Question for those who did their own repair of 50mm F/1.4's AF

Started Dec 26, 2016 | Discussions thread
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Carl S Contributing Member • Posts: 943
Question for those who did their own repair of 50mm F/1.4's AF

My 50 1.4's  AF has been unusable for several years now (been using another 50) but I would like to try the repair myself. However, before I open up the lens, I would like to ask if anyone knows if you can tell beforehand if the AF problem is the bent helicoid (fixable without needing any parts) or whether the AF drive needs to be replaced?

My particular lens will focus pretty smoothly when manually turning the focus ring whether the AF switch is on M or AF.  It does not stick when turning the focus ring, it just will not focus at all when trying to use the lens in AF mode. Any help would be appreciated, thanks.

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