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11-19-2012, 08:45 AM   #16
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I have the Tammy 70-200's older brother - the Adaptall SP 80-200/2.8 - which is essentially identical in optical performance. Remove the optics from any 2x TC with PK/A contacts and use it as an extension tube. You'll gain all the close-focus advantage you can effectively use with a lens of that size and weight and loose only about 1 1/2 stops of practical speed -- and auto-focus too, but that's rarely a problem under those circumstances.

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70-200mm, 70-200mm f/2.8 di, af, di, f/2.8, f/2.8 di ld, k-mount, ld, macro, pentax lens, slr lens, tamron, tamron 70-200mm f/2.8
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