I'm wondering if anyone else has had issues with the 2x extenders - both Mark II and Mark III sticking. The locking switch and/or pin sticks on them and prevents the lens mount from locking. This is really disconcerting with thousands of dollars attached to the end of it.
What happens is you twist your lens on until it clicks and all seems good. Then you touch your lens and it begins to twist off the extender or you get an error saying to clean your contacts. Either way, the lens is not secured! The pin/switch move, but I guess it gets stuck around 90% of the way to the full lock position and doesn't lock completely.
I had read that the Mark III was supposed to fix this, but my 300 f/2.8L IS II nearly bit the dust the other night due to this issue. A tiny drop of WD-40 took care of it, but I've never had this issue with the 1.4x Mark II or III and find this really disturbing. Has anyone else had this issue?
What happens is you twist your lens on until it clicks and all seems good. Then you touch your lens and it begins to twist off the extender or you get an error saying to clean your contacts. Either way, the lens is not secured! The pin/switch move, but I guess it gets stuck around 90% of the way to the full lock position and doesn't lock completely.
I had read that the Mark III was supposed to fix this, but my 300 f/2.8L IS II nearly bit the dust the other night due to this issue. A tiny drop of WD-40 took care of it, but I've never had this issue with the 1.4x Mark II or III and find this really disturbing. Has anyone else had this issue?