's camera is so wide, you will have some areas of the frame in or close to max effect and the other lest effect. With variable ND filters, you basically have two polarizers cancelling each other out to increase/decrease the darkening effect.

    If you look at the shadow, the sun is almost behind the tractor and the two darkest areas are approx 90° to the sun.

    Makes for a cool effect in this shot though.
     
    Karanba likes this.