On Oct 2, 2010, at 5:53 PM, eckinator wrote: > 2010/10/2 paul stenquist <[email protected]>: >> >> What's DC? > > Direct Current AF motor. There was a mail here some time ago linking > to the patent document. Simple, robust looking design. > >> Have you had trouble with an SDM lens, Ecke? I know Robb and Celio did. Has >> anyone else on the list had a failure? I'm genuinely curious. > > yes I have. my DA*16-50 was both repaired and replaced under warranty > following two SDM motor failures. my current copy was acting up once > very briefly in sub zero temperatures but has been peaceful otherwise. > I hope it stays that way.
Thanks for the replay. Apparently, the problem is very common. Keeping my fingers crossed. Paul > > as to the "less use" theory expressed by some people, I was an > accessory to that, it was my gut feeling also and I also read it from > other people. nothing to substantiate that feeling. someone said the > grease might go sticky. I passed it on in here with a pinch of salt or > two. there was also a belief expressed by some that the problem was > limited to the SDM+screw lenses but I have no knowledge of how likely > that idea is to be accurate or applicable. I doubt it somewhat. I've > had a Canon body's mirror brake (for lack of a better word) go sticky > from lack of use though, apparently a common issue known as "Canon > Asthma" in these parts > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
