Just after reading this thread I encountered Augustine's Laws "put forth by Norman 
Ralph Augustine, an American aerospace businessman who served as Under Secretary of the 
Army from 1975 to 1977."

Law #18 may be applicable here:

Law Number XVIII: It is very expensive to achieve high unreliability. It is not 
uncommon to increase the cost of an item by a factor of ten for each factor of 
ten degradation accomplished.

https://en.m.wikipedia.org/wiki/Augustine%27s_laws

On 9/15/2017 21:32, Rick Womer wrote:
Yeah, I’m sure they’ll fix it, too.

Meanwhile I have out-of-town leisure time in late Oct and early Nov, and may 
not have a working, suitable zoom.

Argh.

Should have bought the Sigma. The Pentax seemed the better lens, though, and I 
thought =surely= they’d have fixed the SDM in 9 years!

Rick

On Sep 15, 2017, at 7:24 PM, Paul Stenquist <pnstenqu...@comcast.net> wrote:

That's an older design. I assume they're locked into the original SDM Motor, 
but I'm sure they'll fix it.

Paul via phone

On Sep 15, 2017, at 10:33 AM, Rick Womer <rickpic...@gmail.com> wrote:

The SDM motor is failing on my 4-month old DA 17-70 lens.

One would think that in NINE years of production Pentax would have
corrected the well-known SDM motor problem.

Oy.

Rick

P.S. How long is Precision taking to fix things these days?




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Science - Questions we may never find answers for.
Religion - Answers we must never question.

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