Hi There,
I have here a great condition Tamron 1.4x SP AF Pro Teleconverter Extender for Canon EOS EF Canon Lenses and bodies.Optically flawless and outer casing is in perfect condition with no dents or chips or sratches.This teleconverter has been tested with Canon 7D to newer Canon 80D with camera reporting proper aperture reading.Throughout the years I tried teleconverters made by Canon,Sigma,Tamron ,Kenko and even from Promasters and found out that you can get decent results by stopping down and connected to a super telephoto lenses like the Canon 500 f/4,600 f/4 and 300 f2.8 type of lenses.Other slower lenses may not be worth while.This teleconverter extender is white in color so it will match your Canon white lenses.I have included some links to reviews for this teleconverter extender below.Also included is the storage pouch and the end caps.I am asking for $200.00 obo
https://www.imaging-resource.com/lenses/tamron/1.4x-sp-af-pro/review/
https://www.bhphotovideo.com/c/product/185148-REG/Tamron_AF14PC700_1_4x_SP_Pro_Teleconverter.html/reviews