I've bought DA 50-135/2.8 six monthes ago. Autofocus has stopped working and lenses were replaced with new by the local seller
The replaced lenses (s/n 9007513) are loosing ability to stop autofocus from time to time. Seems that autofocus works only first time on the new charged accumulators.
I've asked to replace it again but local seller refused me because of some minor scratches on the lens hood mount.
I've found some
notice about serial numbers starting from 900... but there is no explanation - is it good or bad :-(
How do you think - does it make sense to send lenses to the pentax service center? Or buy Sigma and stop playing lottery with 50-135? The problem is that nearest service is in the StPeterburg, Russia and there is a lot of bad responces from users about it. Will Canadian service center accept lenses from Ukraine with blank warranty card?