Recently I picked up a used Tokina 28-70 f2.8 on eBay. For the most part it seems like a nice lens but this one seems to have some an issue:
When I switch to manual focus it seems to hit some bumps and makes a grinding noise when I focus it. I would normally be okay with it if it didn't affect the image but it does. I placed the lens on a sandbagged locked down tripod and attempted a rack focus. When it hits a certain point from focusing the entire image jumps like the tripod shakes like someone hit it.
Furthermore the auto focus is really really noisy (not a big deal since I don't really take stills but might be indicative of the issue).
I tried several different attempts and verified the tripod was locked down.
Has anyone ever experienced this? Is there a fix? Should I just return the lens?
Edited by JeremyA, 07 September 2016 - 11:24 PM.