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08-08-2011, 10:10 AM   #1
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Do 35mm SLR lenses autofocus on Pentax DSLRs (K-x) ?

Specifically this lens

Pentax Autofocus 70-300 F4-5.6 SIGMA DL MACRO (58) WITH CAPS 35MM SLR AUTO FOCUS ZOOM TELEPHOTO LENS - KEH.com

Will it work with Autofocus on my K-x ?

08-08-2011, 10:18 AM   #2
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It should.
Here you have some reviews:

https://www.pentaxforums.com/userreviews/sigma-70-300-1-4-5-6-dl-macro-auto-focus.html
08-08-2011, 01:29 PM   #3
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I believe mine is the same lens and yes, it does.
08-08-2011, 04:41 PM   #4
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I used to own this lens upto 2007. It used to autofocus fine on my K100D. Suffered from zoom creep though, as is to be expected of a consumer grade long zoom.

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