Been keeping an eye out for a good deal on the Sigma TC-1401 for my two Sport lens when this popped up.

https://www.ebay.com.au/itm/SIGMA-TC...frcectupt=true

See below for compatibility chart.

https://www.sigmaphoto.com/lenses/le...-compatibility

At $327.29 including postage, that is well below the best grey market offerings. The vendor, DCXPERT, is C R Kennedy's retail outlet, and as they are the Australian Sigma distributor there will be no problems with warranty.

BUT, DON'T PROCRASTINATE, THE 20% OFF DEAL ENDS TONIGHT

Oh, and I have no affiliation with Kennedys. I just like to share a GR8 deal when I come across one.