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Forum: Pentax SLR Lens Discussion
03-13-2013, 03:33 PM
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I thought HSM was from Sigma? Anyway, SDM is cursed and people have been warned since the beginning. The argument of QC issue from other manufacturers is just silly IMHO because C/N 2.8 zooms can AF far faster than anything SDM. They fail because of either defective motors or wear and tear, not substandard designs like SDM. If high performance 2.8 zooms are that important, why not just pick what are available on the market now instead of dreaming Pentax might address the damn SDM on day which may not come?
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