Originally posted by 7samurai
i'm wondering why they didn't upgrade the motor to DC.
Because there is no motor in that lens. It is screw drive, using the motor in the camera. Adding an in-lens motor would require a complete re-design. Not saying that would not be a good thing but refreshing the 55-300 with WR and HD allowed them to push it out the door in a reasonable time frame.
I know many people want Ricoh to wave the magic wand and create new lenses, new flash system, FF camera and beat all competitors but I don't think Ricoh has a magic wand. What they do have is dogged persistence to make things right. Think of Tortise and Hare story..... Ricoh will get there, I have every confidence, but on their time frame not ours. One tiny improvement at a time....