Pentax 70-200 AF

C_Jones · 10-07-2016, 02:46 PM

I have read the following in a description of the D FA* Pentax 70-200 lens, "A Direct Current (DC) autofocus motor benefits from an internal focusing design and delivers fast, smooth, and quiet focusing performance." I know that the statement mentions the internal focusing design and due to that statement I am basically eliminating the thought of any external barrel movement during AF, but I would like to ask if there is any external barrel movement at all associated with the lens AF just to make sure. I would also like to mention that the DC type AF seems to be a known reliable type of AF system per comments I have seen along with the new Pentax 24-70 AF system. They both seem like reliable, excellent performance lenses I have been considering.

Adam · 10-07-2016, 03:01 PM - **1 Like**

There's no barrel movement due to AF or zooming

C_Jones · 10-07-2016, 05:07 PM

Originally posted by Adam

There's no barrel movement due to AF or zooming

Thank you Adam. That is what I needed to know.

10-07-2016, 02:46 PM	#1
C_Jones Pentaxian Join Date: Sep 2012 Location: NY Photos: Gallery \| Albums Posts: 6,084	Pentax 70-200 AF I have read the following in a description of the D FA* Pentax 70-200 lens, "A Direct Current (DC) autofocus motor benefits from an internal focusing design and delivers fast, smooth, and quiet focusing performance." I know that the statement mentions the internal focusing design and due to that statement I am basically eliminating the thought of any external barrel movement during AF, but I would like to ask if there is any external barrel movement at all associated with the lens AF just to make sure. I would also like to mention that the DC type AF seems to be a known reliable type of AF system per comments I have seen along with the new Pentax 24-70 AF system. They both seem like reliable, excellent performance lenses I have been considering.

10-07-2016, 03:01 PM - 1 Like	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	There's no barrel movement due to AF or zooming 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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10-07-2016, 05:07 PM	#3
C_Jones Pentaxian Join Date: Sep 2012 Location: NY Photos: Gallery \| Albums Posts: 6,084 Original Poster	Originally posted by Adam There's no barrel movement due to AF or zooming Thank you Adam. That is what I needed to know.