1.4x teleconverter SonyA580

Started Aug 23, 2014 | Discussions thread
Calico Jack Senior Member • Posts: 2,306
I have one for sale, but there are differences between makes/models


Sigma TC's are designed to work only with Sigma lenses that have (IF) internal focusing. The distance between the TC and rear lens element is minute, so IQ is better retained, though the 1.4x EX DG APO is the one to get.  Other TC types with a dished recess are designed for lenses with a movable rear element to accept the element and rear lens.

You can find the Sigma teleconverter chart here and there's a fairly comprehensive TC chart on the Dyxum website.

FWIW, I have a Sigma 1.4x EX DG APO that has been endorsed by Sigma to be compatible with HSM lenses and SLT bodies (it's listed for sale in the DPR classifieds along with a lot of other items).  This is something you will need to check before you buy as with the introduction of SLT cameras there were incompatibility issues and

Sigma used to update the TC and sticker the box accordingly, though I'm guessing new TC's are already compatible.  Always ask the seller if the box has been endorsed or if there are any known issues especially if they use SLT.  For DSLR they're fine.

I'm sure you will see for yourself what makes/models/types work with what lenses and in what mode (manual/auto).

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Mark (aka Pirate!)

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