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Old Aug 8, 2007, 3:05 AM   #4
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Join Date: Oct 2005
Posts: 7,451

Not saying it is the only way to go as I use Simga 1.4 and 2x TC's and found them to work better with my Sigma glass than the Kenko did. However if you are not looking for the best quality then I will leave it for people who have played with them both to give advice.
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