Tamron 2x Teleconverter for Canon EOS EF Lenses?

Discussion in 'Canon' started by Matt McKay, Oct 27, 2003.

  1. Matt McKay

    Matt McKay Guest

    Matt McKay, Oct 27, 2003
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  2. Matt McKay

    Don Coon Guest

    Visit www.tamron.com They have a good page re their teleconverters.

    I bought the 1.4x for $60 from B&H and use it on my Canon 75-300. As
    expected I lose 1-stop but that's not usually a problem. The resulting
    images are less sharp and under the wrong conditions have more CA. I don't
    notice more noise.

    Contrary to specs the camera does autofocus beyond f4.5 (f4 for the 2x). I
    tried manual focusing and can't get it any better than the camera's AF.

    Bottom line: expect image degradation. But in my case shelling out $60 was
    worth the education : )

    Good Luck
    Don Coon, Oct 27, 2003
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  3. f-stop is focal length dependent. Double your focal length and you lose light.

    Glenn Woodell, Oct 27, 2003
  4. Matt McKay

    Tony Spadaro Guest

    If you are going to buy a TC - buy a good one. The Kenko MC-7 is good and
    the Kenko Pro 300 is better. Tamron markets the MC-7 as the SP.
    Tony Spadaro, Oct 27, 2003
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