Tamron 1.4x teleconverter problems
Hello y'all. I have a Tamron 1.4x teleconverter that I used back in San Francisco during America's Cup (2011-2013) with some success, then with a 7D. I used that with a 100-400 L IS and later in 2013 with the same 7D with a Tamron 150-600. Soon after...