Results 1 to 7 of 7

Thread: Teleconverter suited for Sigma HSM MACRO 150mm F2.8

  1. #1

    Question Teleconverter suited for Sigma HSM MACRO 150mm F2.8

    Hi All,
    Anyone using a TC (with AF) on their Sigma HSM MACRO 150mm F2.8?
    What brand(s) are you using? 2x or 1.4x

    Thanks!

  2. #2
    Senior Member
    Join Date
    Nov 2004
    Location
    Tampines
    Posts
    8,167

    Default Re: Teleconverter suited for Sigma HSM MACRO 150mm F2.8

    Sigma lens work best with Sigma APO TC.
    2X will degrade the pic, get 1.4X will do unless you need the 2X reach.
    http://www.sigma-photo.co.jp/english...ondaitr.htm#04
    Last edited by donchua; 4th March 2006 at 09:47 PM.

  3. #3

    Default Re: Teleconverter suited for Sigma HSM MACRO 150mm F2.8

    Have you used tried the Sigma Macro 150mm HSM and the Sigma TC together before?

  4. #4

    Default Re: Teleconverter suited for Sigma HSM MACRO 150mm F2.8

    I have a question regarding Sigma 150mm Macro also.
    Why when the aperture is F/2.8, with a 2X on, will the resultant aperture
    be F/5.6 or F/8?
    1.4X 2X
    APO MACRO 150mm F2.8 EX DG HSM AF/MF MF

    Thx.

  5. #5
    Moderator Clown's Avatar
    Join Date
    Mar 2003
    Location
    Singapore
    Posts
    3,779

    Default Re: Teleconverter suited for Sigma HSM MACRO 150mm F2.8

    macro lenses' aperture will vary depending on your magnification factor.
    and i have known sigma lenses to only work with sigma TCs cuz of certain grooves on the mounting.
    sigh.

  6. #6

    Default Re: Teleconverter suited for Sigma HSM MACRO 150mm F2.8

    Quote Originally Posted by Clown
    macro lenses' aperture will vary depending on your magnification factor.
    and i have known sigma lenses to only work with sigma TCs cuz of certain grooves on the mounting.
    Is that why Sigma says with 2X TC, it loses its AF capability?
    I used to wonder why a F/2.8 lens loses AF with 2X TC attached.

  7. #7

    Default Re: Teleconverter suited for Sigma HSM MACRO 150mm F2.8

    I'll answer my own question.
    Can only use the Sigma 1.4x TC APO.

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
  •