Sigma 1.4* Teleconverter Problems

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barneyrubble

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My 1.4* TC has started "wobbling" for want of a better word.

There are two plastic rings around the outside of it, one with SIGMA APO TELECONVERTER 1.4* EX DG written on it (This is the lower one). The top one moves away from the bottom ring, but only one the side where all the writing is. The other side, where the serial number is, doesn't move int he same way.

So when there is a lens on the camera, with the TC atttached, this must throw off the focusing which is what is causing my probkems (I'm guessing).

Has anyone else seen this type of problem? And short of replacing it does anyone know of a fix?
 
I think you can tighten the convertor up a bit - I read about this recently but I can't find the thread.
 
sigmas fall apart
I've been saying it for years but no one believes me

i got sick of taking them apart to tighten self tapping screws
 
Tighten up the screws.
 
Its the ones on the inside. Undo the outer screws and carefully remove the body mounting side and it reveals 4 more black headed screws. Tighten them up and it will be fine for a while, however, if you can undo them and add a weeny bit of loctite carefully before replacing them, that might be even better - no guarantees though I havent done it, but utmost care would be required. I posted a thread about this several months ago and now mine is just starting to loosen again so its a job for this weekend.


edit: Link to original thread if its any help
 
Anyone take this up with Sigma.
I was thinking of getting that converter. The lens I intend using it with can only use Sigma converters (so the instructions say).
 
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