« on: December 11, 2014, 03:56:46 PM »
Discovered to day that my new Tamron tele-converter does not work with my new 7D Mark II. It works fine on both my old 7D and on the 6D. I use it with the 70-300mm L F4-5.6 lens. Hope that a future firmware update allows me to use it.
A firmware upgrade of the *camera* to make it compatible with a 3rd party tc? Forget it. Same problems appeared on the 5d2 and 6d. You can try disabling afma, that helped on some camera bodies to prevent it from locking up.
Issues like this are only solved by the 3rd party, and if the item doesn't have a software update interface (like newer Yn flashes or Sigma lenses) you're hit for six. Probably they'll do a silent or official update of the tc sooner or later so you can sell on your then-old version to someone with an older camera.