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Thread: 2x teleplus converter

  1. #1
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    Question 2x teleplus converter

    any one with any idea whether a 2xteleplus converter works on the canon 100-400mm with auto focus?

  2. #2
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    I assume you're refering to 100-400mm f/4.5-5.6 L

    With any canon compactible 2X convertor, 100-400mm f/4.5-5.6 will become 200-800mm f/9-f11.

    I believe all canon bodies will loss auto focus after f/5.6 except the class belonging to Eos 3, Eos 1 as they still AF at f/8.

    In very bright condition, AF is still possible at f/11, however the AF cannot track fast moving object properly.

    An 2X AF will be useful for a f/2.8 lense since the max aperture is f/5.6 after adding the convertor. All canon bodies can AF with f/5.6 if the 2X AF is made for EF mount.
    Last edited by jasonpgc; 31st October 2002 at 12:40 AM.

  3. #3
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    A friend of mine will lend me the 2xTC (Teleplus), will see what this can do to the 100-400mm L IS U. (whether it can AF or not)
    Thanks for your reply.

  4. #4
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    I've tried the teleplus on the 100-400mm and its AF worked. But the f stop doesn't change, it stay as 4.5-5.6, very strange...

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  6. #6
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    Thanks Tweak, it's been great help.

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