Dear Pentax, with all due respect with thousands of Pentax users, we have been very disappointed with your DA* lenses containing SDM auto focusing motor for a long time.Thousands of Pentax users from... continue reading »
"sdm sucks ducks nuts"
"Just got my 16-50 back from SDM repair"
"-"
"SDM needs improvements in speed and reliability."
"Please, Pentax, jfdi!!!"
"or make us more confident by offering a 6yr warranty like Sigma/Tamron"
"Fix SDM issues."
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