One last thought: make sure you clean the mount contacts really thoroughly. And did you try it on another camera body besides your own?
On Wed, Mar 19, 2014 at 6:58 PM, David J Brooks <[email protected]> wrote: > Inside and outside. Inside 2 may be 3 seconds to get in focus. out > side 1-2 seconds > Another is on order for Sat if its still the same i'll get them to > order me the Sigma 17-70 2.8-4 the PF review is good > Even sales man said its to slow > > > Dave > > On Wed, Mar 19, 2014 at 6:53 PM, Bruce Walker <[email protected]> wrote: >> What kind of light was illuminating your subject? How contrasty was it? >> >> Try AF outdoors. >> >> When working correctly on the K20D, SDM can focus in something like >> 0.2 seconds. But in reduced light you can count on many seconds -- >> while the smile fades from your portrait subject ... >> >> This all improves quite noticeably on the K-3. But really low light >> still causes problems that I solve by switching to MF. >> >> >> On Wed, Mar 19, 2014 at 6:43 PM, David J Brooks <[email protected]> wrote: >>> Could be, i mostly tried it at 650-70 length. It was and i', m not >>> exagerating at least 2-3 if not more seconds to focus. You could see >>> it in th efinder getting closer and closer and hey there ist in focus. >>> Not sure i want something i need to just hold and hope. >>> >>> Dave >>> >>> On Wed, Mar 19, 2014 at 6:31 PM, Dario Bonazza >>> <[email protected]> wrote: >>>> Well, the DA* 50-135mm SDM is probably the slowest AF lens on Earth, >>>> gaining >>>> it the nickname of "the sloth". Generally speaking, SDM lenses are slower >>>> than both screw-driven ad DC Pentax AF lenses, so the DA 17-70mm is a good >>>> candidate for being another slow-AF lens. However, I own it and I don't >>>> find >>>> it THAT slow as you pointed out. >>>> There is however another problem I saw on several samples of that lens and >>>> is the almost impossibility to autofocus above 50mm focal length, hunting >>>> forever while you try & find the focus. Perhaps that's the problem you >>>> spotted. >>>> >>>> Dario >>>> >>>> -----Messaggio originale----- From: David J Brooks >>>> Sent: Wednesday, March 19, 2014 11:17 PM >>>> To: Pentax Discuss >>>> Subject: Pentax 17-70 f4 and SDM motor question >>>> >>>> >>>> Hi all >>>> >>>> I went to pick up above mentioned lens this afternoon. loks and feel >>>> nice on the K-5, however me thinks there is a problem. >>>> I know the AF of Canon and Nikon are quite fast leaving us Pentaxians >>>> hunting and pecking our way through landscapes and soccer photos, BUT, >>>> 2-3 seconds to lock on and focus on a static object.?? Me thinks >>>> that's a bit to slow. >>>> The salesman and i played with it for 10-15 minutes. It did get a tad >>>> faster to focus but it was still painfully slow. I know it will not be >>>> as snappy as my Nikon 70-200 f2,9 VR lens, you can barely hear >>>> anything and it locks on faster than Mike Johnson deleting a cat >>>> photo. >>>> >>>> So, am i missing something with this SDM system. Is it painfully slow >>>> or should it be as fast or faster to AF on a subject as the screw >>>> focus lenses. Do i need to adjust a menu setting or something. >>>> >>>> Another is on order for Saturday >>>> >>>> Dave >>>> >>>> -- >>>> Documenting Life in Rural Ontario. >>>> www.caughtinmotion.com >>>> http://brooksinthecountry.blogspot.com/ >>>> York Region, Ontario, Canada >>>> >>>> -- >>>> PDML Pentax-Discuss Mail List >>>> [email protected] >>>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>>> follow the directions. >>>> >>>> >>>> ----- >>>> Nessun virus nel messaggio. >>>> Controllato da AVG - www.avg.com >>>> Versione: 2013.0.3462 / Database dei virus: 3722/7216 - Data di rilascio: >>>> 19/03/2014 >>>> >>>> -- >>>> PDML Pentax-Discuss Mail List >>>> [email protected] >>>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>>> follow the directions. >>> >>> >>> >>> -- >>> Documenting Life in Rural Ontario. >>> www.caughtinmotion.com >>> http://brooksinthecountry.blogspot.com/ >>> York Region, Ontario, Canada >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> [email protected] >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >> >> >> >> -- >> -bmw >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > > -- > Documenting Life in Rural Ontario. > www.caughtinmotion.com > http://brooksinthecountry.blogspot.com/ > York Region, Ontario, Canada > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- -bmw -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
