On Sat, Aug 22, 2009 at 6:44 PM, Joseph Tainterjtain...@mindspring.com wrote:
Until Pentax get these problems fixed, I won't buy any more SDM lenses. Hoya
has dramatically increased the price of lenses while refusing to improve
manufacturing quality.
Joe
My limited readings on the subject
Resend:
(probably obsolete by now but I am happy I can finally post)
Had the same thing on my K10D with a ten week old 16-50 bought from a
gentleman who claims he used it twice before having to put it up for sale to
raise funds for his house payments. Shaft drive wouldn't work either,
playing
Obviously not. If the chip in the lens tells the camera it's an SDM
lens, then by GOD that's what we'll use to focus. It's simple minded
programing, lots of state checking tends to slow things down when
everything is working right. It doesn't surprise me that there is no
fall back to a less
Pat wrote:
I purchased a used DA 16-50 from BH, rated at 9+. I put the lens on
my K200D and immediately realize that the lens won't auto focus
OTOH, when I place the lens on the *istDS, the lens will auto focus.
I'm guessing that the SDM component on the lens has failed. If that
is the
gldnbearz escribió:
I purchased a used DA 16-50 from BH, rated at 9+. I put the lens on
my K200D and immediately realize that the lens won't auto focus. I
check the AF/MF switches on both the camera body lens to make sure
that all was in the AF position (or rather, none was in the MF
Returning the lens is exactly what I intend to do... after I try it
out on the *istDS this weekend. Not my intended use for this lens,
but B H customer service is closed on Saturdays and UPS/FedEx
doesn't pick up on Sunday. It should give me enough info to see if I
can live with its size and
Is there a way to block the SDM contacts for an over-ride?
- Pat
On Sat, Aug 22, 2009 at 6:11 AM, P. J. Allingwebstertwenty...@gmail.com wrote:
Obviously not. If the chip in the lens tells the camera it's an SDM lens,
then by GOD that's what we'll use to focus. It's simple minded programing,
On Aug 22, 2009, at 17:29 , gldnbearz wrote:
Is there a way to block the SDM contacts for an over-ride?
All the digital data between the camera and the lens uses one single
pin. If you block that pin, you will have an unknown manual lens.
The other pins (and an illustration) are explained
You know that just might work if the existence of power contacts on the
lens is what tells the camera it's a SDM lens. However I suspect it's
actually querying the lens through the digital information contact.
It's shown on the figure on this page.
Oh, I knew to look out for that, (un)fortunately I won't have to with this lens.
What did you replace your 50-135 with (if you did)?
On Sat, Aug 22, 2009 at 9:44 AM, Joseph Tainterjtain...@mindspring.com wrote:
Yes, the SDM is faulty. If you get another copy of the lens, check carefully
for
I purchased a used DA 16-50 from BH, rated at 9+. I put the lens on
my K200D and immediately realize that the lens won't auto focus. I
check the AF/MF switches on both the camera body lens to make sure
that all was in the AF position (or rather, none was in the MF
position). I can manually
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