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01-17-2010, 03:53 PM   #1
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kenko teleconvertor

I just discovered that my Kenko 1.4x T.C, won't auto focus (electronics I presume) with my DA Star lenses. However, it will auto focus with my Sigma and Tamron lenses. Does anyone know if Pentax is currently selling a T.C. in the USA market? Does anyone know if a third party T.C. being sold in the USA market that will permit auto fucus of the DA Star series of Pentax lenses?

01-17-2010, 04:08 PM   #2
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Pentax doesn't have an SDM-capable TC available as yet and there's no word yet that one will become available.

Which DA* lenses do you use?
Tamron's 1.4x AF TC has varying success with DA* lenses, and best with the 200 and 300.
01-17-2010, 04:12 PM   #3
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Hmm, my Kenko 1.5x TC works fine with my DA* 60-250. Haven't tried with the 16-50 (since it doesn't really make sense for me to :-)
01-17-2010, 04:37 PM   #4
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The kenko 1.5x tc with SHQ on it will work with SDM as well as the one with DG in gold letters. The one that just has MC4 will not.

01-18-2010, 01:48 PM   #5
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QuoteOriginally posted by RawheaD Quote
Hmm, my Kenko 1.5x TC works fine with my DA* 60-250. Haven't tried with the 16-50 (since it doesn't really make sense for me to :-)
Same here. The DA* 16-50mm f2.8 has some difficulty focusing in low light, strangly enough my 60-250mm f4 works better...

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