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07-18-2009, 10:09 AM   #1
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Sigma 70-22 f2.8 with sigma 1.4/2.0 teleconverter?

A while back I read here that one could not use the AF on the Sigma 70-200 if attaching it to a Sigma 1.4 or 2.9 teleconverter. Sigma charts confirmed that.

However, I now see that Sigma says that the two will work together.

Any comments, thoughts, or suggestions

I have a K10d

07-18-2009, 10:41 AM   #2
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If you mean the 70-200mm, it does work with the KENKO 1.4x TC.
07-18-2009, 03:53 PM   #3
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QuoteOriginally posted by tmacdon Quote
A while back I read here that one could not use the AF on the Sigma 70-200 if attaching it to a Sigma 1.4 or 2.9 teleconverter. Sigma charts confirmed that.

However, I now see that Sigma says that the two will work together.

Any comments, thoughts, or suggestions

I have a K10d
If you have a 70-200 DG (older type), yes but not with the new HSM II lenses as the teleconverter(Pentax mount) is not compatible with the HSM system. I use the Kenko 1.5 Pz aF and it works fine.
07-19-2009, 03:29 AM   #4
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I have the older APO EX version with both converters and they work fine but as mentioned previously they do not work on the new HSM version.
I know this for certain as I bought my 1.4x off someone that had got it for their new Sigma lens.

07-19-2009, 05:31 PM   #5
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Thanks. Mine is the newer one (macro and HSM).

I somehow hoped (dreamed I guess) that Sigma had suddenly come out with a more Pentax-friendly teleconverter. Alas...

thanks for the Kenko tips.
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