On Sat, Mar 22, 2014 at 9:45 PM, Rob Studdert <[email protected]> wrote: > I bought the Sigma 17-70 2.8-4 a week ago when my Sigma 17-50/2.8 was > in for repair, I quite like it. It's pretty sharp, if it's not looking > great consider checking that it's actually focused, it may need some > focus adjustment.
I saw little difference between the two lenses, but the Pentax one llooked to me a tad sharper. I did not see the point of going and extra $100 just for 2.8 at the wide end, for a lens that will mostly be used at 45-70, still it was nice and quite and fast AF Dave >> >> Dave >> >> On Fri, Mar 21, 2014 at 1:59 PM, David J Brooks <[email protected]> wrote: >>> 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 >> >> >> >> -- >> 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. > > > > -- > Rob Studdert (Digital Image Studio) > Tel: +61-418-166-870 UTC +10 Hours > Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio > > -- > 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.
