Originally posted by mfdesalas I noticed the new Pentax DA 18-135 F3.5-5.6ED AL [IF] DC WR lens sports a new focusing motor, called DC, which is supposedly an improvement on SDM. I hope it proves more reliable.
Is this Pentax admitting SDM was a failure?
I struggle to understand what possessed them to wait this long to address the appalling failure rate of the SDM lenses (though of course not officially, not in the open), and I fervently hope they bring out a successor to the DA* 16-50 and 50-135 lenses soon.
Is the K-5 an admission from Pentax that the K-7 was a failure?
Was the K-7 an admission from Pentax that the K20d was a failure?
Was the K20d an admission from Pentax that the K10d was a failure?
I've yet to see any statistical evidence that failure rate of SDM lenses is any higher than similar lenses from other brands. Until then, this is just the spreading of FUD.