Tamron has made two professional and high quality teleconverters. These are optically design to only fit some of the latest tamron lens models. They will not only not work on older or not dedicated other tamron lenses but can even damage the optical lenses of the Tamron lens!

Tamron has made a special page about the Tamron teleconverters which give you all the details you will need to see if the Tamron 1.4x or 2.0x teleconverters are compatibel with your Tamron lens.