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Old May 8, 2007, 12:11 PM   #1
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I own the 70-200 2.8 Sigma (new version with semi-macro), which performs very nicely on my Canon 20D. I am interested inadding a teleconverter. Is there any objective info available on opticalcharacteristics of the Sigma 1.4 and 2 X converters? How about subjective opinions? Thanks.
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Old May 8, 2007, 12:57 PM   #2
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I have the orgininal Sigma 70-200 (non DG, non macro) and the sigma 1.4x TC. Subjectively I think overall performance with a 1.4x is good. The bokeh sometimes looksa little strange but it's still a good performing product. Here are some shots:








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Old May 8, 2007, 2:08 PM   #3
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2 X Extender on the Canon 70-200 F2.8

Here is a thread that issue was covered several times here and are worth reading if you do a search or just look back a bit.
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Old May 8, 2007, 3:37 PM   #4
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i have both 1.4x and 2x. The 2x lately stays in the camera with the 120-300.


"Not much of degradation in picture quality with the 2x or 1.4x. Both works really well.


this one with a 2X

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Old May 8, 2007, 3:38 PM   #5
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this ones with a 1.4x converter on the 120-300


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