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Steve hobbs · 04-10-2012, 10:40 PM

Will the Vivitar 1.4x teleconverter from B&H autofocus when attached to my Sigma APO 70-300 f4.5-5.6 and/or my Sigma 70-200 1:2.8 II HSM and K5 body.

Adam · 04-10-2012, 10:54 PM

04-10-2012, 10:40 PM	#1
Steve hobbs Guest	Vivitar 1.4x teleconverter Will the Vivitar 1.4x teleconverter from B&H autofocus when attached to my Sigma APO 70-300 f4.5-5.6 and/or my Sigma 70-200 1:2.8 II HSM and K5 body.

04-10-2012, 10:54 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,609	it should AF with your screwdrive lens, but not with the HSM one. See here for details: https://www.pentaxforums.com/forums/pentax-beginners-corner-q/172704-new-vivi...converter.html Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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