Canon Extender EF 1.4x II

Discussion in 'Beyond the Basics' started by jseoung, Feb 4, 2009.

  1. jseoung

    jseoung TPF Noob!

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    Im confuse how that actually work....it says " Effective aperture is reduced by one f-stop" explain how does that work?

    sorry never really used one b4
     
  2. goodoneian

    goodoneian TPF Noob!

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    say you use on it on a lens that has a maximum aperture of f/2.8, with the teleconverter on it makes the maxiumum aperture f/4
     
  3. jseoung

    jseoung TPF Noob!

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    ohh okay...gotcha!!
     
  4. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    Also note that the canon 1.4 extender (or as everybody else calls them teleconverter) is not compatable with all canon lenses. The Canon TCs are made for the L range of lenses only, but they will not fit all L lenses - I and pretty sure that the list of lenses in your sig, none of them will be compatable with the canon TC.
    You might have luck with a sigma or kenko TC - sigma makes are pretty much as good as canon for optical quality although on full frame sensors they can show vignetting:
    Juza Nature Photography
     
  5. gryphonslair99

    gryphonslair99 Been spending a lot of time on here!

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    I agree with Overread and would add one thing about TC's in general. They really aren't designed to be used with any glass less than 100mm. The 24-105 is kind of iffy from what I have been told by others that have that lens as to the degredation of image quality. That is a judgment call for each person.

    TC's can be quite good when used on a quality lens of 200mm or more. The degredation on my 70-200 f2.8 is very little at 200mm and on my 400mm f2.8 it is virtually un noticable. This is with the Canon EX-1.4 II.
     
  6. EOS_JD

    EOS_JD TPF Noob!

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    The canon 1.4x certainly does NOT work with the 24-105. I have both.
     

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