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Thread: Tele-converter questions

  1. #1

    Default Tele-converter questions

    Been thinking about grabbing a TC to extend my reach.
    I'm on a 1.6 cropper, does that mean with a 1.4x TC my 70-200 f/4 becomes a 156.8 - 448 (70 * 1.6 * 1.4, 200 * 1.6 * 1.4) f/5.6 (losing 1 stop)?

  2. #2
    New Member kriegsketten's Avatar
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    Default Re: Tele-converter questions

    Quote Originally Posted by cks2k2 View Post
    Been thinking about grabbing a TC to extend my reach.
    I'm on a 1.6 cropper, does that mean with a 1.4x TC my 70-200 f/4 becomes a 156.8 - 448 (70 * 1.6 * 1.4, 200 * 1.6 * 1.4) f/5.6 (losing 1 stop)?
    Correct! I'm not familiar with Canon line-up, but make sure the TC works on your f/4 lens first! On Nikkors, some of the f/4 lenses coupled with TCs - the autofocus is not possible...
    Last edited by kriegsketten; 10th November 2010 at 04:39 PM.
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    Default Re: Tele-converter questions

    simple as 123.....example below

    XXmm X 1.4 = xxmm......

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