Thanks a lot to all who responded (wow, there were many responses, -
and many people who dealt with the failed SDM!).
I didn't have a chance to clean the contacts and re-check the mount yet.
I'll report back when I have updates on the issue.
Igor
Date: Mon, 16 Dec 2013 18:57:04 -0500 (EST)
Hi Igor: I would just like to add that my DA* 50-135 failed after 6 years of
service. I purchased it in 2007. Worked beautifully the whole time, then it
got tired, I suppose :-).
Cheers, Christine
On Dec 18, 2013, at 9:55 AM, Igor Roshchin s...@komkon.org wrote:
Thanks a lot to all who
6 whole years huh? most of my K M and A lenses are at least 30 years
old and have never failed yet.
On 12/18/2013 11:17 AM, Christine Aguila wrote:
Hi Igor: I would just like to add that my DA* 50-135 failed after 6 years of
service. I purchased it in 2007. Worked beautifully the whole
On Wed, Dec 18, 2013 at 12:13 PM, J.C. O'Connell hifis...@gate.net wrote:
6 whole years huh? most of my K M and A lenses are at least 30 years old and
have never failed yet.
Is that supposed to be a meaningful statement in the context of AF
system reliability?
--
PDML Pentax-Discuss Mail
On Dec 18, 2013, at 11:26 , Matthew Hunt m...@pobox.com wrote:
On Wed, Dec 18, 2013 at 12:13 PM, J.C. O'Connell hifis...@gate.net wrote:
6 whole years huh? most of my K M and A lenses are at least 30 years old
and have never failed yet.
Is that supposed to be a meaningful statement in
On Wed, Dec 18, 2013 at 12:33 PM, Charles Robinson charl...@visi.com wrote:
My interpretation of that is that gee, folks, if you stayed away from AF
lenses you wouldn't have these problems.
Which, while it might have meaning, isn't useful.
Yeah, I'm just not sure how it didn't autofocus
Some of the failures on Af lenses are related to poor build quality
overall, unrelated
to the AF system in particular.
On 12/18/2013 12:33 PM, Charles Robinson wrote:
On Dec 18, 2013, at 11:26 , Matthew Hunt m...@pobox.com wrote:
On Wed, Dec 18, 2013 at 12:13 PM, J.C. O'Connell
On Wed, Dec 18, 2013 at 12:39 PM, J.C. O'Connell hifis...@gate.net wrote:
Some of the failures on Af lenses are related to poor build quality overall,
unrelated
to the AF system in particular.
If you say so, but I hear of very few build quality problems on DA*
lenses, outside of the SDM
Matthew Hunt wrote:
On Wed, Dec 18, 2013 at 12:13 PM, J.C. O'Connell hifis...@gate.net wrote:
6 whole years huh? most of my K M and A lenses are at least 30 years old
and have never failed yet.
Is that supposed to be a meaningful statement in the context of AF
system reliability?
My Ford
on 2013-12-18 10:13 J.C. O'Connell wrote
6 whole years huh? most of my K M and A lenses are at least 30 years old and
have never failed yet.
don't the lenses with failed SDM still manual focus properly?
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PDML Pentax-Discuss Mail List
PDML@pdml.net
Sent from my iPad
On Dec 18, 2013, at 12:46 PM, steve harley p...@paper-ape.com wrote:
on 2013-12-18 10:13 J.C. O'Connell wrote
6 whole years huh? most of my K M and A lenses are at least 30 years old and
have never failed yet.
don't the lenses with failed SDM still manual focus
On Wed, Dec 18, 2013 at 1:58 PM, Christine Aguila christ...@caguila.com wrote:
On Dec 18, 2013, at 12:46 PM, steve harley p...@paper-ape.com wrote:
on 2013-12-18 10:13 J.C. O'Connell wrote
6 whole years huh? most of my K M and A lenses are at least 30 years old
and
have never failed yet.
On 18/12/2013 11:13 AM, J.C. O'Connell wrote:
6 whole years huh? most of my K M and A lenses are at least 30 years
old and have never failed yet.
Both my A50/1.2 and 100 f/2.8 macro have suffered failures. Obviously,
the more there is to go wrong with something, the more chance of failure
I have a question for those people who had SDM (or in general, lens
chip) failed and replaced.
I see that with one of the SDM lenses my K5 has the aperture and speed
settings rapidly (as in crazily) fluctuating. (And the focus shows MF,
regardless of the focus selector position.)
I was
I know you probably have, but I have to ask: did you clean the contacts well?
Correct me if I'm wrong but aperture is read by passing current
through the lens mount and the A pin. Oh wait. Digital lens. Hmm,
maybe the aperture is controlled with the chip. I only have screw
mount lenses, but
On 16/12/2013 5:57 PM, Igor Roshchin wrote:
I have a question for those people who had SDM (or in general, lens
chip) failed and replaced.
I see that with one of the SDM lenses my K5 has the aperture and speed
settings rapidly (as in crazily) fluctuating. (And the focus shows MF,
regardless
I meant to say screw drive lenses, though I do have a few screw mounts
as well. :)
On Mon, Dec 16, 2013 at 7:02 PM, Zos Xavius zosxav...@gmail.com wrote:
I know you probably have, but I have to ask: did you clean the contacts well?
Correct me if I'm wrong but aperture is read by passing
What Bill said.
Paul via phone
On Dec 16, 2013, at 7:02 PM, Bill anotherdrunken...@gmail.com wrote:
On 16/12/2013 5:57 PM, Igor Roshchin wrote:
I have a question for those people who had SDM (or in general, lens
chip) failed and replaced.
I see that with one of the SDM lenses my K5
...@komkon.org
Subject: Question for those who had SDM or lens chip replaced
I have a question for those people who had SDM (or in general, lens
chip) failed and replaced.
I see that with one of the SDM lenses my K5 has the aperture and speed
settings rapidly (as in crazily) fluctuating. (And the focus
My DA* 50-135 stopped focusing, but I didn't notice any other problems like you
describe. Pentax has since replaced the motor, and I also have a new circuit
board. It works nicely, though I still have to run it through more rigorous
paces--this weekend hopefully.
Cheers, Christine
Sent
The motor failed in my DA* 50-135, twice. Both times it went from
being slow to focus to being glacial to focus, then to needing a hand
focussing, and finally purely manual focus.
I'd second the suggestion to clean the contacts on both your lens and
camera body. Use a dry microfiber cloth, and
I saw nothing like that on my two 16-50 SDM failures. Just dead autofocus.
Chris
On 16 December 2013 23:57, Igor Roshchin s...@komkon.org wrote:
I have a question for those people who had SDM (or in general, lens
chip) failed and replaced.
I see that with one of the SDM lenses my K5 has
The symptoms you describe seems more likely to be caused by a general problem
with the mount. If cleaning the contacts doesnt fix it, check the screws that
holds the bayonet in place. Check both lens and camera for good measure.
Jostein
Igor Roshchin s...@komkon.org wrote:
I have a question
My 50-135mm failed twice (the second of which was my fault).
I have not seen any symptoms yike you described.
Yours seem to be different type of problem; likely minor.
Bulent
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