Results 1 to 2 of 2

Thread: macro

  1. #1

    Default macro

    How do you convert 200mm, 1:4 mag ratio to 1:1 terms. I just want to know what my half-XXXX 28-200mm 1:4 macro lens is equivalent to in terms of a true macro lens. Does this make sense?

  2. #2
    Join Date
    Feb 2002
    sg - bukit ho swee


    for ta 200mm lens to get 1:1 for non-IF lens:
    => length of extension tube to add-on=200mm minus max extension at closest focus

    i.e. if your max extension at closest focus is 85mm, then u need to add on another 115mm of extension tube to get 1:1.


Posting Permissions

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