1.4x TC mod

Started Feb 3, 2013 | Discussions thread
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Re: 1.4x TC mod
In reply to Antone, Feb 4, 2013

Antone wrote:

yvind Strm wrote:

OS is always lost in these conversions, because the signals and/or cabling differ between Sigma and Canon. Its a hit with AF, AE, AA, but not OS.

But he's not talking about a modified 2x TC, he's talking about an off-the-shelf TC is causing his OS to fail (as I understand his post). If it's an unmodified 2x (or 1.4x) TC, OS should work (mine does with the 150-500) but autofocus will not.

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Jim first posted that the OS doesn't work with the 2x TC. His second follow up post seemed to imply that it was actually the AF that doesn't work with the 2x TC, which should be expected.

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