Originally posted by seventhdr The secret is to always exercise the SDM auto focus motor every few days. I understand the problem is the lubricants used in the quick shift mechanism. If you don't use the lens then the lubricants harden to such an extent that the SDM motor can bot turn the auto focus in the lens.
And yes, it is possible to convert this lens to screw drive only. There is a regular listing in the Marketplace for this service.
$200 seems like a very good price.
Regards
Chris
If it hasn't been used in 5 years, but works when I purchase it it works, is it safe to assume the SDM isn't damaged as of yet?
And if I convert it its guaranteed to work?
And k-50 can use the screw drive?
Thank you so much seventhdr
---------- Post added 10-12-18 at 09:31 PM ----------
Originally posted by seventhdr The secret is to always exercise the SDM auto focus motor every few days. I understand the problem is the lubricants used in the quick shift mechanism. If you don't use the lens then the lubricants harden to such an extent that the SDM motor can bot turn the auto focus in the lens.
And yes, it is possible to convert this lens to screw drive only. There is a regular listing in the Marketplace for this service.
$200 seems like a very good price.
Regards
Chris
I guess my real question is, if I buy it and the motor fails, am I almost guaranteed to still have a usable lens? I really want the lens but 200 is still a bit of money for me.
Nathan