Results 1 to 2 of 2

Thread: close up filter queries

  1. #1
    Member leowyien's Avatar
    Join Date
    Jan 2010
    Location
    Serangoon
    Posts
    859

    Default close up filter queries

    What does +4 on a close up filter mean?
    indie

  2. #2
    Senior Member Numnumball's Avatar
    Join Date
    Mar 2009
    Location
    Central
    Posts
    13,914

    Default Re: close up filter queries

    Its referring to diopter size in terms of magnifying

    Technically speaking, it's a term used to identify the refractive (light bending) capacity of a lens. In close up filters, there is a direct correlation between focal length and diopter. Each diopter increases the size of the viewed object by 1/4 (25%) when the object is at its full focal length from the lens.

    Hope this clarifies
    I turned PRO in diaper chg!
    My Flickr|My Son

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
  •