Results 1 to 5 of 5

Thread: Filter Factor

  1. #1

    Join Date
    Nov 2004
    Location
    Coram, Montana
    Posts
    93

    Filter Factor

    I purchased a used yellow Hoya filter. It is marked Y(K2). Does anyone recall what the filter factor is on that item?
    Thanks,
    Jerry Cunningham

  2. #2

    Join Date
    Sep 2003
    Location
    Buffalo, NY
    Posts
    286

    Re: Filter Factor

    Filter factor of 2, one stop increase of exposure.

  3. #3

    Join Date
    Nov 2004
    Location
    Coram, Montana
    Posts
    93

    Re: Filter Factor

    Thanks Robert

  4. #4
    おせわに なります! Andrew O'Neill's Avatar
    Join Date
    Sep 2003
    Location
    Coquitlam, BC, Canada, eh!
    Posts
    4,673

    Re: Filter Factor

    It can also depend on what film you use. I never follow published factors...they are general numbers, like factors for reciprocity effect.

  5. #5

    Join Date
    Apr 2006
    Location
    Hell's Kitchen, New York
    Posts
    525

    Re: Filter Factor

    A Wratten 8 (K2) has about 90% transmission over most of the spectrum, so you can use less than one stop, depending on the effect you want.

    Best,
    Helen

Similar Threads

  1. Bellows Extension calculation
    By Jonathan Brewer in forum Style & Technique
    Replies: 15
    Last Post: 20-Jun-2010, 14:21
  2. center filter question
    By jeff ross in forum Lenses & Lens Accessories
    Replies: 9
    Last Post: 13-Jul-2006, 14:54
  3. Rodenstock center filter numbers
    By Leonard Evens in forum Lenses & Lens Accessories
    Replies: 6
    Last Post: 27-Jul-2005, 08:41
  4. A "Definitive" filter factor guide?
    By matthew blais in forum Style & Technique
    Replies: 2
    Last Post: 18-Jun-2005, 11:48
  5. Which filter factor to use
    By Lawrence Floyd, Jr. in forum Lenses & Lens Accessories
    Replies: 3
    Last Post: 25-Mar-2004, 19:30

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •