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 <pdml-m...@charter.net> 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
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