----- Original Message ----- From: "Jens Bladt" Subject: SDM lenses
>
> On the Pentax usa website it is mentioned that the two new weather sealed
> lenses ("smc PENTAX-DA* 16-50mm F2.8 ED AL[IF]SDM" and "smc PENTAX-DA*
> 50-135mm F2.8 ED [IF]SDM") have built-in super sonic focusing motors.
>
> But there's no mentioneing of what SDM stands for.
Super Duper focusing Motor?
William Robb
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