It's SDM, as are all Pentax lenses now. It's also internal focusing.

Paul via phone

> On Feb 19, 2016, at 7:37 AM, Jack Davis <[email protected]> wrote:
> 
> Sounds practical and would add
> versatility.
> Paul, I scanned the 150-450 specs,
> but don't recall if it is internal focusing or SDM. Could you advise?
> Thanks!
> J
> 
> Sent from my iPhone
> 
>> On Feb 19, 2016, at 4:05 AM, Paul Stenquist <[email protected]> wrote:
>> 
>> I will probably continue to use my k3 for some things. I also think I might 
>> shoot full frame with DA lenses and just frame loose and crop as I see fit.
>> 
>> Paul via phone
>> 
>>> On Feb 19, 2016, at 2:11 AM, Larry Colen <[email protected]> wrote:
>>> 
>>> 
>>> 
>>> John Francis wrote:
>>> 
>>>> 
>>>> Things that I don't like about the K-1 when compared to the K3-II:
>>>> 
>>>> o  Frame rate (for motorsports action shots I want all the fps I can get)
>>> Frame rate in crop is a lot better.
>>> 
>>> 
>>> 
>>> -- 
>>> Larry Colen  [email protected] (postbox on min4est) http://red4est.com/lrc
>>> 
>>> 
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