Originally posted by jpzk That's not too comforting, is it ?
And, besides the confusion within their walls, how long did it take to get your lens back?
Thanks!
Once I approved the repair, everything indeed went rather fast, it was a SDM motor replacement, they probably had the motor in stock. The problem was trying to communicate about the problem. Once they quoted me that the SDM motor needed replacement, I wasn't so sure that it would solve the problem and so I tried to get more information. The lens had a weird problem where it wouldn't acquire focus between 90mm and 135mm while working fine below 90mm. Where I was most confused, is that the problem was exactly the same when I converted it to screwdrive focus. Thus the confusion about the fact that replacing the SDM motor would suddenly solve everything. When I tried to explain that the problem still persisted using screwdrive focus, all the technicians I spoke to would just tell me that the lens had an in lens focus motor and that it couldn't focus using screwdrive. I then linked to the forum thread about sdm to screwdrive conversion, and also explained that if they had an old Pentax digital body laying around, they could also force the lens to use screwdrive and then see for themselves that the problem was probably something else/in addition of the SDM motor. My hope was that they would just fix the "unable to achieve focus" problem without replacing the SDM motor, because I was fine using screw drive. Actually, now that I think of it, the SDM motor was still working when I sent them my lens - but when I asked them whether they understood the problem I was describing, they would say that they had no way of testing the inability to acquire focus at certain focal length because the lens motor was not working at all for them, thus my recommandation of using an older Pentax body - and bla bla bla. I was a little confused that the SDM would just suddenly die on them while it worked for me, but I guess it happens.
I just couldn't get them to tell me anything at all nor to acknowledge that the lens was indeed capable of focusing using the screwdrive motor in the camera body. It was a frustrating experience - I wish I just sent the lens with the firmware modified for screwdrive focus.
Happy to see that a lot of people here had a good experience with them, they seem to be doing a good job in general.