Kenco 2x Teleconverter

Discussion in 'Photography Equipment & Products' started by squishio, Aug 13, 2006.

  1. squishio

    squishio TPF Noob!

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  2. Big Mike

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

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    What is the maximum aperture of your lens?

    Auto focus on most cameras needs about F5.6 or wider for auto focus to work. A 2X teleconverter will steal about two stops of light. So if your maximum aperture is F4, then auto focus probably will not work, at least not in all situations.
     
  3. squishio

    squishio TPF Noob!

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    max apature is 3.5
     
  4. cecilc

    cecilc TPF Noob!

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    I'd be more concerned with the loss of image quality than I would the autofocus .... a 2x really degrades the image, and the "cheaper" the 2x the uglier the image.

    If you're going to use a TC at all, I think I'd stick with a 1.4x ... it will keep your autofocus (with a 1 stop loss) and the image won't be degraded as badly.
     

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