Use of Pentax Auto Extension Tubes

SmilinBob · 02-07-2019, 02:59 PM

Hello:

I have not had success using my set of 3 Pentax-brand auto extension tubes with my 18-55 Auto lens and Pentax K-r body. Is their use limited to manual lenses that have an aperture ring? Any advice on extension tube usage would be much appreciated.

I have happily shopped at B & H and will continue to do so. Thanks for the great service.

Be well,

Bob

Adam · 02-07-2019, 03:07 PM - **1 Like**

The Pentax tubes do require an aperture ring, yes. You may be able to find some used third-party ones with A-type contacts, or use a de-glassed teleconverter, but Pentax never made any of their own.

SmilinBob · 02-07-2019, 03:25 PM

Thanks, Adam.

02-07-2019, 02:59 PM	#1
SmilinBob Junior Member Join Date: Jun 2011 Location: Portland, OR Posts: 31	Use of Pentax Auto Extension Tubes Hello: I have not had success using my set of 3 Pentax-brand auto extension tubes with my 18-55 Auto lens and Pentax K-r body. Is their use limited to manual lenses that have an aperture ring? Any advice on extension tube usage would be much appreciated. I have happily shopped at B & H and will continue to do so. Thanks for the great service. Be well, Bob

02-07-2019, 03:07 PM - 1 Like	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	The Pentax tubes do require an aperture ring, yes. You may be able to find some used third-party ones with A-type contacts, or use a de-glassed teleconverter, but Pentax never made any of their own. 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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02-07-2019, 03:25 PM	#3
SmilinBob Junior Member Join Date: Jun 2011 Location: Portland, OR Posts: 31 Original Poster	Thanks, Adam.