Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
04-20-2008, 09:58 PM   #16
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 9,535
QuoteOriginally posted by LDB Quote
OK, so the first reply sounds like SDM is a good thing, the second like maybe it's not the best and the third like it's a bad thing. Can someone expand on SDM or suggest something to read on it? Thanks.
The two DA* lenses I have are equipped with the SDM motors in lens, but they also have the drive screw coupling. This latter allows them to be used with older Pentax AF cameras. If the 17-70 is SDM focus motors only, it will not work on any camera that does not have the SDM coupling and firmware. That means the K100D will not work, although the K100D Super will. The K10D, K200D and K20D all will work with SDM lenses.

Does that help clear up some of the smog? I hope so.

04-21-2008, 03:04 AM   #17
Forum Member
LDB's Avatar

Join Date: Apr 2008
Location: Texas
Posts: 63
That clears it up. Since I have no older equipment and no plans for a second body SDM is fine with the K10D I plan to get. Down the line as far as it would be for me to get a second body they'll probably be up to the K60D and I'll find a nice K40D upgrade and still be fine so for me, in my application, SDM seems best of the bunch. Thanks again.

  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
k-mount, pentax lens, sdm, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
645D, K-m2 and NEW LENSES DA*10-16/4 SDM, DA*20/2 SDM, DA*28/2 SDM ogl Pentax News and Rumors 165 08-11-2010 03:26 AM
DA 17-70mm SDM vs DA* 16-50mm SDM? shang Pentax SLR Lens Discussion 4 07-02-2010 06:09 AM
New 55mm SDM 645D lens means no SDM II? alehel Pentax News and Rumors 11 03-14-2010 09:43 AM
New SDM rear TC, SDM only or SDM + screw drive? morfic Pentax SLR Lens Discussion 1 10-01-2008 08:23 AM
Lens offer from Amazon: DA* 50-135 SDM & DA* 16-50 SDM f8 Pentax SLR Lens Discussion 4 03-25-2008 04:45 AM

All times are GMT -7. The time now is 11:49 AM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]