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.
