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Old Jul 19, 2009, 9:05 PM   #28
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Originally Posted by interested_observer View Post
Just as Snostorm has indicated Tokina does not produce any lenses in the K mount. Years ago they did, but not any longer. However, there are a number of lenses that Pentax and Tokina seem to share. the 10-17, 12-24, 16-50, 50-135. The optical train are reported to be the same, however the external barrell design and the autofocus clutch are different, along with the coatings used.

Its been reported by some that Pentax does the optical design on some and then each company does their own externals, etc.
Thanks for the info I/O,
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