First of all, the following survey results once again verified that SDM is indeed rather unreliable and vulnerable to break, although some fanboys would still argue that the sample size returned in that survey is yet "not enough to prove anything"!http://www.pentaxforums.com/news/pentax-sdm-failure-survey-results.htmlQuoted:-"What is a little bit more alarming is the fact that three of Pentax's
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