Sigma 2x teleconverter

Discussion in 'Lens Lust' started by Brew, May 9, 2005.

  1. Brew

    Brew Guest

    I have a Sigma 70-200 f2.8 HSM lens and sometimes need more reach, especially when shooting those pesky little finch and other timid birdies.

    What are the major draw backs other then the f stop multiplication when using a teleconverter?
  2. Well, I have witnessed some quality decrease, depending on the aperture and of'course the TC, but that's about it.
    When I use the 80-200mm with a x2 TC, I get worse results than my 80-400mm (both at f/5.6)

    But, since I'm not a major user of TCs, my opinion is just a drop in the ocean...
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