Thanks for taking the time Mark C. The lenses are in to inspect. Salesman tested both lenses on what ever Pentax DSLR they have. Says the Pentax is better than the first one, but the Sigma i =s much faster on the AF than the Pentax.
Time will tell Saturday Dave On Thu, Mar 20, 2014 at 8:44 PM, Mark C <[email protected]> wrote: > I tested the 17-70 on my K-5. It was a *little* slower but I don't think > that I would have noticed if I had not been counting. The one thing I > noticed if that if the camera failed to achieve a focus lock and then I > tried to focus on a new subject, it took 1 to maybe 1.5 seconds to get a > lock. What I mean is - if I pointed it at a plain white wall the camera > often would not lock at all and just stop hunting after a short while. If I > then switched to a subject with high contrast elements it would take a > second or so to focus - longer than if I manual defocused the lens before > testing. > > I tried the lens on the K-01 and it consistently took about 2 seconds to > focus - no delay in the lens starting to search for the focus point, but it > moved slowly and generally took a couple of seconds to lock in. > > Just for fun I tried it on a K-10d and it routinely took 1-3 seconds to get > a lock, but it was surely the body's fault. The lens was hunting all the > time. > > It was interesting to compare the K-3, K-5< K-10 and K-01. Without a doubt > the K-3 blew all of the others away and I don't recall any shots when the > camera indicated the shot was in focus when it was not. I had a few issues > with the K-5 and many with the K-10. The K-01 was very accurate but very > slow. > > Hopefully the new lens will fix the problem you experienced. > > Mark > > > > On 3/20/2014 1:25 PM, David J Brooks wrote: >> >> On Thu, Mar 20, 2014 at 12:59 PM, Mark C <[email protected]> wrote: >>> >>> Hi David - >>> >>> I just tested my 17-70 @ 50mm indoors in dim light on a K-3. I tried >>> counting off the seconds "one-thousand-one..." but never got beyond >>> "thous...." usually stopped a "one..." I can try it on a K-5 tonight, but >>> mine is very fast. And quiet. >> >> Pleas do Mark if you can. The copy i tried started to slowly focus >> after 3 thousand so it probably took 2 one thousands.:-)Wehn the rep >> was trying i could see the focus ring ever so slowly moving, then bamo >> it was in focus. >> >> Dave >>> >>> Mark >>> >>> >>> On 3/19/2014 6:17 PM, David J Brooks wrote: >>>> >>>> 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 >>>> >>> >>> -- >>> 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. >> >> >> > > > -- > 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.
