Not even sure this store stocks Pentax cameras, i'll find out Sat On Wed, Mar 19, 2014 at 7:05 PM, Bruce Walker <bruce.wal...@gmail.com> wrote: > 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 <pentko...@gmail.com> 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 <bruce.wal...@gmail.com> 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 <pentko...@gmail.com> 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 >>>> <dario.bona...@virgilio.it> 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 >>>>> PDML@pdml.net >>>>> 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 >>>>> PDML@pdml.net >>>>> 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 >>>> PDML@pdml.net >>>> 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 >>> PDML@pdml.net >>> 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 >> PDML@pdml.net >> 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 > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions.
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