2x teleconverter with autofocus for Sigma 50-500mm lens?

Discussion in 'Photography Equipment & Products' started by crawshs, May 2, 2007.

  1. crawshs

    crawshs TPF Noob!

    Joined:
    May 2, 2007
    Messages:
    3
    Likes Received:
    0
    Location:
    Berkhamsted, UK
    Can others edit my Photos:
    Photos OK to edit
    Hi, Does anyone know of a 2x teleconverter that I can use with my Sigma 50-500mm f/4-6.3 EX DG HSM lens which will support auto-focus? Am I expecting the impossible?

    Cheers,

    Simon
     
  2. fmw

    fmw No longer a newbie, moving up!

    Joined:
    Sep 30, 2006
    Messages:
    2,603
    Likes Received:
    137
    I hope you aren't expecting excellent image quality. In my experience the 1.4X or 1.5X converters are a bunch better. You can crop the images to the angle of view of a 2X and still do better than you would with a 2X. Get a heavy tripod.
     
  3. lostprophet

    lostprophet No longer a newbie, moving up!

    Joined:
    Feb 10, 2006
    Messages:
    11,770
    Likes Received:
    109
    Can others edit my Photos:
    Photos NOT OK to edit
    AF isn't possible with a 2x converter with that lens and from memory not even with a 1.4x
     
  4. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

    Joined:
    Dec 16, 2003
    Messages:
    33,822
    Likes Received:
    1,811
    Location:
    Edmonton
    Can others edit my Photos:
    Photos NOT OK to edit
    Welcome to the forum.

    Typically...most cameras need the light equivalent of F5.6 for autofocus to work. A 2x teleconvertor will steal about two stops of light....so if you look at your lens, with a max aperture of F3.5-4.5...then subtract two stops, you will have less light than F5.6...so auto focus probably won't work. You could still manually focus...but going back to what Fred said...it's probably best to forget about the 2X converter anyway...it will just hurt your image quality too much.
     
  5. crawshs

    crawshs TPF Noob!

    Joined:
    May 2, 2007
    Messages:
    3
    Likes Received:
    0
    Location:
    Berkhamsted, UK
    Can others edit my Photos:
    Photos OK to edit
    hey guys, thanks for the advice. know i'm pushing things quite a bit with that setup. i'll try playing with a 1.4x as you suggest.
     
  6. forzaF1

    forzaF1 Ultimate Ferrari Tifosi

    Joined:
    Aug 21, 2006
    Messages:
    136
    Likes Received:
    0
    Location:
    Nashville,TN
    Can others edit my Photos:
    Photos OK to edit
    I have a Nikon 2x teleconverter and it has been nothing less than great, but I use it with my 70-200mm f/2.8 VR, so I still have decent aperture. With that 50-500mm lens, you will not have very much light to work with, due to the teleconverter taking 2 whole stops away from you. The 2x teleconverter will only work really well on a lens with a sub f/2.8 level for the most part. With this said, the 1.4x and 1.7x teleconverters are also nice pieces of glass.
     
  7. JDP

    JDP TPF Noob!

    Joined:
    Aug 16, 2006
    Messages:
    285
    Likes Received:
    0
    Location:
    Minneapolis, MN
    Can others edit my Photos:
    Photos OK to edit
    And hey, if you have $8,000 you can always pick up an AF-S Nikkor 400mm f/2.8D IF-ED II That'll use a 2x teleconverter and still allow AF.

    And when you're done with it, I'll take it off your hands - how's $1,500 sound?
     
  8. crawshs

    crawshs TPF Noob!

    Joined:
    May 2, 2007
    Messages:
    3
    Likes Received:
    0
    Location:
    Berkhamsted, UK
    Can others edit my Photos:
    Photos OK to edit
    sounds like a bargain to me Jeremy, don't hold your breath though... :)
     

Share This Page

Search tags for this page
50-500mm with 2x teleconverter
,
best teleconverter for sigma 50-500
,
sigma 50-500 2x teleconverter
,

sigma 50-500 teleconverter

,

sigma 50-500 teleconverter nikon

,

sigma 50-500 with 2x teleconverter

,

sigma 50-500mm with teleconverter

,

teleconverter for sigma 50-500mm

,
teleconverter that can use autofocus with sigma 50-500mm lens
,

what teleconverter to use with sigma 50 500