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Pentax smc DA* 50-135mm SDM Issue

Started Dec 21, 2013 | Discussions thread
awaldram
awaldram Forum Pro • Posts: 13,271
Re: Same old explanations

As you asked where I got ny evidence that failure rates had normalized for SDM inc the 16-50 and 50-135.

Here are the stats form PF for 2011 (the only year with enough numbers)

percentage chance of failure worst to best

17-70 26%

16-50 23%

55 8%

300 8%

50-135 8 %

60-250 2%

200 0%

18-135 0%

I see no evidence to back up your claim on the frailties of the 16-50 and 50-135 as compared to the rest.

Could you post your evidence ?

You complain same old explanations but unless the facts change how can the conclusion?

I'm not a bif fan of Pentax's ultrasonic implementation and believe there was a lot cleaner ways to do it if you dropped backward compatibility, yet the accusations ledged against it I find unfounded and always without evidence.

For every member screaming from the rafters about their failed SDM there are 10 users quietly taking pictures with theirs.!

 awaldram's gear list:awaldram's gear list
Pentax K-x Pentax Q Olympus PEN E-PM2 Pentax Q7 Pentax K-3 +17 more
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